VOLUME 11 Part 1 NORTH AMERICAN FLORA OEDOGONIALES OEDOGONIACEAE Lewis HaNnFrorD TIFFANY BIBLIOGRAPHY JoHN HENDLEY BARNHART Subscription Price, $3.50 Separate Copies, $4.65 PUBLISHED BY THE NEW YORK BOTANICAL GARDEN SEPTEMBER 24, 1937 ANNOUNCEMENT NortH AMERICAN Flora is designed to present in one work descriptions of all plants growing, independent of cultivation, in North America, here taken to include Greenland, Central America, the Republic of Panama, and the West Indies, except Trinidad, Tobago, and Curacao and other islands off the north coast of Venezuela, whose flora is essentially South American. The work will be published in parts at irregular intervals, by the New York Botanical Garden, through the aid of the income of the David Lydig Fund bequeathed by Charles P. Daly. It is planned to issue parts as rapidly as they can be prepared, the extent of the work making it possible to commence publication at any number of points. The completed work will form a series of volumes with the following sequence: Volume 1. Myxomycetes, Schizophyta. Volumes 2to 10 Fungi. Volumes 11 to 13. Algae. Volumes 14 and 15. Bryophyta. Volume 16. Pteridophyta and Gymnuospermae. Volumes 17 to 19. Monocotyledones. Volumes 20 to 34. Dicotyledones. The preparation of the work has been referred to a committee consist- ing of Dr. H. A. Gleason, Dr. J. H. Barnhart, and Dr. Fred J. Seaver. Professor William Trelease, of the University of Illinois, and Dr. William R. Maxon, of the United States National Herbarium, have con- sented to act as an advisory committee. Each author will be wholly responsible for his own contributions, being restricted only by the general style adopted for the work, which must vary somewhat in the treatment of diverse groups. NorvtH AMERICAN FLora is published in parts of variable size; it is ex- pected that four or more parts will be required for each volume. ‘The sub- scription price for all parts published prior to 1936 is fixed at $1.50 for each part; for later parts it is approximately two cents per page. A limited number of separate parts will be sold at an advance of a third above the subscription price. THE NEW YORK BOTANICAL GARDEN FORDHAM BRANCH P. 0. NEW YORK, N. Y. Order OEDOGONIALES By Lewis HanForp TIFFANY Plants aquatic or terrestrial; filaments simple or branching; cells uninu- cleate; chloroplast parietal, generally in the form of a reticulum, with one or more pyrenoids; cell division by the rupture of the wall due to stretching of a ring-like thickening on the inner wall of each cell near the apex, and the forma- tion of new transverse septa between the daughter nuclei; reproduction asex- ually by multiciliate zoospores formed singly in vegetative cells and germinating almost immediately; reproduction sexually by eggs and sperms in oogonia and antheridia; oogonia single or in series, arising as a result of division of a vegeta- tive cell, opening by a pore or Jid, through which the sperm may pass; egg when fertilized becoming an oospore, with a wall of two to four layers, which afte1 a period of rest produces four zoospores (occasionally only one zoospore), two of which in dioecious species are perhaps male and two female, potentially; antheridia either in the same filament as the oogonia or in separate filaments; male filaments approximately the same size as the female, or much smaller; dwarf males, arising from the germination of androspores, epiphytic on or near the oogonium or more rarely scattered; sperms 1 or 2 in each antheridium. Nore: It is quite certain that intensive and careful collecting in the future will show most species of the Oedogoniales to be world-wide in distribution. Many of them will undoubtedly be recorded for North America. The names of all extra-limital species appear in the keys without numbers and are not discussed in the text. One family. Family 1. OEDOGONIACEAE. Family 1. OEDOGONIACEAE By Lewis Hanrorp TIFFANY Characters the same as those of the order. Filaments branched. Vegetative cells with laterally placed setae. : Vegetative cells devoid of setae. 2 Ce Filaments unbranched. 3. Ope oua, 1. BULBOCHAETE Ag. Syn. Alg. xxix. 1817. Filaments usually attached, with unilateral branches; vegetative cells normally widening upwards; basal cell ordinarily the only one capable of division in formation of the main axis. the first new cell forming a long tubular bristle with swollen bulb-like base, the Ban enient cells intercalated between the basal cell and the one next above; division rarely intercal- ary; other vegetative cells potential origin for branches; terminal cell of each branch always furnished with a bristle; oogonium arising by a double division of a vegetative cell; other characters as in the family. Type species, Conferva setigera Roth. Antheridium and oogonium in same filament: monoecious. Oogonium 30-40 uw in length. Vegetative cell longer than broad. 1. B. nana. Vegetative cell shorter than broad. 2. B. monile. Oogonium 40-60 » in length. Pore of oogonium more than 5 » wide. B. megastoma. Pore of oogonium less than 5 w wide. Vegetative cell 1-1} diameters long. Oogonium 28-34 » in diameter. 3. B. robusta. Oogonium 24-28 yw in diameter. 4. B. basispora. Vegetative cell 13-2 diameters long. Oogonium regularly ellipsoid. 5. B. Debaryana. Oogonium cylindric- to oblong-ellipsoid. Length of oogonium 40-48 g. B. mirabilis f. immersa. Length of oogonium 47-58 u. Vegetative cell 13-16 4 in diameter. 6a. B. mirabilis var. gracilis. Vegetative cell 15-20 » in diameter. . 6. B. mirabilis. Antheridium in separate filament (‘dwarf male”) from oogonium: dioecious-nannandrous. Oospore-wall smooth. Length of oogonium 24-39 yu. Suffultory cell without division. Oogonium 23-25 by 26-33 pz. B. doliiformts. Oogonium 29-35 by 24-27 u. 9. B. minuta. Suffultory cell with division. Division of suffultory cell basal. Oogonium 29-35 by 24-27 pw. 9. B. minute. Oogonium 34-44 by 31-38 mu. 7. B. elatior. Oogonium 31-37 by 28-37 pu. B, elatior f. pumila. Division of suffultory cell median or nearly so. Oogonium 36-42 by 33-39 pu. 15. B. angulosa. Oogonium 33-38 by 31-37 p. B. angulosa f. picta. Length of oogonium 40-52 yu. Division of suffultory cell basal. B. diamesandria. Division of suffultory cell median or nearly so. Oogonium about 46 by 44 4. B. elachisiandria. Oogonium 55-64 by 43-51 p. 20. B. oblique. Division of suffultory cell superior. B. glabra. B. anomala. Length of oogonium 75-80 p. Oospore-wall scrobiculate. Oogonium 27-40 u in length. Division of suffultory cell basal. Vegetative cell 13-17 «4 in diameter. Dwarf male stipe 8-9 » in diameter. B. Woronichini. Dwarf male stipe 11-13 » in diameter. 8. B. scrobiculata. Vegetative cell 17-20 u in diameter. 10. B. Brebissonii. 3 NORTH AMERICAN FLORA Division of suffultory cel! inferior. Oogonium 36-43 by 27-34 u. 1). Oogonium 46-50 by 35-37 yp. 12. Division of suffultory cell median or nearly so. Vegetative cell 10-15 u in diameter. Il. Vegetative cell 17-20 « in diameter. 14, Division of suffultory cell superior. Oospore 27-34 uw in length 16. Oospore 33-38 y in length. Oogonium 40-65 pz in length. Diameter of oogonium 40-60 yu. Division of suffultory cell basal. 10. Division of suffultory cell median or nearly so. Idioandrosporous. 29, Gynandrosporous. Diameter of oogonium 40-51 yu. Vegetative cell 1-2 diameters long. 28. Vegetative cell 2-5 diameters long. Diameter of oogonium 52-60 pu. 26. Division of suffultory cell superior. Oogonium subquadrangular-globose. 21; Oogonium subdepressed-globose. 24, Division of suffultory cell supreme. Diameter of oogonium 60-80 pu. Idioandrosporous. 29: Gynandrosporous. Diameter of oogonium 59-70 pz. Length of oogonium 48-56 yp. at, Length of oogonium 57-60 p. Diameter of oogonium 70-80 yu. 22. Oogonium 65-88 yu in length. Oogonium globose. 23. Oogonium pyriform. Oospore-wall crenulate. 13. Oospore-wall variable: smooth to scrobiculate. Division of suffultory cell median or nearly so. Idioandrosporous. 18. Gynandrosporous. Oogonium 36—42 yp in diameter. 16. Oogonium 42-46 uw in diameter. 14a. Division of suffultory cell superior. Diameter of vegetative cell 10-12 u. Diameter of vegetative cell 14-22 p. Vegetative cell usually less than 2 diameters long. Vegetative cell usually more than 2 diameters long. Gynandrosporous. Diameter of oogonium 36-43 yz. 16, Diameter of oogonium 28-32 p. 17, Idioandrosporous. 18, Oospore-wall variable: scrobiculate to crenulate. 13, Oospore-wall reticulate-scrobiculate. Oogonium 54-58 by 41-54 nu. 43, Oogonium 60-70 by 50-58 pu. 19. Oospore-wall angularly pitted. 41, Oospore-wall areolate. 42, Oospore-wall costate. Oogonium 29-40 uv in length. Suffultory cell without division. 30. Suffultory cell. with division supreme. 31. Oogonium 40-65 (68) » in length. Diameter of oogonium 22-27 yp. 32. Diameter of oogonium 27-42 yu. Vegetative cell repand. 33, Vegetative cell cylindric or nearly so. Diameter of oogonium 32-39 u. 34, Diameter of oogonium 28-32 yu. 35. Vegetative cell neither cylindric nor repand. Oogonium 40-56 » in length. Vegetative cel! 17-22 uv in diameter. 36, Vegetative cell 13-18 u in diameter. Dwarf male stipe 17-18 by 28-31 u. 36a. Dwarf male stipe 11-14 by 15-24 pu. Oogonium 40-46 py long. 365. Oogonium 47-53 » long. Oogonium 57-80 yu in length. Oogonium fusiformly ellipsoid. Costae of oospore smooth. Costae of oospore crenulate. Oogonium broadly ellipsoid to ovoid. mw ob wa & & why boy tet tub by bybuby Gaby bitty bytiby putibvbs butts Got uth be mts by ty bibs [VoLUME 1] . Furberae. depressa. Furberae. . intermedia. . Nordstedtii. . borealis. . Brebissonit. . congener, quadrata. subiniermedia. crassa. . sessilds. dispar. . dispar var. Ripartiana. . crassiuscula. valida. . punctulaia, setigera. alabamensis. pyrulum, crenulata. polyandria. . Nordstedtii. inlermedia var. depressa. Nordstedtit var. minor. . borealis. Nordstedtit. suberecta. polyandria. crenulata. praereticulata, gigantea. alpina. aveolata. pygmaea. cimarronea. tenuis. repanda, . reclangularis. hiloensis. . varians, . varians var. hawaiensis. . varians var. subsimplex. . norregica, . rhadinos pora. . rhadinospora {. anliqua. Part 1, 1937] OEDOGONIACEAE oy) Costae of oospore coarsely serrate or crenulate. B. lagoensis. Costae of oospore finely serrate or smooth. Vegetative cell 18-25 by 27-50 u. 37. B. minor. : _ Vegetative cell 15-22 by 22-60 u. B. minor vat. germanica. Oogonium 65-95 yp in length. Diameter of cogonium 29-37 yu. Costae of oospore smooth. B. rhadinospora. _ Costae of oospore crenulate. B. rhadinospora {. antiqua. Diameter of oogonium 38-46 y. Oogonium 67-78 p in length. B, affinis. _ Oogonium 75-87 4 in length. B. litoralis. Diameter of oogonium 46-56 yu. Vegetative cell 19-25 by 40-100 u. Ribs of oospore broadly denticulate. 39. B. insignis. Ribs of oospore reticulate-denticulate. 40. B. reticulata. Vegetative cell 26-27 by 52-54 p. B. anomala. _ Vegetative cell 27-30 by 34-45 yu. B. denticulata. Diameter of oogonium 56-66 u. 38. B. Bullardi. Diameter of oogonium 68-70 4. B. regalis. Oogonium 104-108 u in length. B. imperialis. Reproductive structure uncertain or unknown. Vegetative cell blood-red in color. B. sanguinea. Vegetative cell not blood-red in color. Vegetative cell medianly plicate. B. horrida. Vegetative cell spinose. 44. B. spinosa. Vegetative cell neither pticate nor spinose. Oogonium 20-24 y in diameter. B. spirogranulata. Oogonium 34—42 pu in diameter. B. brevifulta. 1. Bulbochaete nana Wittr. Bih. Sv. Vet.-Akad. Hand]. 1!:7. 1872. Bulbochaete nana var. subbasispora Wittr. Nova Acta Soc. Sci. Upsal. IIT. 93: 50. 1874. Monoecious; oogonium ellipsoid, patent, below terminal seta or vegetative cell; outer wall of oospore longitudinally costate; antheridia 1 or 2, erect (rarely patent), subepigynous or scattered; vegetative cell 10-17 by 10-27 4; oogonium 20-25 (30) by 33-40 uw; oospore 18-23 (28) by 30-38 «; antheridium 7-9 by 5-9 p. TYPE LOCALITY: Sweden. DistRiBuTION: Ohio, Illinois, Oklahoma; Alaska; Greenland. PLATE 1. f. 7. 2. Bulbochaete monile Wittr. & Lundell; Wittr. Nova Acta Soc. Sci. Upsal. IIT. 93:50. 1874. ? Bulbochaele nana Wolle, Fresh-w. Algae U.S.100. 1887. Not B. nana Wittr. 1872. Monoecious, usually few-celled; vegetative cell short and sometimes globose; oogonium ellipsoid, patent (rarely erect), below terminal seta or vegetative cell; outer wall of oospore longitudinally costate; antheridia 1 or 2, erect or patent, subepigynous or scattered; vegetative eell 11-16 by 10-16 4; oogonium 22-25 by 30-38 u; oospore 20-23 by 28-35 yw; antheridium 8-10 by 6-8 nu. TYPE LOCALITY: Sweden. DISTRIBUTION: Massachusetts, New Jersey; British Columbia. Puate 1. f. 1. 3. Bulbochaete robusta (Hirn) Tiff. Ohio Jour. Sci. 34: 323. 1934. Bulbochaete monile var. robusta Hirn, Acta Soc. Sci. Fenn. 27: 349. 1900. Monoecious; vegetative cell often nearly globose; oogonium broadly ellipsoid, usually patent, below terminal seta or vegetative cell; outer wall of oospore longitudinally costate; antheridia 1 or 2, erect er patent, subepigynous or scattered; vegetative cell 14-23 by 14-27 y; oogonium 28-34 by 39-45 4; oospore 26-32 by 37-42 uw; antheridium 8-10 by 5-8 a. Typ LocaLity: Germany. DISTRIBUTION: Ohio, Indiana. PuateE 1. f. 2. 6 NORTH AMERICAN FLORA [VoLuME 11 4, Bulbochaete basispora Wittr. & Lundell; Wittr. Nova Acta Soc. Sci. Upsal. IIT. 99:50. 1874. Monoecious; oogonium ellipsoid or subcylindric-ellipsoid, patent or erect, below vegetative cell; outer oospore-wall longitudinally costate; antheridia 1-3, patent or erect, scattered or subepigynous; vegetative cell 15-19 by 15-23 u; oogonium 24-28 by 40-45 uw; oospore 22-25 by 38-43 uw; antheridium 8-11 by 6-8 un. TYPE LOCALITY: Sweden. DISTRIBUTION: Ohio. Piate 1. f. 6. 5. Bulbochaete Debaryana Wittr. & Lundell; Wittr. Nova Acta Soc. Sci. Upsal. TIT. 93:51. 1874. Monoecious; oogonium ellipsoid, patent, below vegetative cell or terminal seta; outer wall of oospore longitudinally costate; antheridia 1-?, patent or seldom erect, subepigynous or scattered; vegetative cell 18-22 by 23-44 4; oogonitum 27-33 by 43-50 4; oospore 25-30 by 40-48 yu; antheridium 10-12 by 8-9 pz. TYPE LOCALITY: Sweden, DrsTRIBUTION: Canada. PLATE 1. f. 3. 6. Bulbochaete mirabilis Wittr. Oefv. Sv. Vet.-Akad. Forh. 27: 137. 1870. Bulbochaete mirabilis var. lapponica Wittr. & Lundell; Wittr. Nova Acta Soc. Sci. Upsal. TIT. 93: 51. 1874. Monoecious; oogonium cylindric-ellipsoid to suboblong-ellipsoid, patent (rarely erect), below terminal seta or vegetative cell; outer wall of oospore longitudinally costate; antheridia 1-4, erect or patent, subepigynous or scattered; vegetative cell 15-20 by 20-40 »; oogonium 26-33 by 46-58 u; oospore 25-31 by 44-56 uw; antheridium 9-12 by 6-9 yu. TYPE LOCALITY: Sweden. DisTRIBUTION : Massachusetts, New Jersey, Michigan, Illinois, Wisconsin, Minnesota; Greenland. PLATE 1. f. 4. 6a. Bulbochaete mirabilis var. gracilis (Pringsh.) Hirn, Acta Soc. Sci. Fenn, 27: 353. 1900. Bulbochaete gracilis Pringsh. Jahrb. Wiss. Bot. 1: 74. 1857. Vegetative cell 13-16 by 17-32 y; oogonium 20-28 by 47-55 4; oospore 18-26 by 45-53 yw; antheridium 8-11 by 6-8 yu. TYPE LOCALITY: Germany. DISTRIBUTION: Ohio. PLATE 1. f. 3. 7. Bulbochaete elatior Pringsh. Jahrb. Wiss. Bot. 1:73. 1857. Dioecious, nannandrous, gynandrosporous; oogonium depressed-globose to depressed- subquadrangular-globose, erect or seldom patent, below androsporangium; division of suffultory cell basal; oospore smooth; androsporangia epigynous or rarely scattered, 1 or 2; dwarf male usually on suffultory cell, antheridium exterior, unicellular, stipe scarcely longer than the antheridium; vegetative cell 13-18 by 20-63 »; oogonium 34-44 by 31-38 u; oospore 32-42 by 29-36 w; androsporangium 10-13 by 8-11 4; dwarf male stipe 8-10 by 18-35 uw; antheridium 6-8 by 9-ll u. TYPE LocaLity: Germany. DISTRIBUTION: Massachusetts. PuLaTE 1. f. 11. 8. Bulbochaete scrobiculata (Tiff.) Tiff. Ohio Jour. Sci. 34: 323. 1934. Bulbochaete elatior var. scrobiculata Tiff. Trans. Am. Mier. Soc. 47:135. 1928. Dioecious, nannandrous, gynandrosporous; oogonium depressed-globose to nearly globose, usually erect, below androsporangium or vegetative cell; division of suffultory cell basal; oospore-wall minutely scrobiculate; androsporangia epigynous or scattered, 1 or 2; dwarf male Part 1, 1937] OEDOGONIACEAE 7 on oogonium; antheridia 1 or 2, exterior; vegetative cell 13-16 by 28-40 u; oogonium 28-44 by 28-36 u; oospore 26-42 by 26-34 n; androsporangium 10-13 by 10-16 uw; antheridium 6-8 by 4-7 w; dwarf male stipe 11-13 by 16-20 u. ‘TYPE LOCALITY: Mobile, Alabama. DISTRIBUTION: Alabama. Puate 1. f. &. 9. Bulbochaete minuta W. & G. West, Trans. Linn. Soc. II. 6: 126. 1902. Dioecious, nannandrous, gynandrosporous; oogonium depressed-globose, patent or erect, below the androsporangium, division of oogonium median or nearly so; suffultory cell without division, or with division basal; oospore-wall smooth; androsporangium unicellular, epigynous; dwarf male on suffultory cell; antheridium exterior, unicellular; stipe twice as long as anther- idium, curved; vegetative cell 9-12 by 18-35 »; oogonium 29-35 by 24-27 u; oospore 27-33 by 22-25 »; androsporangium 9-11 by 6-9 w; dwarf male 6-7 by 18-20 u. TYPE LocaLiry: Ceylon. DISTRIBUTION: Massachusetts, Florida, Oklahoma. Prats 2. f. 13. 10. Bulbochaete Brebissonii Kiita. Tab. Phyc. 4:19. 1854. Bulbochaete tumida Wittr. Oefv. Sv. Vet.-Akad. Férh. 27: 139. 1870. Dioecious, nannandrous, gynandrosporous; oogonium depressed-subquadrangular-globose, erect, below terminal seta or androsporangium; division of the suffultory cell basal; outer oospore-wall scrobiculate; androsporangia scattered or epigynous, 1-3; dwarf male on oogonium (rarely on adjacent cells); antheridium interior; stipe slightly curved, shorter than antheridium; vegetative cell 17-20 by 50-90 yu; oogonium 42-50 by 37-45 uw; oospore 40-48 by 35-43 x; androsporangium 1]—15 by 12-18 »; dwarf male 10-12 by 28-33 uz. Types LocaLity: Europe. DistRIBUTION: Massachusetts, Michigan, Illinois; Alaska; British Columbia. PLATE 1. f. 9. 11. Bulbochaete Furberae Collins, Rhodora 20: 142. 1918. Dioecious, nannandrous, gynandrosporous; oogonium depressed-globose, below terminal seta, patent (rarely erect); division of suffultory cell inferior; outer wall of oospore scro- biculate; androsporangia 1-9, scattered; dwarf male on oogonium, stipe strongly curved; antheridium interior; vegetative cell 10-15 by 30~75 u; oogonium 36-43 by 27-34 4; oospore 34-41 by 25-32 uw; androsporangium 9-10 by 8-9 4; dwarf male 7-8 by 20-25 u. Type LOCALITY: Woods Hole, Massachusetts. : DISTRIBUTION: Massachusetts, North Carolina, Wyoming. PLATE 2. f. 12. 12. Bulbochaete depressa (Taft) Taft, sp. nov. Bulbochaete Furberae var. depressa Taft, Bull. Torrey Club 62: 283. 1935. Dioecious, nannandrous, gynandrosporous; oogonium depressed-globose, terminal or rarely below suffultory cell, patent or rarely erect; division of suffultory cell inferior; outer wall of oospore scrobiculate; androsporangia 1-3, epigynous; dwarf male curved, on or near oogo- nium; antheridium interior; vegetative cell 13-17 by 33-83 u; oogonium 46-50 by 35-37 yw; oospore 44-48 by 32-35 u; androsporangium 11-14 by 6-10 u; dwarf male 10-12 by 26-30 p. Type Locacity: Oklahoma. DISTRIBUTION: Oklahoma. PLATE 2. f. 23. 13. Bulbochaete crenulata Pringsh. Jahrb. Wiss. Bot. 1:72. 1857, Bulbochaete crenulata var. plena Wittr. Bib. Sv. Vet.-Akad. Handl. 14:19. 1872. Dioecious, nannandrous, gynandrosporous, oogonium subdepressed-globose, patent, below terminal seta or androsporangium, or rarely vegetative cell; division of suffultory cell median 8 NORTH AMERICAN FLORA (VOLUME Il or slightly below; spore-wall scrobiculate to crenulate; androsporangia epigynous or scattered, 1-5; dwarf male on or near oogonium; antheridium interior; stipe slightly curved, shorter than antheridium; vegetative cell 16-20 by 32-70 1; oogonium 43-48 by 35-43 u; oospore 40-46 by 33-40 »; antheridium 10-15 by 7-10 u; dwarf male 9-10 by 24-26 p. Type Locauity: Germany. DIsTRIBUTION: Ohio, Michigan, Illinois, Florida, Oklahoma. PLATE 2. f. 17. 14. Bulbochaete intermedia De Bary, Abh. Senck. Nat. Ges. 1:72. 1854. Bulbochaete crenulata var. supramediana Wittr.; Wittr. & Nordst. Algae Exsicc. 509. 1883; Bot. Notiser 1883: 148. 1883. Bulbochaete intermedia {. americana Hirn. Acta Soc. Sci. Fenn. 27: 328. 1900. Bulbochaete intermedia f. supramediana Hirn, Acta Soc. Sci. Fenn. 27: 328. 1900. Dioecious, nannandrous, gynandrosporous; oogonium subdepressed-globose, patent, below androsporangium; division of suffultory cell nearly median; outer wall of oospore scrobiculate; androsporangia 1 or 2, epigynous or rarely scattered; dwarf male on oogonium; antheridium interior; stipe slightly curved, shorter than the antheridium; vegetative cell 17-20 by 35-70 y; oogonium 40-48 by 31-40 uw; oospore 38-46 by 30-38 uw; androsporangial cell 11-13 by 7-12 u; dwarf male 9~10 by 21-26 p. TYPE LOCALITY: Germany. DISTRIBUTION: Massachusetts, Connecticut, Pennsylvania, Ohio, Michigan, Indiana, IIlinois, Towa, Florida, Oklahoma; Alaska; British Columbia; Greenland. PLatE 2. f. 14 14a. Bulbochaete intermedia var. depressa Wittr. Nova Acta Soc. Sci. Upsal. III. 93:44. 1874, Bulbochaete intermedia var. depressa Hirn; Heering, in Pascher, Siissw.-fl. Deutschl. 6: 233. 1914. Vegetative cell a little longer than in the species; oogonium depressed-globose; outer oospore-wall scrobiculate, often nearly smooth; division of the suffultory cell a little above the median position (rarely a little below median) ; vegetative cell 14-19 by 35-88 u; oogonium 42-46 by 30-40 yu: oospore A0—-44 by 28-38 uw; androsporangial cell 11-13 by 9-12 uw; dwarf male 9-11 by 22-25 4. Types 1o- cautry: Sweden. DistriBution: Iowa; British Columbia. Prats 2. f. 15. 15. Bulbochaete angulosa Wittr. & Lundell; Wittr. Nova Acta Soc. Sci. Upsal. TIT. 93:45. 1874. ? Bulbochaele elachistandria Wolle, Fresh-w. Algae U.S. 97. 1887. Not B. elachistandria Wittr. 1874, Dioecious, nannandrous, gynandrosporous; oogonium biconically and angularly globose, apically truncate, below terminal seta or rarely androsporangium; division of suffultory cell a little above median position; oospore-wall smooth; androsporangia scattered or epigynous, 1-3; dwarf male on oogonium; antheridium interior; stipe somewhat curved; vegetative cell 13-18 by 20-45 u; oogonium 36-42 by 33-39 4; oospore 34-40 by 30-36 x; androsporangium 10-11 by 9-10 4; dwarf male 8-9 by 18-21 u. TYPE LOCALITY: Sweden. DISTRIBUTION: Pennsylvania. Puiare 1. f. 10. 16. Bulbochaete Nordstedtii Wittr. Nova Acta Soc. Sci. Upsal. III. 93:44. 1874, Dioecious, nannandrous, gynandrosporous; oogonium depressed-globose or subquad- rangularly so, patent, below androsporangium or rarely terminal seta; division of suffultory cell superior (occasionally submedian); oospore-wall finely scrobiculate or nearly smooth; androsporangium unicellular, epigynous; dwarf male on oogonium, stipe slightly curved, shorter than antheridium; vegetative cell 14-18 by 28-85 »; oogonium 36-43 by 29-36 y; oospore 34-41 by 27-34 uw; androsporangium 10-12 by 9-12 4; dwarf male 9-19 by 23-25 u. TYPE LOCALITY: Sweden. DISTRIBUTION: Massachusetts, Connecticut, Ohio, Illinois, Oklahoma; Alaska; Greenland. PLATE 2. f. 20 Part 1, 1937] OEDOGONIACEAE 9 17. Bulbochaete suberecta (Collins) Tiff. Ohio Jour. Sci. 34: 323, 1934, Bulbochaete Nordstedtii f. suberecta Collins, Tufts Coll. Stud. 3:88. 1912. Dioecious, nannandrous, gynandrosporous; oogonium depressed-globose, usually erect, below androsporangium; division of suffultory cell supramedian to superior; oospore-wall finely scrobiculate; androsporangium unicellular, epigynous; dwarf male on oogonium,; vegeta- tive cell 12-15 by 28-80 w; oogonium 28-32 by 34-38 4; oospore 26-30 by 32-36 uw; andro- sporangium 7-8 by 5-6 »; dwarf male 9-16 by 10-20 u. TYPE LocaALIty: Arlington, Massachusetts. DISTRIBUTION: Massachusetts. PLATE 2. f. 16. 18. Bulbochaete polyandria Cleve; Wittr. Oefv. Sv. Vet.-Akad. Foérh. 27: 140. 1870. Dioecious, nannandrous, idioandrosporous; oogonium subdepressed-globose, patent, below terminal seta or vegetative cell; division of suffultory cell superior (rarely submedian); outer oospore-wall scrobiculate or nearly smooth; androsporangium to 10-seriate; dwarf male on oogonium; antheridium interior; stipe slightly curved, shorter than antheridium; vegetative cell 15-20 by 45-100»; oogonium 39-46 by 32-42 4; oospore 37-44 by 30-40 wu; androspor- angium 12-14 by 11-15 »; dwarf male 8-9 by 23-26 zp. TYPE LOCALITY: Sweden. DIsTRIBUTION: Massachusetts, Florida. PLateE 2. f. 18, 19. 19. Bulbochaete gigantea Pringsh. Jahrb. Wiss. Bot. 1:71. 1857. Dioecious, nannandrous, idioandrosporous; oogonium subdepressed-globose, or rarely depressed-oboviform-globose, patent, below terminal seta, rarely below vegetative cell; division of suffultory cell slightly below median; outer wall of oospore reticulate-scrobiculate; andro- sporangia 1-5; dwarf male slightly longer than the oogonium on which it develops; antheridium interior; stipe about twice as long as antheridium, curved; vegetative cell 24-32 by 50-112 y; oogonium 60-70 by 50-58 »; oospore 58-68 by 48~56 wu; androsporangial cell 18-20 by 10-14 u; dwarf male stipe 10-13 by 28-45 y; antheridial cell 13-14 by 20-30 u. TYPE LOCALITY: Germany. aa ; DISTRIBUTION: Pennsylvania, Michigan, Iowa, Florida, Oklahoma. Priate 3. f. 24, 25. 20. Bulbochaete obliqua Lundell; Hirn, Acta Soc. Sci. Fenn. 27: 344. 1900. Dioecious, nannandrous, gynandrosporous or idioandrosporous; oogonium depressed- globose, patent, below terminal seta or (rarely) androsporangium; division of suffultory cell median or nearly so; oospore-wall smooth; androsporangia 1-?, epigynous; dwarf male on oogonium; antheridium interior; vegetative cell 21-27 by 42-108 n; cogonium 55-64 by 43- 51 y; oospore 53-62 by 40-49 uw; androsporangium 16-21 by 7-10 »; dwarf male stipe 9-10 by 25~36 w; antheridium 10-12 by 15-21 p. Tyre LocaLity: Europe. DISTRIBUTION: Michigan, Oklahoma. PLate 3. f. 26. 21. Bulbochaete sessilis Wittr. Bih. Sv. Vet.-Akad. Handl. 1!: 18. 1872. * Dioecious, nannandrous, gynandrosporous; oogonium subquadrangularly globose, patent, below terminal seta or occasionally below vegetative cell; division of suffultory cell superior; outer oospore-wall scrobiculate; androsporangia scattered, 1-3; dwarf male on oogonium or 10 NORTH AMERICAN FLORA [VoLUME 11 rarely suffultory cell; antheridium interior; stipe a little curved, shorter than antheridium; vegetative cell 19-22 by 38-724; oogonium 51-56 by 44-504; oospore 48-54 by 42-48 un; androsporangium 10-13 by 10-12 4; dwarf male 9-11 by 26-29 yu. TYPE LOCALITY: Sweden. DIstRiBurion: Canada. Puate 3. f. 27. 22. Bulbochaete setigera (Roth) Ag. Syn. Alg. 71. 1817. Conferva seligera Roth, Catalecta Bot. 3: 283. 1806. ? Bulbochaete Canbyii H.C. Wood, Fresh-w. Algae N. Am. 202. 1873. ? Bulbochaete setigera var. Canbyit 'Wolle, Fresh-w. Algae U.S.99. 1887. Dioecious, nannandrous, gynandrosporous; oogonium (quadrangularly) subdepressed- or depressed-globose, patent, generally below terminal seta, more rarely below androsporangium or vegetative cell; division of suffultory cell slightly above median or rarely superior; outer oospore-wall scrobiculate; androsporangia scattered or more rarely epigynous, 1-3; dwarf male on oogonium or near it; antheridium interior; stipe curved, shorter than antheridium; vegetative cell 25-28 by 62-140 »; oogonium 70-80 by 56-65 u; oospore 67-77 by 53-62 p; androsporangium 16-20 by 10-18 w; dwarf male 11-14 by 30-36 u. TypPE LOCALITY: Europe. DISTRIBUTION: Connecticut, New Jersey, Michigan, South Carolina, Florida, Alabama. PiaTE 3. f. 30. 23. Bulbochaete alabamensis Transeau & Brown; Tiff. Trans. Am. Micr. Soc. 47: 142. 1928. Dioecious, nannandrous, gynandrosporous; oogonium globose, depressed-globose, or rarely angularly globose, patent; division of suffultory cell superior; outer spore-wall scrobic- ulate; androsporangium hypogynous or epigynous or rarely scattered; dwarf male a little shorter than oogonium, on vegetative cell; antheridium interior; stipe a little curved; vegetative cell 22-40 by 62-111 4; oogonium 77-92 by 70-88 u; oospore 75-90 by 68-86 uw; dwarf male stipe 14-18 by 35~38 uw; antheridium 14-15 by 15-16 nu. TYPE LOCALITY: Mobile, Alabama. DIsTRIBUTION: North Carolina, Florida, Alabama. Puate 3. f. 28 24. Bulbochaete dispar Wittr.; Wittr. & Nordst. Algae Exsicc. 401. 1882; Bot. Notiser 1882:54. 1882. Dioecious, nannandrous, gynandrosporous or idioandrosporous; oogonium subdepressed- globose, patent, below terminal seta or rarely vegetative cell; division of suffultory cell superior (rarely submedian); outer spore-wall thick, finely scrobiculate; androsporangia scattered, 1 or 2; dwarf male on oogonium; antheridium interior; stipe a little curved, shorter than anther- idium; vegetative cell 16-21 by 32-95 u; oogonium 44-56 by 42-51 »; oospore 40-54 by 38-48 uw; androsporangium 12-16 by 10-12 u; dwarf male 9-11 by 23-26 yn. Typ Locality: Sweden. DistTRIBUTION: Michigan; Greenland. PLATE 4. f. 37. 25. Bulbochaete crassiuscula Nordst. Oefv. Sv. Vet.- Akad. Férh. 344: 30. 1877. Bulbochaete setigera Mobius, Abh. Senck. Nat. Ges. 18: 315. 1894. Not B. setigera Ag. 1817. ? Bulbochaete ellipsospora G. West, Jour. Bot. 37:54. 1899. Dioecious, nannandrous, idioandrosporous; oogonium (subquadrangularly) depressed- globose, patent, below terminal seta or occasionally vegetative cell; division of suffultory cell superior (rarely submedian); outer oospore-wall scrobiculate; androsporangia 1-4; dwarf male on oogonium or near it; antheridium interior; stipe slightly curved, shorter than antheridium; Part 1, 1937] OEDOGONIACEAE 11 vegetative cell 22-27 by 55-148 4; oogonium 60-78 by 50-62 u; oospore 58-76 by 48-60 u; antheridium 16-19 by 10-13 »; dwarf male 12-14 by 30-34 un. TYPE LOCALITY: Sweden. DISTRIBUTION: Massachusetts, Michigan, Illinois, Oklahoma; Canada; Greenland. PLatTE 4. f. 32, 33. 26. Bulbochaete crassa Pringsh. Jahrb. Wiss. Bot. 1:72. 1857. Dioecious, nannandrous,, gynandrosporous; oogonium subdepressed-globose to globose, patent, below terminal seta or rarely vegetative cell; division of suffultory cell median or a little above; outer oospore-wall scrobiculate; androsporangia scattered, up to 4-seriate; dwarf male a little longer than oogonium; antheridium exterior, unicellular; stipe about twice as long as antheridium; vegetative cell 22-26 by 44-60 »; oogonium 52-60 by 42-51 u; oospore 50-58 by 40-48 uw; androsporangium 13-15 by 14~16 uw; dwarf male stipe 9-11 by 32~44 y; antheridium 8-9 by 21-24 p. Type LOCALITY: Germany. DISTRIBUTION: Massachusetts, Ohio. PuLate 3. f. 29. 27. Bulbochaete valida Wittr. Bih. Sv. Vet.-Akad. Handl. 11:17. 1872. Dioecious, nannandrous, gynandrosporous; oogonium depressed-globose, patent, below terminal seta; division of suffultory cell about median; outer oospore-wall scrobiculate; andro- sporangia scattered, 1-3; dwarf male on oogonium; antheridium interior; stipe a little longer than antheridium, curved; vegetative cell 23-27 by 46-95 nu; oogonium 59-70 by 48-56 yu; oospore 57-68 by 46-54 «; androsporangium 18-20 by 10-14 4; dwarf male stipe 9-10 by 23-29 (-40) uw; antheridium 11-12 by 20-22 u. ‘TYPE LOCALITY: Sweden. DISTRIBUTION: Michigan. PLATE 3. f. 31. 28. Bulbochaete quadrata Wittr. Bih. Sv. Vet.-Akad. Handl. 2:19. 1872. Dioecious, nannandrous, gynandrosporous; oogonium (subquadrangularly) subdepressed- globose, patent, below androsporangium; division of suffultory cell inframedian (rarely nearly median); outer oospore-wall scrobiculate; androsporangia 1 or 2, epigynous, rarely scattered; dwarf male on cogonium; antheridium interior; stipe a little curved, shorter than antheridium ; vegetative cell 19-25 by 30-50 4; oogonium 40-50 by 40-45 u; oospore 38-48 by 38-43 p; androsporangium 15-17 by 11-12 4; dwarf male 10-12 by 27-32 yu. TYPE LocaLity: Sweden. DISTRIBUTION: Ohio. PLaTE 4. f. 34. 29. Bulbochaete congener Hirn, Acta Soc. Sci. Fenn. 27: 346, 1900. Dioecious, nannandrous, idioandrosporous; oogonium depressed-globose or more rarely oboviform-globose, patent, below terminal seta; division of suffultory cell inframedian; outer oospore-wall scrobiculate; androsporangia 1-4; dwarf males a little shorter than the oogonium on which they develop; antheridium interior; stipe about twice as long as the antheridial cell, curved; vegetative cell 19-24 by 40-75 »; oogonium 44-54 by (37-) 40-48 4; oospore 42-52 by 35-46 ; androsporangial cell 13-15 by 8-13»; dwarf male 9-13 by 29-34 y; antheridial cell 10-11 by 14-17 p. Type Locatty: Brazil. DISTRIBUTION: Iowa, Florida. PLATE: 2. f. 21, 22. 12 NORTH AMERICAN FLORA [VoLUME 11 30. Bulbochaete pygmaea Pringsh. Jahrb. Wiss. Bot. 1: 74. 1857. Bulbochaete pygmaea var. minor Pringsh. Jahrb. Wiss. Bot. 1: 74. 1857. Dioecious, nannandrous, gynandrosporous; oogonium ellipsoid, patent, below terminal seta or vegetative cell; outer wall of oospore longitudinally costate; suffultory cell without divi- sion; androsporangia subepigynous or scattered, 1—?-celled; dwarf male near oogonium; antheridium exterior, 1-3; vegetative cell 11-15 by 8-15; oogonium 22-27 by 32-404; oospore 20-23 by 30-38 uw; androsporangium 7-10 by 6-9 »; dwarf male stipe 11-12 by 15-19 y; antheridium 7-8 by 7-8 pu. : Types Locality: Germany. DISTRIBUTION: Massachusetts, Florida. PuateE 4. f. 41. 30a. Bulbochaete pygmaea var. erecta Jao, Rhodora 38: 72. 1936. Smaller; oogonium usually erect; plant usually less than 10-celled and often unbranched; vegetative cell 13-16 by 10- 16 4; oogonium 19-22 by 29-38 4; oospore 18-21 by 28-35 yw; androsporangium 1--2-celled, 10 by 3 y; dwarf male stipe 11 by 16 «; basal cell 13-16 by 19-22 4. ‘Typ LocaLiry: Woods Hole, Massachu- setts. DistTRIBUTION: Massachusetts. Prats 4. f. 42, 43. 31. Bulbochaete cimarronea Taft, Bull. Torrey Club 62: 282. 1935 Dioecious, nannandrous, gynandrosporous; oogonium ellipsoid, patent, below terminal seta or rarely below vegetative cell; oospore ellipsoid, outer spore-wall longitudinally costate, ribs entire; division of suffultory cell supreme; androsporangia 1 or 2, epigynous; dwarf male located on vegetative cell, rarely on oogonium; antheridia 1 or 2, exterior; vegetative cell 14-17 by 17-23 »; oogonium 26-29 by 36-39 uw; oospore 24-26 by 35-37 uw; androsporangium 10-11 by 5~7 uw; dwarf male stipe 13-17 by 20-23 uw; antheridium 7-8 by 5~7 u. TYPE LocALITy: Oklahoma. DISTRIBUTION: Oklahoma. PLATE 4. f. 40. 32. Bulbochaete tenuis (Wittr.) Hirn, Acta Soc. Sci. Fenn. 27: 368. 1900; Tiff. Oedog. Monog. 43. 1930. Bulbochaete rectangularis var. tenuis Wittr. Nova Acta Soc. Sci. Upsal. IIT. 93: 56. 1874. Bulbochaete rectangularis var. norvegica Wittr. Nova Acta Soc. Sci. Upsal. ITI. 98: 56, 1874. Dioecious, nannandrous, gynandrosporous; oogonium suboblong-ellipsoid, erect or patent, below terminal seta or androsporangium; outer oospore-wall longitudinally costate; andro- sporangia epigynous or more rarely scattered, 1—-?; dwarf male on or near oogonium; antheridia exterior, 1-3; vegetative cell 13-16 by 20-40 u; oogonium 22-26 by 42-48 u; oospore 20-24 by 40-46 u; androsporangium 10-12 by 13-19 u; dwarf male stipe 12-14 by 18-24 yw; anther- idium 7-9 by 6~7 u. TYPE LOCALITY: Sweden. DISTRIBUTION: Massachusetts, Michigan. PLATE 5. f. 54. 33. Bulbochaete repanda Wittr. Nova Acta Soc. Sci. Upsal. ITT. 9:55. 1874. Bulbochaele rectangularis var. Lundellit Wittr. Nova Acta Soc. Sci. Upsal. IIT. 93: 56. 1874. ? cana rhadinospora Wolle, Fresh-w. Algae U.S. 103. 1887. Not B. rhadinospora Wittr. Dioecious, nannandrous, gynandrosporous; oogonium suboblong-ellipsoid, patent or erect, below androsporangium, terminal seta or vegetative cell; outer oospore-wall longitudi- nally costate; androsporangia epigynous or subepigynous, 1—?; dwarf male near or on oogonium; antheridia exterior, 1-3; vegetative cell frequently repand, 12-17 by 24-60 yu; oogonium 26-36 by 43-58 »; oospore 21-33 by 40-50 wu; androsporangium 13-15 by 16~21 u; dwarf male stipe 11-15 by 21-27 yw; antheridium 7-10 by 5-7 pu. TYPE LOCALITY: Sweden and Greenland. DisrrisuTion: Maine, Massachusetts, New Jersey, Florida, Oklahoma; Greenland. PLATE 6. f. 57. Part 1, 1937] OEDOGONIACEAE 13 34. Bulbochaete rectangularis Wittr. Oefv. Sv. Vet.- Akad. Férh. 27: 142. 1870. ? Bulbochaete ignota H. C. Wood, Fresh-w. Algae N. Am. 201. 1873. Dioecious, nannandrous, gynandrosporous; oogonium ellipsoid, patent or more rarely erect, below terminal seta or androsporangium or more rarely vegetative cell; outer oospore- wall longitudinally costate; androsporangia scattered or epigynous, 1-?; dwarf male near or occasionally on oogonium; antheridia exterior, 1-4; vegetative cell subrectangular in section, 16-23 by 20-46 uw; oogonium 32-39 by 45-63 nv; oospore 29-37 by 43-61 4; androsporangium 13-16 by 10-27 4; dwarf male stipe 14~18 by 22-27 uw; antheridium 8-10 by 5-7 p. ‘TYPE LOCALITY: Sweden. DIstRIBUTION: Massachusetts, Rhode Island, Connecticut, Pennsylvania, Ohio, Michigan, Illinois, Indiana, Oklahoma. Pate 5. f. 33, 35. Bulbochaete hiloensis (Nordst.) Tiffany, sp. nov. Bulbochaete rectangularis var. hiloensis Nordst. Minnesskr. Fys. Sallsk. Lund 7:22. 1878. Dioecious, nannandrous, gynandrosporous; oogonium ellipsoid, patent or erect, below terminal seta or androsporangium or more rarely vegetative cell; outer wall of oospore longi- tudinally costate; androsporangia generally epigynous, 1-?; dwarf male near oogonium; antheridia exterior, 1-4; vegetative cell subrectangular in section, 14-20 by 24-48 uw; cogonium 28-33 by 43-51 4; oospore 26-30 by 38-45 4; androsporangium 12-17 by 13-16 u; dwarf male stipe 13-17 by 22-27 uw; antheridium 8-9 by 5-7 nu. TYPE Locality: Hawaii. DistRiBuTION: Oklahoma, Florida; Pennsylvania (?). PLATE 5. f. 50. 36. Bulbochaete varians Wittr. Oefv. Sv. Vet.-Akad. Forh. 27: 143. 1870. Dioecious, nannandrous, gynandrosporous; oogonium ovoid, patent or erect, below ter- minal seta or below androsporangial cell; outer oospore-wall longitudinally ribbed, ribs serrate; androsporangia scattered, epigynous or hypogynous, | or 2; dwarf male on or near the oogo- nium; antheridia exterior, 1-3; vegetative cell 17-22 by 22-33 u; oogonium 30-36 by 44-54 yu; oospore 28~34 by 42-52 4; androsporangial cell 14-17 by 14-18 uw; dwarf male stipe 14-16 by 24-27 wu; antheridial cell 8-10 by 6-7 u. TYPE LOCALITY: Sweden. ee . Sate oe DIstRIBUTION: Ohio, Indiana, Michigan, Illinois, lowa, South Carolina, Alabama, Mississippi; Canada. Piate 5. f. 47. 36a. Bulbochaete varians var. hawaiensis Nordst. Minnesskr. Fys. Sdllsk. Lund 7:21. 1878. Vegetative cell 13-18 by 17-36 uw; oogonium 27-30 by 44-54 4; androsporangium 12-16 by 13-14 p; dwarf male stipe 17-18 by 28-3! yw; antheridium 10-11 by 6-74. Tyre Locauity: Hawaii. Drs- TRIBUTION: Ohio, Illinois. Pare 5. f. 49. j : . 366. Bulbochaete varians var. subsimplex (Wittr.) Hirn, Acta Soc. Sci. Fenn. 27: 357. 1900. Bulbochaete pygmaea var. major Pringsh. Jahrb. Wiss. Bot. 1: 74. 1857. Bulbochaete subsimplex Wittr. Oefv. Sv. Vet.-Akad. Férh. 27: 142. 1870. Bulbochaete dumosa H. C. Wood, Fresh-w. Algae N. Am. 202. 1873. Bulbochaele varians var. alpina Wittr. & Lundell; Wittr. Nova Acta Soc. Sci. Upsal. IIT. 93:53. 1874. Bulbochaete reticulata var. minor Lemmerm. Forsch. Biol. Sta. Plén 3: 25. 1895. Smaller in nearly all parts; ribs of oospore serrulate or smooth; vegetative cell 13-18 by 16-34 4; oogonium 26-30 by 39-46 u; oospore 24-28 by 37-44 mu; androsporangial cell 10-14 by 7-16 u; dwarf male stipe 11-14 by 15-24 yw; antheridial cell 7-8 by 5-7 uw. Type .ocauity: Europe. DisTRiBuTIon: Pennsylvania, Ohio, Illinois, Iowa, Mississippi; British Columbia. PLatTE 5. f. 48. 37. Bulbochaete minor A. Br.; Kiitz. Sp. Alg. 422. 1849. Dioecious, nannandrous, gynandrosporous; oogonium ovoid, erect or rarely patent, below terminal seta, androsporangial cell, or more rarely vegetative cell; outer oospore-wall longi- tudinally costate; androsporangia epigynous, subepigynous, or scattered, 1-?; dwarf male on or near oogonium; antheridia exterior, 1-4; vegetative cell 18-25 by 27-50 u; oogonium 32-42 14 NORTH AMERICAN FLORA ([VoLuME 11 by 59-69 u; oospore 30-40 by 57-67 uw; androsporangium 15-16 by 16-21 »; dwarf male stipe 12-15 by 22-24 w; antheridium 6-10 by 6-7 u. TYPE LocaLIty: Europe. DisTRIBUTION: New Jersey, Indiana, Illinois, Iowa. PLATE 5. f. 44. 38. Bulbochaete Bullardi Transeau & Tiff. Ohio Jour. Sci. 19: 241. 1919. Dioecious, nannandrous, idioandrosporous; oogonium ovoid-ellipsoid or ellipsoid, erect, terminated by long seta; pore evident and supramedian; oospore filling or nearly filling oogo- nium; costae of outer wall of oospore dentate, the teeth connected by transverse lines, longi- tudinal costae uniting irregularly; androsporangia 1-6; dwarf male slightly curved, on oogonium or suffultory cell or vegetative cell; antheridia exterior, 1-3; vegetative cell 20-32 by 60-165 y; oogonium 56-66 by 70-96 u; oospore 54-64 by 67-94 u; androsporangium 18-21 by 15-33 p; dwarf male stipe 18-21 by 30-33 y; antheridium 9-14 by 6-10 pz. TYPE LOCALITY: Winchester, Massachusetts. DISTRIBUTION: Massachusetts, Florida. PLATE 5. f. 45, 46, 39, Bulbochaete insignis Pringsh. Jahrb. Wiss. Bot. 1: 73. 1857. ? Bulbochaete Pringsheimiana Archer, Quart. Jour. Micr. Sci. I]. 6: 122. 1866. Bulbochacte speciosa Wittr. Oefv. Sv. Vet.-Akad. Férh. 27: 143. 1870. ? Bulbochaete pachyderma Reinsch, Contr. Alg. Fung. 1: 82. 1875. ? Bulbochaete anomala Nordst. Sv. Vet.-Akad. Handl. IJ. 228: 8. 1888. Dioecious, nannandrous, gynandrosporous; oogonium ellipsoid, erect or patent, below androsporangium or terminal seta or vegetative cell; oospore ellipsoid with broadly denticulate longitudinal costae on the outer oospore-wall; androsporangia epigynous or scattered, 1-?; dwarf male near or on oogonium; antheridia exterior, 1-3; vegetative cell 19-25 by 48-88 y; oogonium 46-56 by 70-90 uw; oospore 44-54 by 68-88 uw; androsporangium 16-20 by 9-25 u; dwarf male stipe 16-19 by 29-33 uw; antheridium 10-13 by 7-10 pu. TYPE LOCALITY: Germany. DISTRIBUTION: Massachusetts, New York, New Jersey, Michigan, Illinois, Kentucky, North Carolina, Florida; Alaska. Puate 5.f. 57. 40. Bulbochaete reticulata Nordst. Oefv. Sv. Vet.-Akad. Foérh. 344:32. 1877. Bulbochaete insignis var. reticulata Hirn, Acta Soc. Sci. Fenn. 27: 365. 1900. Dioecious, nannandrous, gynandrosporous; oogonium ellipsoid, erect, below androspor- angium or terminal seta or vegetative cell; outer wall of oospore reticulate-dentate, with doubly dentate, occasionally anastomosing, longitudinal ridges, the teeth united to each other by transverse ridges; androsporangia epigynous or scattered, 1—-?; dwarf male on oogonium, antheridium exterior; vegetative cell 20-25 by 40-87 4; oogonium 44-52 by 66-85 uw; oospore 42-50 by 64-83 u; androsporangium 16-19 by 13-23 w; dwarf male stipe 17-20 by 30-33 4; antheridium 11-13 by 6-9 yp. TYPE LOCALITY: Sweden. DISTRIBUTION: Massachusetts, Illinois, Alabama. Puate 5. f. $2. 41. Bulbochaete alpina Taft, Bull. Torrey Club 62: 281. 1935. Dioecious, nannandrous, idioandrosporous; oogonium depressed-globose, patent, below terminal seta; oospore of the same form as the oogonium, middle spore-wall scrobiculate, pits angular, concentrically arranged; division of the suffultory cell median; androsporangia 1-3, epigynous; dwarf male on the oogonium, curved; antheridium 1, exterior; vegetative cell Part 1, 1937] OEDOGONIACEAE 15 20-30 by 53-106 x; oogonium 59 by 53-56 y; oospore 58 by 51-54 »; androsporangium 17~20 by 13-17 4; dwarf male stipe 10-11 by 36-46 mu; antheridium 10-11 by 15-17 yu. TyPE LOCALITY: Oklahoma. DistRiBUTION: Oklahoma. Puate 4. f. 35, 36. 42. Bulbochaete areolata Taft, Bull. Torrey Club 62: 282. 1935. Dioecious, nannandrous, gynandrosporous; oogonium ellipsoid, patent to erect, below the androsporangium, terminal seta, or vegetative cell; oospore ellipsoid; outer spore-wall deeply areolate with sharp points at the angles of the areolations (in section deeply undulate); division of the suffultory cell supreme; androsporangia 1-4, epigynous; dwarf male slightly curved, on the vegetative cell, antheridia 1-3, exterior; vegetative cell 15-20 by 20-46 un; oogonium 33-36 by 53-63 uw; oospore 31-35 by 52-59 uw; androsporangium 20-26 by 17~23 4; dwarf male stipe 13-15 by 23-25 yw; antheridium 7-10 by 47 y. TYPE LOCALITY: Oklahoma. DISTRIBUTION: Oklahoma. PLATE 6. f. 55,5 43. Bulbochaete praereticulata Jao, Rhodora 38:71. 1936. Dioecious, nannandrous, idioandrosporous; oogonium depressed-globose or rarely de- pressed-ovoid-globose, patent, below terminal seta; division of suffultory cell median; outer wall of oospore reticulate-scrobiculate; androsporangia 1-7; dwarf male shorter than and on oogonium or on suffultory cell; antheridium interior; stipe about twice as long as antheridium, curved; vegetative cell (except basal cell), oogonium, and androsporangium spirally punctate; vegetative cell 16—26(—29) by 48-93 u; oogonium 54-58 by 41-54 yu; oospore 52-56 by 40~-52 yu; androsporangium 16-19 by 6-104; dwarf male stipe 9-10 by 30-33 yw; antheridium 9-10 by 13-16 pw. TYPE LOCALITY: Woods Hole, Massachusetts. DistTRIBUTION: Massachusetts. PLATE 4. f, 38, 39, 44, Bulbochaete spinosa Wailes, Mus. Notes Vance. 5: 108. 1930. Vegetative cells, with hairs 2 » long and uniformly distributed, 15-30 by 48-80 »; oogonium (immature) also spinose, 26 by 39 u. Type LOCALITY: Munday Lake, British Columbia. DISTRIBUTION: Washington; British Columbia. PiatE 36. f. 554 2. OEDOCLADIUM Stahl, Jahrb. Wiss. Bot. 23: 340. 1891. Terrestrial or aquatic, branching, rhizoidal; if terrestrial, partly subterranean and sub- hyaline, partly above ground and green; vegetative cell cylindric or nearly so; growth chiefly by division of terminal cell of a filament or branch; asexual reproduction by “‘akinete” and zoospore; oogonium arising by simple division of a vegetative cell; sexual reproduction both monoecious and dioecious, nannandrous. Types species, Oedocladium Protonema Stahl. Oogonium operculate. 1. O. operculatum. Oogonium poriferous. Monoecious, terrestrial. ; Oospore smooth. 2. O. medium. Oospore angulate. Pore median. Vegetative cell 7 by 20 w O. Protonema. Vegetative cel! 12- 8 i 56-88 Be 2. O. medium. Pore inferior. ace Oogonium 50-60 by 50-63 hu. 3. O. Wettsteinii. Oogonium 90 by 95 u 4.0. albemarlense. 5. O. Hasenii. Dioecious-nannandrous, sae 16 NORTH AMERICAN FLORA (VOLUME 11 1. Oedocladium operculatum Tiff. Brittonia 2: 165. 1936. Monoecious; oogonium single (rarely in twos), often terminal, ellipsoid or oviform- ellipsoid, with supreme operculum small and often deciduous; oospore broadly ellipsoid, filling oogonium,; spore-wall of three layers, the outer spore-wall smooth, the middle scrobiculate, the inner wall smooth; antheridium single or in groups of 2-4, hypogynous or subhypogynous or scattered, sperm single; terminal cell obtuse and capped; vegetative cell 8-13 by 48-175 n; oogonium 18-34 by 32-50 u; oospore 16~32 by 30-40 »; antheridium 8-12 by 8-15 pz. TYPE LOCALITY: Puerto Rico. DISTRIBUTION: Puerto Rico. PuateE 6. f. 58, 59, 2. Oedocladium medium I. F. Lewis; Tiff. Oedog. Monog. 52. 1930. Monoecious; oogonium single, mostly terminal, globose to subglobose, with conic apex (if terminal); pore median; oospore globose, not quite filling oogonium; spore-wall with middle layer angulate or smooth; antheridia 1 or 2; terminal cell with conic apex; vegetative cell 12~18 by 56-78 yw; rhizoidal cell 10 by (up to) 270 »; oogonium 52 by 52 uw; oospore 44 by 44 4; antheridium 15 by 9-15 yu. TyPg# LOCALITY: Woods Hole, Massachusetts. DISTRIBUTION: Massachusetts. PLATE 6. f. 63-65. 3. Oedocladium Wettsteinii E. Knapp, Ber. Deuts. Bot. Ges. 51: 40. 1933. Monoecious; oogonium single, generally terminal, globose, apically conic; pore inferior; oospore globose, filling oogonium; outer spore-wall smooth, the middle angulate (in optical section undulate), the wall smooth; antheridium to 15-celled; terminal cell apically conic; vegetative cell subcylindric, the superterraneous 30 by 30-1004, the subterraneous 4-8 by (up to) 300 »; oogonium 50~60 by 50-63 »; oospore 50-56 by 50-56 uw; antheridium 15-20 by 8-20 pz. TYPE LocaLity: Sanford, Florida. DISTRIBUTION: Florida. PrLate 6. f. 60-62. 4. Oedocladium albemariense I. F. Lewis ; Collins, Tufts Coll. Stud. 47:71. 1918. Monoecious; oogonium single, mostly terminal, subglobose with conic apex (if terminal); pore inferior; oospore globose, not filling oogonium; spore-wall of three layers, the outer smooth, the middle angulate (in optical section undulate), the inner smooth; antheridium to 9-seriate; vegetative cell subcylindric; terminal cell with conic apex; vegetative cell 25-40 by 50-150 yw; thizoidal cell 4-10 by (up to) 350 #; oogonium 90 by 95 4; oospore 69 by 69 uw; antheridium 20-25 by 8-19 yw; zoospore 32-50 pu. TYPE LOCALITY: Near Charlottesville, Virginia. DISTRIBUTION: Virginia. PLATE 6. f. 66-69. 5. Oedocladium Hazenii I. F. Lewis; Tiff. Oedog. Monog, 52. 1930. Dioecious, nannandrous, gynandrosporous; oogonium globose to subglobose, terminal or intercalary; pore inferior; oospore globose, not or nearly filling oogonium; spore-wall with middle layer angulate; androsporangia 1 or 2, epigynous, subepigynous, or scattered; dwarf male curved or erect, on suffultory cell or more rarely on oogonium; antheridium exterior, single; Part 1, 1937] OEDOGONIACEAE 17 vegetative cell 15-26 by 47-132 y; rhizoidal cell 4 by (up to) 425 »; oogonium 50-75 by 50-75 p; oospore 45-55 by 45-55 wu; androsporangium 16 by 7-12 »; dwarf male stipe 18-22 by 7-10 yu; antheridium 6-8 by 6-7 u. TYPE LocaLiry: New Jersey. DISTRIBUTION: New Jersey. PuatE 7. f. 70-78. : 3. OEDOGONIUM Link, Horae Phys. Berol. 5. 1820. Prolifera Vaucher, Hist. Conf. 118, 129. 1803. Vesiculifera Hassall, Hist. Brit. Freshw. Algae 195. 1845. Cymatonema Kittz. Sp. Alg. 375. 1849. Pringsheimia H.C. Wood, Fresb-w. Algae N. Am. 195. 1873. Androgynia H. C. Wood, Fresh-w. Algae N. Am. 196. 1873. Filaments single, unbranched; vegetative cells cylindric or sometimes capitellate, nodu- lose, or undulate; basal cell with holdfast; terminal cell obtuse, apiculate, or hyaline; all vegeta- tive cells except the basal one capable of division; oogonia and antheridia produced by direct division of vegetative cells; other characters as in the family. Type species, Oedogonium grande Kiitz. . Nore: In the text which follows, the terms oogonium, antheridium, and androsporangium, or their plurals, followed by one or more numbers, indicate groups of oogonia, antheridia, and andro- sporangia respectively. Vegetative cell cylindric or nearly so. Vegetative cell granulate or punctate. I, Vegetative cell neither granulate nor punctate. Without dwarf males. Oogonium opening by a pore. Pore median. II. Pore supramedian (rarely varying to superior). Iil. Pore superior. IV. Pore supreme. Vv. Oogonium opening by a lid. VI. With dwarf males. VII. Vegetative cell subhexagonal or ellipsoid. VIII. Vegetative cell undulate or nodulose. IX. Vegetative cell distinctly capitellate. xX. I Vegetative cell densely and minutely granulate. O. elegans. Vegetative cell spirally punctate. Monoecious. 1. O. curtum. Dioecious, macrandrous. 2. O. punctatosiriatum. Il Wall of oospore smooth. Monoecious. : Diameter of oogonium 18-29 p. Filament irregularly curved. 3. O. curvum. Filament straight. Oogonium 18-24 by 18-26 pu. 4. O. vulgare. Oogonium 24-29 by 26-31 yw. 5. O. cryptoporum. Diameter of oogonium 32-38 pu. 6. O. laeve. Dioecious. Diameter of oogonium 22-27 pu. 7. O. rufescens. Diameter of oogonium 27-32 yu. Oogonium depressed-globose. O. calcareum., Oogonium globose. O. calcareum var. africanum. Diameter of oogonium 30-39 x. ; Oospore 28-35 by 28-35 pu. 8. O. sociale. Oospore caraa by 28-32 p. O. inerme. Wall of oospore scrobiculate. . Diseciods: 9. O. Magnusii. Monoecious. Oogonium 20-24 y» in diameter. O. cymatosporum var. chungkingense. Oogonium 24-27 u in diameter. 9. O. Magnusii. Oogonium 30-40 yw in diameter. 10. O. cymatosporum. Wall of oospore echinate. : Diameter of vegetative cell 9-14 yw. 11. O. suecicum. Diameter of vegetative cell 14-16 yz. 12. O. australe. Wall of oospore areolate. 13. O. areoliferum. 18 NORTH AMERICAN FLORA III Wall of oospore echinate. Wall of oospore scrobiculate. Oogonium 23-33 » in diameter. Oogonium 44-52 uw in diameter Wall of oospore smooth. Monoecious. Pore a little above median. Diameter of oogonium 34-45 yp. Oospore depressed-globose. Oospore regularly globose. Diameter of oogonium 46-55 yu. Pore nearly superior. Oospore 31-41 by 30-41 pu. Oospore 40-48 by 40-48 xz. Pore variable between median and superior. Terminal cell narrowed and often setiferous. Terminal cell neither narrowed nor setiferous. Dioecious. Pore a little above median. Vegetative cell J-3 diameters long. Vegetative cell 3-7 diameters long. Pore nearly superior. Diameter of vegetative cell 8-12 y. Diameter of vegetative cell 12-16 pw. Diameter of vegetative cell 14-30 u. Oospore depressed-globose, 28-43 w in diameter. Oospore subglobose, 42—49 yw in diameter. Oospore globose, 43-58 y in diameter. Oospore eflipsoid-globose, 40-52 « in diameter Pore variable between median and superior. Oospore not filling oogonium, Oospore completely filling oogonium. IV Wall of oospore echinate. Wall of oospore punctate. Wall of oospore smooth. Piants monoecious. Diameter of vegetative cell 8-34 pw. Diameter of oogonium 32-36 (40) p. Vegetative cell 8-14 » in diameter. Oogonium 42-46 p long. Oospore 28-31 » in diameter. Oospore 30-37 yp in diameter. Oogonium about 53 y long. Vegetative cell 15-18 » in diameter. Diameter of oogonium 36-63 p. Mature filament usually of 6-10 cells. Mature filament usually of 10-20 cells. Mature filament usually of more than 20 cells. Oospore globose to subglobose. Diameter of vegetative cell 12-19 yu. Oospore completely filling oogonium. Oogonium 38-45 by 40-50 yu. Oogonium 42-50 by 44-55 u. Oospore not filling oogonium. Vegetative cell 10-15 u in diameter. Vegetative cell 17-19 uw in diameter. Diameter of vegetative cell 19-34 nu, Oogonium usually globose. Oogonium usually ovoid. Oogonium usually obovoid. Oospore obovoid to ellipsoid. Oogonium basally inflated. Oogonium not basally inflated. Oospore 35-43 p in diameter. Division of antheridium vertical. Division of antheridium horizontal. Oospore 42-47 yin diameter. Oospore 46-53 w in diameter. Diameter of vegetative cell 33-37 yu. Diameter of vegetative cell 37-54 u. 18. 19. 20. 21. 18. 22. 23. 20¢. 26. 27. 28. 29. jale) jaro) eo 9999 e cso 9 900 oooo9o 99 98 999 o 999 99006 [VOLUME 11 . Santurcense. . moniliforme. . argenteum var. michiganense. . obsoletum. . plusiosporum. urbicum. varians. tyrolicum. inflatum. urbicum, . cardiacum f. pulchellum. . cardiacum. . Franklinianum,. . varians, Lemmermannii. . glabrum. . cardiacum f. interjectum. . cardiacum var. carbonicum. . inflatum. . lautumniarum. - Santurcense. . paraguayense. Hirnii. . globosum. . Warmingianum. . intermedium. . Zigzag. . curium. . fragile var. abyssinicum. . fragile, . intermedium var. szechwanense. . fennicum, . robusium. Vaucherii. . brevicingulatum. pseudo-Boscii. . Sodiroanum. . Richterianum. . upsaliense. . oviforme. . martinicense. Part 1, 1937] OEDOGONIACEAE Diameter of oogonium 53-67 yu. Oogonium rectangular in optical section, _ Oogonium obovoid to obovoid-globose. Diameter of oogonium 70-95 p. Plants dioecious. Diameter of vegetative cell 11-14,n. Oogonium 30-36 » in diameter. _ Oogonium about 43 by 75 yu. Diameter of vegetative cell 14-70 y. Oogonium scarcely exceeding vegetative cel! in diameter. Oospore globose to subglobose. Oospore globose to cylindric-globose or subcylindric. Oospore ovoid to broadly ellipsoid. Oogonium noticeably exceeding vegetative cell in diameter. Oospore globose, subglobose, or cylindric-globose. Antheridial filament of same diameter as oogonial filament. Oogonium 36~42 4 in diameter. Oogonium 42—49 » in diameter. Oogonium 54-63 » in diameter. Vegetative cell 16-26 by 112-250 u. Vegetative cell 33-43 by 40-155 yp. Antheridial filament smaller than oogonial filament. Oogonium 36-56 uw in diameter. Division of antheridium vertical. Division of antheridium horizontal. Vegetative cell of male filament 18-33 4 in diameter. Oospore usually cylindric-globose. Oospore usually globose to subglobose. Oogonium 40-53 by 40-65 py. Oogonium 46-56 by 52-66 nu. Oogonium 37~53 by 43-60 u. Vegetative cell of male filament 33-40 yu in diameter. Oogonium 55-65 uw in diameter. Oogonium 70-85 uw in diameter. Oospore ellipsoid, obovoid, subcylindric, or subellipsoid. Diameter of oogonium 35-63 (68) yu. Antheridial filament larger than oogoniai filament. Antheridial filament not larger than oogonial filament. Vegetative cell 1-3 diameters long. Oospore 35-65 yu long. Oospore 63-80 » long. Vegetative cell 2~—6 diameters long. Cell-diameter of antheridial filament 18- Oogonium usually obovoid. Oogonium usually subobovoid. Cell-diameter of antheridial filament 28- Be Cell-diameter of antheridial filament 32- Me Cell-diameter of antheridial filament 42— 53 ue. Vegetative cell 3-11 diameters long. Division of antheridium horizontal. Division of antheridium vertical. Oogonium usually obovoid. Oogonium usually cylindric-obovoid. Oogonium usually subobovoid or ellip- soid-ovoid. Diameter of oogonium 42-52 p. Diameter of oogonium 49-68 yu. Diameter of vegetative cell 20- 27. Diameter of vegetative cell 28- Me Diameter of vegetative cell 36— 46 mw. Diameter of oogonium (60) 63-904. Oospore not filling oogonium longitudinally. Oospore not filling oogonium in any direction. 37. 38. 46. 49, 41. 50. Sla. 45. Sl. 52. 20e. 33. 45. 54. 51. 52. 48. sees9080 sf 9 9 . suboctangulare. . geniculatum. . Kurzii. . lageniforme. herjedalicum. . anomalum., capillare. Stephensiae. gracilius., plagiostomum., glabrum. . princeps. biforme. capilliforme. capilliforme var. Loreniziz. capilliforme f. Debaryanum. capilliforme var. australe, . diversum. anomalum, rivulare. pachyandrium, . capillare. mexicanum, . grande var. aequatoriale. . biforme. grande, majus Stephensiae. cardiacum . var. carbonicum, oboviforme. . biforme. . angusium., grande f. gemelliparum. grande. majus. Stephensiae. . rivulare. 19 20 NORTH AMERICAN FLORA Oospore nearly or quite filling oogonium, Vegetative cell 1-6 diameters long. Diameter of antheridial filament 30-37 pu. Oospore obovoid tc ellipsoid. 55. Oospore ellipsoid to globose-ellipsoid. 56. Diameter of antheridial filament 36-50 yu. Oospore 67-100 y long. | Diameter of oogonium 64-73 pu. 55a. Diameter of oogonium 75-90 yp. Vegetative cell 1-3 diameters ng. 57. Vegetative cell 3-5 diameters long. Oospore 100-125 yu long. 58. Vegetative cell 6-10 diameters long. 59. Diameter of oogonium 98-100 yu. Oospore variable, globose to ellipsoid. 56. Diameter of vegetative cell 70-93 u. Oospore globose to ellipsoid. 60. Oospore subglobose to subcylindric. Plants with reproductive structures imperfectly known. Diameter of vegetative cell 6—24 (27) yu. Oogonium about 35 by 53 u. Oogonium about 43 by 75 u. Oogonium 37-49 by 54-76 uw. Diameter of vegetative cell 2440 yz. 228. Wall! of oospore longitudinally costate. Oospore with outer wall costate. 61. Oospore with middle wall costate. Costae continuous and entire. Costae 15-22 in number. Vegetative cell 10-15 u in diameter. Monoecious. 62, Dioecious. Vegetative cell 24-30 uw in diameter. Costae 26-35 in number. Monoecious. Oospore completely filling oogonium. Oogonium 39-48 y in diameter. 63. Oogonium 54-63 yw in diameter. 64. Oospore not filling oogonium. 63a, Dioecious. Oospore usually completely filling oogonium. Oospore usually not filling oogonium. Oospore ellipsoid. Diameter of oogonium 31-38 yz. 65. Diameter of oogonium 39-51 yu. 66. Oospore ellipsoid-globose to subglobose. 66a. Oospore cllipsoid-obovoid to ohovoid. Costae 35-45 in number. Costae granulate, crenate, crenulate, or pitted. Costae 12-20 in number. Costae crenulate. 67. Costae crenate. 68. Costae 30-35 in number. Costae 35—45 in number. Costae dentate. Costae connected by transverse ridges. 69. Costae not connected by transverse ridges. 68. Wall of oospore areolate. Dioecious. Diameter of oogonium 30-35 pu. 69. Diameter of oogonium 48-60 u. 70. Diameter of oogonium 66-72 yu. Monoecious. Oogonium 31-35 py in diameter. dls Oogonium 41-55 » in diameter. 84. Wall of oospore reticulate. Oogonium 33-40 by 38-46 u. 72. Oogonium about 42 by 52 p. Wall of oospore pitted or scrobiculate. Monoecious. Outer spore-wall scrobiculate. 73. _ Middle spore-wall scrobiculate. Dioecious. ooo Oo 90090 -) joka) eo 9999 9 96 29990 99 9999 29 99 999 [VoLUME 11 . Landsboroughi. . crassum. . Landsboroughi var. norvegicum. . amplum. « CYaSSUM var. sublumidum. longum. . subrectum, . columbianum, . crassum, fabulosum. maximum. . Warmingianum, . herjedalicum. . inflatum, . Oryzae. . exocostatum., . paulense. . orientale. . urceolatum. . paludosum. . carolinianum, . paludosum var. parvisporum. . leiopleurum. . occidentale. Boscii. . Boscii f. dispar. — Boscit var. notabile. Kjellmanii. crenulatocostatum. longiarticulatum. margaritiferum. Kjelimanii. aureum. longiarticulatum. aureum. areolatum. Hoehnei. . subareolatum. arcyosporum. . dictyosporum. . dictyosporum f. Westit. . foveolatum. . excavalum, Part 1, 1937] OEDOGONIACEAE Diameter of vegetative cell 10-25 (28) uw. Suffultory cell enlarged. Diameter of oogonium 40-48 yu. 74. Diameter of oogonium 56-68 yz. 75. Diameter of oogonium 64-76 p. 76. Suffultory cell not enlarged. Diameter of oogonium 38-45 yu. 77. Diameter of oogonium 44-64 p. Length of oogonium 48-65 pz. Outer spore-wall scrobiculate. 78. Middle spore-wall scrobiculate. 79, Length of oogonium 68-112 pu. 80. Diameter of oogonium 61-73 yu. Suffultory cell variable, enlarged or not. 81 Diameter of vegetative cell 25-48 yp. Length of oogonium 48-70 yu. 82 Length of oogonium 81-113 pu. 83 Reproductive structures imperfectly known. Oogonium 35-38 by 53-58 yw. Oogonium 53-69 by 67-106 uw. 235 Vv Oospore smooth. 39, Oospore scrobiculate. Oogonium 48-56 » in diameter. 79. Oogonium 61-73 p» in diameter. VI Wall of oospore echinate. Wall of oospore scrobiculate. Wall of oospore punctate-granulate. l15e. Wall of oospore coarsely reticulate. 85. Wall of oospore longitudinally costate. Division of oogonium supreme. 86. Division of oogonium superior. Costae 15-28 in number. Diameter of oogonium 38-48 x. Dioecious. Monoecious. 87. Diameter of oogonium 48-52 yu. 88. Diameter of oogonium 54-60 pz. 89. Diameter of oogonium 59-74 wu. Costae 30-50 in number. Antheridium and oogonium in same filament. Oospore 48-55 by 59-58 u. 90. Oospore 54-59 by 68-80 uv. 90a Oospore 65-75 by 88-104 pu. Antheridium and oogonium in separate filaments. Antheridium unknown. Wall of oospore smooth. Oogonium with median plications. Oogonium with projections. Projections mammiform. 91. Projections conically obtuse. Diameter of vegetative cell 5-7 u. Diameter of vegetative cell 8-10 zu. . . 92. Projections intermediate between mammiform and conically obtuse. Oogonium with neither projections nor plications. Oogonium with a median constriction. 227. Oogonium without a median constriction. Division of oogonium basal. Monoecious. 93 Dioecious. Diameter of oogonium 27-36 pu. 94. Diameter of oogonium 40-48 yu. 95, Division of oogonium inferior. 96. Division of oogonium median. Oogonium 13-20 yp in diameter. Oogonium 13-18 by 18-23 pw. 236. Oogonium 14-15 by 31-35 pn. Oogonium 15-19 by 18-23 u. 231. Oogonium 20-40 uw in diameter. Monoecious. of Oospore 22-27 « in diameter. Oospore 28-33 pw in diameter. o00 90 © 900 © 99 99999 eo © 899 9 999050 99999 200 oo 9 90 21 . scrobiculatum, . VerYUCOSUM. . Tiffanyt. punctatum, argenteum. fguraltum, Wyliet. Ilsteri. indianense. americanum, . taphrosporum. . capense. . giganteum. . lageniforme. figuratum. Llsteri. . velaium. acmandrium var. stictospermum. . crispum var. granulosum, . reticulocostatum. . pseudacros porum, . costatosporum. . eviense. . paucostriatum, . paucocostaium. . australianum. . nobile, . nobile var. minus, . insigne. . tumidulum. sol. excisum. mammiferum, . Lizigsohnii var. minus. . Lizigsohnit. . Itzigsohnii {. heteromorphum. . pusillum. . Brittonii. . Howe. . infimum. . inversum . inconspicuum. fusum. , tapeinosporum, . Gunnii. 22 NORTH AMERICAN FLORA Oogonium subglobose. Oogonium pyriform-globose. Dicecious. Diameter of oogonium 23-33 yu. Diameter of oogonium 33-40 pu. Antheridium unknown. Division of oogonium supramedian. Monoecious. Dioecious. Antheridium unknown. Oogonium 15-20 by 15-23 p. Oogonium 27-28 by 26-28 pu. Division of oogonium superior. Plants dioecious. Diameter of oogonium 13-16 nu. Diameter of oogonium 16-43 u. Oospore globose to depressed-globose. Diameter of oogonium 18-27 zu. Diameter of oogonium 28-36 yp. Oogonium 26-38 yu long. Oogonium 36—45 pw long. Diameter of oogonium 35-43 yu. Oospore ovoid, oblong, or ellipsoid. Diameter of oogonium 16-20 p. Diameter of oogonium 23-29 pu. Oospore filling oogonium longitudinally. Basal cell elongate. Basal cell subhemispheric. Oospore not filling oogonium longitudinally. Diameter of oogonium 28-33 yp. Diameter of oogonium 33-45 pz. Diameter of cogonium 43-50 zu. Diameter of oogonium 52-60 zu. Diameter of oogonium 61-68 pu. Diameter of oogonium about 82 yu. Plants monoecious. Oogonium pyriform to subpyriform. Diameter of vegetative cell 8-13 yu. Diameter of oogonium 23-33 yu. Oospore globose or ellipsoid. Oospore filling oogonium. Oospore not filling oogonium. Oospore subglobose to depressed-globose. Oogonium 23-28 by 23-40 yp. Oogonium 30-33 by 31-35 yu. Diameter of oogonium 34-40 pz. Diameter of vegetative cell 13-16 yu. Oogonium obovoid-globose to subglobose. Vegetative cell 8-16 » in diameter. Oospore filling oogonium. Diameter of oogonium 23-28 yu. Diameter of oogonium 30-50 uz. Oospore not filling oogonium. Diameter of oogonium 30-38 u. Diameter of oogonium 40-43 pu. Vegetative cell 16-27 u in diameter. Oogonium 39-45 yw in diameter. Oogonium 45-58 w in diameter. Oogonium ellipsoid to oblong. Oogonium 9-14 uw in diameter. Oogonium 13-19 » in diameter. Length of oogonium 25-28 yu. Length of oogonium 34-40 yz, Oogonium 20-29 u in diameter. Oospore nearly or quite filling oogonium. Vegetative cell 7-9 by 11-36 u. Vegetative cell 8-15 by 16-60 u. Oospore not filling oogonium longitudinally. Oospore globose. Oospore ellipsoid. Oospore oblong-ellipsoid. Oospore variable, filling oogonium or not. Oogonium 35-42 u in diameter. Oogonium 50-70 « in diameter. 98. 99. 100. 101. 234, 102. 229. 102. 103. 104a. 104. 105. 106. 107. 108. 230. 109. 110. 2 2999 99 jexe) 22 SO E99 SO o 9 9909 S999 99999 (VOLUME 11 acmandrium, psaegmatosporum. Howardii. praiensé, poecilosporum. Petri. mitratum. . virceburgense. . consociatum. trioicum. . milratum, . abbrevialtum. . Pringsheimii var. Nordstedtit. Pringsheimii. epiphyticum, pisanum, nanum. porrectum. Sancti-thomae. porrectum var. africanum, Welwitschii. iowense. peipingense. dioicum. Pithophorae. simplex. . loricatum, pyrulum. amplius. . pyriforme. . loricatum. . crispum. 115d. O. crispum 116. 117, 118. 119. 120. 121. 122. 123. 124. oo 9 99 9 29 S 999 99 var, hawaiense. . obesum. autumnale. . rupestre. . Selandiae. . trioicum, . gracillimum, . oblongellum, Kirchneri. Hallasiae. oblongum. gracillimum 1. majus. oblongum var. fusiforme. Ahlstrandii. . pachydermum. Part 1, 1937] OEDOGONIACEAE VII Oogonium opening by a pore. Pore inferior. Oospore costate. Oospore echinate. Oospore dentate. Oogonium 39-46 by 40~47 yu. Oogonium 47-60 by 48-63 pu. Pore inframedian. Wall of oospore smooth. Wall of oospore reticulate-verrucose. Wall of oospore echinate. Oogonium 38-45 yp long. Oogonium 52-64 u long. Pore median or nearly so. Wall of oospore reticulate-verrucose. Wall of oospore punctate. Wall of oospore echinate. Suffultory cell enlarged. Suffultory cell not enlarged, or only slightly so. Diameter of vegetative cell 7-13 yu. Diameter of vegetative cell 12-16 yw. Diameter of vegetative cell 17-30 wu. Oogonium 36-38 4 in diameter. Oogonium 38-50 uw in diameter. Oospore globose. Oospore ellipsoid. Wall of oospore spirally costate. Suffultory cell enlarged. Outer spore-wall granulate. Outer spore-wall not granulate. Oogonium 40-44 » in diameter. Oogonium 42-50 p» in diameter. Oogonium 49-60 « in diameter. Suffultory cell not enlarged. Diameter of oospore 35-45 ys. Vegetative cell 14-20 » in diameter. Vegetative cell 20-26 » in diameter. Diameter of oospore 46-56 p. Wall of oospore smooth. Oospore globose to subglobose. Vegetative cell 8-9 » in diameter. Vegetative cell 9-12 uy in diameter. Vegetative cell 12-23 » in diameter. Diameter of oogonium 23-30 yp. Diameter of oogonium 30-37 pu. Diameter of oogonium 39-48 yz. Diameter of oogonium 49-52 yp. Oospore ovoid. Oospore sexangular-ellipsoid. Oogonium 19-30 p» in diameter. Oogonium 29-33 » in diameter. Oogonium 36-42 » in diameter. Pore supramedian. Oospore-wall punctate. Oospore-wall spirally costate. Oospore-wall smooth. Oogonium 40-43 by 33-38 yu. Oogonium 94-98 by 146-150 u. Oospore-wall echinate. Vegetative cell 6-8 » in diameter. Vegetative cell 14-17 u in diameter. Pore superior. Oospore-wall dentate. Oospore-wall costate. Costae arranged spirally. Costae arranged longitudinally. Costae 16-25 in number. Oogonium 45-50 uw in diameter. Oogonium 48-65 w in diameter. Oospore usually completely filling oogonium. Oogonium 48-57 » in diameter. Oogonium 57-66 uw in diameter. Oospore incompletely filling oogonium. Oogonium 65-85 « in diameter. Costae 25-35 in number 149. 226. 152. 1520. 153. 25 5 98 S 9S SS 99 SO SO e090 9 2 9 99 99 SS SSS 9999 8 SS 999 je) 9 oo 9 23 Huntii. hispidum. . exoticum. Cleveanum. gallicum. fuscum. . inframediale. . canadense. fuscum. . nebraskense. . hystricinum, Aster. pungens. subglobosum. . echinospermum. Aystrix. Spiripennatum. . exospirale. . Spiralidens. . illinoiense. pseudospirale. acutum. . spirale. . depressum. . semiapertum, Braunii var. hafniense. Braunii. gallicum. flavescens. Zehneri. angulosum. sexangulare. subsexangulare. nebraskense. . latviense. . magnum. . SINENSE. . excentriporum. . manschuricum. . Stellatum. . latviense. . incertum, . cyathigerum var. hormosporuim. . cyathigerum. . cyaihigerum var. elliplicum. . perfectum. 24 NORTH AMERICAN FLORA Costae entire. Costae crenulate. Costae 35-40 in number. Oospore-wall echinate. Spines arranged spirally. Oogonium 51-64 w in diameter. Oogonium 63-78 » in diameter. Dwarf male stipe 11-15 by 50-65 yp. Dwarf male stipe 16-21 by 63-74 nu. Spines not arranged spirally. Diameter of oogonium 29-38 p. Diameter of oogonium 35-36 p. Diameter of oogonium 46-57 yp. Oospore-wall pitted. Pits in both verticai and transverse rows. Pits in vertical rows only, in concentric rings, or irregularly arranged, Oospore-wall smooth. Suffultory cell enlarged. Diameter of oogonium 33-65 (68) u. Oospore 28 by 28 pu. Oospore 30-46 by 37-60 pz. Oospore 49-65 by 49-81 yp. Diameter of oogonium 65-80 pu. Suffultory cell 26-40 » in diameter. Suffultory cell about 44 » in diameter. Suffultory cell not enlarged. Diameter of vegetative cell 10-20 yu. Oogonium 24-35 p in diameter. Oogonium 35-45 » in diameter. Diameter of vegetative cell 21-40 yu. Oogonium 39-60 u in diameter. Vegetative cell 1-3 diameters long. Oospore not filling oogonium. Oospore nearly or quite filling oogonium. Vegetative cell 3-6 diameters long. Gynandrosporous. Tdioandrosporous. Oogonium 65-80 uw in diameter. Oogonium opening by a lid. Division of oogonium inframedian. Oogonium without folds. Oogonium with folds. Suffultory cell enlarged. Diameter of oogonium 23-26 yu. Diameter of oogonium 28-32 p. Suffultory cell not enlarged. Oogonium 16-23 yu in diameter. Oogonium 23-29 uw in diameter. Division of oogonium median. Oogonium longitudinally plicate. Diameter of oogonium 16-18 pu. Diameter of oogonium 25-27 pu. Oogonium not longitudinally plicate. Oogonium 13-16 u in diameter. Oogonium 16-20 » in diameter. Oogonium 21-26 » in diameter. Oogonium 25-31 4 in diameter. Gynandrosporous. Idioandrosporous. Oogonium 30-38 p in diameter Oogonium 39-46 uv in diameter. Oogonium 89-100 uw in diameter. Division of oogonium supramedian. Oogonium with verticillate folds. Diameter of oogonium 23-28 yu. Diameter of oogonium 50-55 yu. Diameter of oogonium 58-65 u. Oogonium without verticillate folds. Vegetative cell 4-7 uw in diameter. _ . , Vegetative cell 13-24 u in diameter. Division of oogonium superior. Oospore-wall crenulate. 154. 154a. 155. 150. 156. 157. 158. 159. 160. 161. 162. 163. 164. 165. 166. 166. 167. 168. 169. 170. 171. 1720. 172. 173. 174. 175. 0. oO. 0. So 9090 20 jote) oo 9 9 999 8S DO e909 6 89 ODD OO 2 99 999 [VOLUME 11 Wolleanum, Wolleanum var. concinnum, strictum, . stellatum. . Donnellii var. Wiltrockianum, . Donnellii, armigerum. echinatum, Lindmantanum: . rectangulare. concatenatum. . Silvaticum. . Borisianum, . Westii. . alleynans, . Kitutae. . multisporum, irregulare. . victoriense. . crassiusculum. . crassiusculum, . idioandrosporum. . alternans. . contortum. . pulchrum. . platygynum var. continuum. . Lagerstedtii. . Uleanum. . crenulatum var. gracilius. . crenulatum. longicolle. senegalense. Rothii. decipiens var. bernardense. . decipiens var. africanum, . decipiens. . macros permum. . perspicuum. plicatulum., costatum., boreale. . danicum, mirandrium. . rugulosum var. minuium. Part 1, 1937] OEDOGONIACEAE Oospore-wall pitted. Oospore-wall echinate. Oospore-wall longitudinally costate. Oospore-wall scrobiculate. Diameter of oogonium 30-39 u. Suffultory cell enlarged. Suffultory cell not enlarged. Diameter of oogonium 40-50 pz. Suffultory cell 27-28 uw in diameter. Suffultory cell 35-38 y in diameter. Diameter of cogonium 56-68 pu. Oospore-wall smooth. Vegetative cell 3—8 » in diameter. Diameter of oogonium 14-20 u. Oospore 17~20 u long. Oospore 19-25 pu long. Diameter of cogonium 19-23 pu. Vegetative cell 8-32 u in diameter. Oospore globose or subgiobose. Suffultory cell enlarged. Diameter of vegetative cell 9-15 py. Diameter of vegetative cell 13-20 yp. Suffultory cell not enlarged. Vegetative cell $ to 2} diameters long. Diameter of vegetative cell 12-14 uw. Diameter of vegetative cell 14-21 yp. Diameter of vegetative cell 21-29 y. Vegetative cell 2-8 diameters long. Oospore 24-37 by 24-39 u. Oospore 35-40 by 36-45 yp. Oospore ellipsoid, subellipsoid, or ovoid. Terminal cell setiform. Terminal cell not setiform. Diameter of vegetative cell 7-12 yp. Diameter of vegetative cell 14-32 yw. Oospore 27~32 wu in diameter. Oospore 32-42 uw in diameter. Vegetative cell 3 diameters long or less. Oogonium globose-obovoid. Oogonium subglobose. Vegetative cell 3-5 diameters long. Oospore 41-48 yw in diameter. Division of oogonium supreme. Oospore-wall smooth. Diameter of oogonium 42-55 yu. Diameter of oogonium 55-85 yu. Oospore-wall longitudinally costate. Costae 11-30 in number. Costae 40-45 in number. VII One species only. IX Dwarf male present. Oogonium 42-56 p in diameter. Oogonium 56-68 y in diameter. Dwarf male absent. Diameter of oogonium 18-23 yu. Diameter of oogonium 48-57 yu. Diameter of oogonium 64-74 pz. Vegetative cell punctate or granulate. Diameter of vegetative cell 4-8 x. Diameter of vegetative cell 9-13 uw. Diameter of vegetative cell 16-24 p. Vegetative cell neither punctate nor granulate. Dwarf male absent. Dioecious, macrandrous. Divsion of oogonium basal. Oogonium 27-36 pu in diameter. Oogonium 40-48 y in diameter. Division of oogonium inferior. Division of oogonium median. Oogonium 26-32 yw in diameter. Oogonium 32-36 uw in diameter. Division of oogonium superior. 176. 177. 178. 179. 180. 175. 175a. 181. ee ees So 99 Schmidlet. velatum. Croasdaleae. monile. Ackleyae. exmonile. Bor gei. eminens. longatum. . rugulosum, . rugulosum var. rolundatum. hians, mirandrium. . laetevirens. macrandrium f. lundense. . pluviale. macrandrium, acuminatum, . cilialum, . flexuosum, fonticola. pluviale. implexum. spectabile. obtruncatum. completum. acrosporum. tentoriale. Reinschii. undulatum, sinuatum. nodulosum. commune. elegans var. americanum. minus. spirostriatum. Howe. infimum. inversum. Howardii. . latiusculum. . hoersholmiense. Sphaerandrium. 25 26 NORTH AMERICAN FLORA Oospore smooth, 11-20 by 13-17 p. Oospore scrobiculate, 54-67 by 54-67 yu. Monoecious. Oogonium opening by a pore. Oogonium opening by a lid. Diameter of oogonium 15-30 pz. Division of oogonium median. Oogonium subdepressed-globose. Oogonium angular-globose. Division of oogonium supramedian. Diameter of oogonium 15-20 p. Diameter of oogonium 18-23 pz. Diameter of oogonium 26-30 yp. Diameter of oogonium 30-46 pu. Division of oogonium basal. Division of oogonium superior. Oogonium 30-33 4 in diameter. Oogonium 42-45 » in diameter. Dwarf male present. Oogonium opening by a pore. Wall of oospore punctate. Wall of oospore longitudinally costate. Wall of oospore smooth. Oogonium opening by a lid. Division of oogonium median. Oogonium with narrow division. Oogonium 28-35 by 23-38 wu. Oogonium 46-64 by 44-54 pw. Oogonium 57~64 by 48-53 yp. Oogonium with wide division. Diameter of oospore 22-26 pu, Gynandrosporous only. Gynandrosporous and idioandrosporous. Diameter of oospore 26-30 pu. Diameter of oospore 30-32 pw. Diameter of oospore 42-48 yp. Vegetative cell 14-19 » in diameter. Vegetative cell 19-26 uw in diameter. Diameter of oospore 48-53 yu. Division of oogonium supramedian. Diameter of oogonium 14—26 yu. Diameter of oogonium 27—42 yu. Oogonium 19-25 yu long. Oogonium 25-32 » long. Oogonium 40-45 » long. Diameter of oogonitum 42-55 p. Oospore 33-43 » in diameter. Oogonium with 10-16 longitudinal folds. Oogonium with 16-22 longitudinal folds. Oospore 48-53 u in diameter. Diameter of oogonium 58-65 pu. Division of oogonium inframedian. Suffultory cell enlarged. Suffultory cell not enlarged (or only rarely so). Diameter of vegetative cell 3-6 u. Diameter of vegetative cell 6-10 uw. Gynandrosporous only. Idioandrosporous only. Gynandrosporous and idioandrosporous, Diameter of vegetative cell 10-13 uy. Diameter of vegetative cell 12-15 u. Division of oogonium superior. Oogonium 35-43 u in diameter. Oogonium 43-55 uw in diameter. Oospore 36—40 » long. Oospore 44-58 y long. Division of oogonium supreme. Oospore-wall longitudinally costate. Oospore-wall smooth. Idioandrosporous. Oogonium 48-60 by 62-74 u. Oogonium 66-78 by 72-90 yu. Gynandrosporous. 224, 199. 200. 172¢. 205. 206. 205a. 207. 208. 209, 210. 211. 212. 2}la. 213, 174. 214. 215. 216. 217. 218. 219, 220. 221. 222. o 989 eo 9 999 99 200 jaye) 29 999 © S89 S S88 9 999 o 99 9 ss9 9 8 OS [VOLUME 11 . operculatum. . suborbiculare. . patulum, . capitellaium. . quadratum. virceburgense. Sphaerandrium. spurium. . Brittonii. . ouchitanum, . bohemicum. . nebraskense. Taylorii. . Borisianum. . decipiens var. dissimile. . bengalense. . indicum, . Areschougii. subplenum. Areschougii var. contortifilum. pseudoplenum. bengalense. confertum. brasiliense. . clavalum. exosividium. . oelandicum. megaporum. . oelandicum var. novae-angliae. Jaoii. costatum. boreale. plaitygynum var. continuum. . civcinatum. . plaiygynum var. novae-zelandiae. . plaiygynum f. obtusum. plaiygynum. ambiceps. bahusiense. rigidum. Taftii. . Collinsit. . michiganense. . praticolum. . SUpremum. Part 1, 1937] OEDOGONIACEAE 27 Diameter of oogonium 36-42 yu. 223. O. wabashense. Diameter of oogonium 42-55 yu. 187. O. obtruncatum. . Diameter of oogonium 55-58 pu. 225. O. completum. Reproductive structures imperfectly known. Vegetative cell 2-3 u in diameter. O. fusum, Vegetative cell 4-6 » in diameter. O. virceburgense. 1. Oedogonium curtum Wittr. & Lundell; Wittr. Oefv. Sv. Vet.-Akad. Férh. 27: 121. 1870. Monoecious; oogonia 1-4, obovoid-globose or subglobose, pore superior: oospore of same form as oogonium, which it nearly fills; spore-wall smooth, often thick; suffultory cell occasion- ally larger than vegetative cell; antheridia 1-4, subepigynous, sometimes terminal; sperms 2, division horizontal; basal cell elongate; vegetative cell sometimes spirally punctate, 12-22 by 25-110 w; oogonium 38-55 by 37-54 u; oospore 36-52 by 35-51 yw; antheridium 10-17 by 8-13 g. TYPE LOCALITY: Sweden. DISTRIBUTION: Michigan, Wyoming. Puate 9, f. 115. 2. Oedogonium punctatostriatum De Bary, Abh. Senck. Nat. Ges. 1:47. 1854. Dioecious, macrandrous; oogonium 1, depressed-globose, operculate; division med/‘an, rather wide and distinct; oospore depressed-globose, not filling oogonium; spore-wall smooth; antheridia to 10-seriate; sperm 1; wall of vegetative cell and oogonium spirally punctate; basal cell depressed-globose or subhemispheric, its wall vertically plicate; female vegetative cell 18-22 by 38-128 w, male 16-19 by 33-108 un; oogonium 48-55 by 38-48 uw; oospore 40-51 by 35-42 u: antheridium 16-19 by 6-12 u; basal cell 28-31 by 21-25 yp. TyPs LOCALITY: Europe. DIsTRIBUTION: Michigan, Illinois, Iowa, Florida; British Columbia; Greenland. PLATE 23. f, 364, 365. 3. Oedogonium curvum Pringsh. Jahrb. Wiss. Bot. 1:69. 1857. Monoecious: oogonia 1-6, depressed-globose, pore median; oospore depressed-globose, filling or not filling oogonium; spore-wall smooth; antheridia hypogynous or epigynous or scattered, 1-7; sperm 1; basal cell elongate; filament usually irregularly curved; vegetative cell 5-10 by 10-404; cogonium 21-25 by 18-24 u; oospore 19-23 by 14-19 4; antheridium 6-9 by 6-9 pz. TYPE LOcALIty: Germany. DistRisuTION: Indiana, Illinois, Iowa, Alabama. PLATE 8. f. 89, 90. 4, Oedogonium vulgare (Wittr.) Tiff. Ohio Jour. Sci. 34: 324. 1934. Oedogonium cryptoporum var. vulgare Wittr. Nova Acta Soc. Sci, Upsal. IIT. 99:7. 1874. (2?) Oedogonium spetsbergense Wittr. Nova Acta Soc. Sci. Upsal. IIT. 93:37. 1874. Monoecious; oogonia 1-5, subdepressed-obovoid-globose or subdepressed-globose, pore median; oospore subdepressed-globose, quite filling oogonium; spore-wall smooth; antheridia 1-4, subepigynous or hypogynous or scattered; sperm single; vegetative cell 5-8 by 15-48 nu; oogonium 18-25 by 18-26 »; oospore 16-23 by 15-19 »; antheridium 5-7 by 9-12 x. Type LocaLity: Europe. : a a DISTRIBUTION: Massachusetts, New Jersey, Pennsylvania, Michigan, Illinois, Oklahoma, Utah. PLATE 8. f. 103. 5. Oedogonium cryptoporum Wittr. Oefv. Sv. Vet.-Akad. Foérh. 27: 119. 1870. Monoecious; oogonium 1, subdepressed-obovoid-globose or subdepressed-globose, pore median; oospore subdepressed-globose, quite filling oogonium; spore-wall smooth; antheridia 28 NORTH AMERICAN FLORA [VOLUME 11 1-7, scattered or subhypogynous or subepigynous; sperm 1; vegetative cell 7-10 by 28-60 z; oogonium 23-29 by 25-31 4; oospore 20-27 by 19-22 4; antheridium 6-8 by 7-11 u. TYPE LOCALITY: Europe. ee a : DISTRIBUTION: Massachusetts, Ohio, Indiana, Michigan, I!inois, Iowa, Oklahoma, Wyoming, Utah. PuLate 8. f. 104. 6. Oedogonium laeve Wittr. Nova Acta Soc. Sci. Upsal. III. 93: 8. 1874. Monoecious; oogonium single, depressed-globose, pore median; oospore depressed-globose, filling oogonium; spore-wall smooth; antheridia 1-2, subepigynous; sperm 1; vegetative cell 10-14 by 20-70 pw; oogonium 32-38 by 24-30 u; oospore 30-35 by 23-26 »; antheridium 9-10 by 9-13 yp. Type LocaLity: France. DISTRIBUTION: Michigan, Illinois. Puate 8. f. 99. 7. Oedogonium rufescens Wittr. Oefv. Sv. Vet.-Akad. Forh. 27: 134. 1870. Dioecious, macrandrous; oogonia 1-3, obovoid- or depressed-obovoid-globose, pore median, rimiform; oospore globose or depressed-globose, filling oogonium or nearly so; spore-wall smooth; antheridia to 12-seriate; sperm 1; female vegetative cell 8-10 by 34-70 u, male 7-9 by 30-54 uw; oogonium 22-24 by 22-30 yw; oospore 21-23 by 17-22 yw; antheridium 6-8 by 8-12 p. TYPE LOCALITY: Sweden. DIsTRIBUTION: Rhode Island, Connecticut, Ohio, Michigan, Indiana, Illinois, Iowa, Missouri, North Carolina, Florida, Alabama, Oklahoma. PriaTE 8. f. 100-102. 7a. Oedogonium rufescens var. exiguum (Elfv.) Tiff. Oedog. Monog. 66. 1930. Oedogonium exiguum Elfv.; Hirn, Acta Soc. Faun. Fl. Fenn. 116: 19. 1895. Oedogonium rufescens f. exiguum Hirn, Acta Soc. Sci. Fenn. 27: 76. 1900. Vegetative cell a little smaller; oospore subdepressed- globose; antheridia 3; vegetative cell 5-9 by 22-88 »; oogonium 22-24 by 20-28 yu; oospore 20-22 by 17-23 »; antheridium 5 by 10-124. Typr Locatrry: Finland. DisTRiBuTion: Illinois, Alabama, Mississippi, Oklahoma. PLaTE 8. f. 105. 7b. Oedogonium rufescens var. Lundellii (Wittr.) Tiff. Ohio Jour. Sci. 29:75. 1929. Oedogo- nium Lundellii Wittr. Nova Acta Soc. Sci. Upsal. III. 93: 32. 1874. Oedogonium rufescens subsp. Lundellii Hirn, Acta Soc. Sci. Fenn. 27: 77. 1900. Oedogonium rufescens subsp. Lundellit f. elongatum Hirn, Acta Soc. Sci. Fenn. 27: 78. 1900. Vegetative cell wider in proportion to oogo- nium than in the species; oogonium depressed-globose; vegetative cell 9-13 by 30-75 2; oogonium 22-25 by 21-27 »; oospore 19-23 by 15-22 y; antheridium 7-9 by 6-12 ». TyprE Locatity: Sweden. DISTRIBUTION: Maine, California. PLate 8. f. 106, 107. 8. Oedogonium sociale Wittr.; Wittr. & Nordst. Algae Exsicc. 401. 1882; Bot. Notiser 1882: 54. 1882. Oedogonium ochroleucum Kiitz.; Rab. Alg. Eur. 1280. 1862. Dioecious, macrandrous; oogonium 1, subglobose, pore median; oospore globose (or sub- globose), quite filling oogonium; spore-wall smooth; antheridia 1-5; sperms 2, division horizon- tal; vegetative cell 9-16 by 30-130 4; oogonium 30-38 by 33-42 »; oospore (26~) 28-35 by 28-35 u; antheridium 12-14 by 8-11 uz. TYPE LOCALITY: Sweden. DisTRIBUTION: Illinois, Alabama, Mississippi; British Columbia. PLATE 8. f. 95, 96. 9. Oedogonium Magnusii Wittr. Nova Acta Soc. Sci. Upsal. TTI. 93: 38. 1874. Dioecious, macrandrous (perhaps sometimes monoecious); oogonia 1-3, depressed-globose, pore median, rimiform; oospore depressed-globose, quite filling oogonium; spore-wall of three layers, the outer smooth, the middle scrobiculate, the inner smooth; antheridia to 8-seriate; Part 1, 1937] OEDOGONIACEAE 29 sperm 1; vegetative cell 7-10 by 12-40 u; oogonium 24-27 by 21-26 pn; oospore 22-25 by 18-23 yw; antheridium 8-10 by 5-11 np. TYPE LocaLiry: Germany. DisTRIBUTION: Massachusetts, Michigan, Illinois; British Columbia. PLATE 8. f. 86. 10. Oedogonium cymatosporum Wittr. & Nordst.; Wittr. Oefv. sv. Vet.-Akad. Férh. 27: 121. 1870. Oe en Magnusii Hirn, Acta Soc. Faun. Fl. Fenn. 116: 21. 1895. Not O. Magnusii Wittr. Monoecious; oogonium 1 or rarely 2, subdepressed-globose, pore median, rimiform; oospore depressed-globose, filling or not filling oogonium; spore-wall of three layers, the outer smooth, the middle scrobiculate, the inner smooth; antheridia 1-4, subepigynous, subhypog- ynous, hypogynous, or scattered; sperm 1; vegetative cell 6-11 by 32-70»; oogonium 30-40 by 27-40 4; oospore 27~35 by 22-33 yp; antheridium 7-10 by 9-15 nu. TyPE LocaLity: Sweden. DISTRIBUTION: Massachusetts, Mississippi. Puate 8. f. 85. 11. Oedogonium suecicum Wittr. Bot. Notiser 1872: 6. 1872. Dioecious, macrandrous; oogonium 1, subglobose, pore median; oospore globose, nearly filling oogonium; outer spore-wall echinate, inner smooth; antheridia 2-6; sperm 1; basal cell elongate; terminal cell apically obtuse; vegetative cell 9-14 by 30-90 »; oogonium 32-38 by 34-41 »; oospore 30-37 by 30-37 wv; antheridium 10-12 by 13-17 us. TYPE LOCALITY: Sweden. DIstRIBUTION: Maine, Massachusetts, Indiana, Michigan, Illinois, North Carolina, Alabama, Wyoming; British Columbia. Pate 8. f. 93. 12. Oedogonium australe (G. West) Tiff. Ohio Jour. Sci. 34: 324. 1934. Oedogonium suecicum f. australe G. West, Jour. Linn. Soc. 39:45. 1909. Oedogonium suecicum var. ausirale B. H. Smith, Proc. Ind. Acad. 41: 193. 1932. Dioecious, macrandrous; oogonium 1, subglobose to nearly globose, pore median; oospore globose, nearly filling oogonium; outer wall shortly and sparsely echinate, inner wall smooth; antheridia 1~2; vegetative cell 14-16 by 56-80 yu; oogonium 40-42 by 40-42 y; oospore (without spines) 31-33 by 31-33 w; antheridium 14-15 by 15-16 n. TYPE Loca.ity: Australia. DISTRIBUTION: Indiana, North Carolina, Oklahoma. PLATE 8. f. 94. 13. Oedogonium areoliferum (Jao) Tiffany, sp. nov. Oedogonium cymatosporum var. areoliferum Jao, Rhodora 36: 203. 1934. Monoecious: oogonium solitary, depressed-globose, pore median, rimiform; oospore similar in form to the oogonium and filling it; spore-wall of three layers, the outer and inner smooth, the middle areolate; antheridia 4-7, subepigynous, subhypogynous, or scattered; sperm single; terminal cell obtuse; vegetative cell 6-10 by 25-64 »; oogonium 28-32 by 25-41 y; oospore 25-29 by 19-27 w;.antheridium 6-10 by 6-10 x. TypE LocaLity: Woods Hole, Massachusetts. DISTRIBUTION: Massachusetts. PLate 8. f. 88; 36. f. 558. 30 NORTH AMERICAN FLORA (VoLUME 11 14. Oedogonium santurcense Tiff. Brittonia 2: 168. 1936. Dioecious, macrandrous; oogonium single, globose or broadly ellipsoid, pore supramedian or superior; oospore of the same form as the cogonium and filling it or not; outer spore-wall echinate; antheridium single; vegetative cell 6-9 (-16) by 20-70 u; suffultory cell 8-16 by 35- 55 uj oogonium 25-30 by 32-42; oospore 22-26 by 22-30y; antheridium 6-8 by 7-104; basal cell 7-10 by 30-40 yp. Type LOCALITY: Santurce, Puerto Rico, DisTRIBUTION: Puerto Rico. PLATE 8. f. 91, 92. 15. Oedogonium moniliforme Wittr. Nova Acta Soc. Sci. Upsal. III. 93:40. 1874; Tiff. Trans. Am. Micr. Soc. 55:5, char. emend. 1936. Dioecious, macrandrous; oogonia 1-5, pyriform to globose-ovoid, pore supramedian (sometimes nearly superior); oospore globose or subdepressed-globose, not filling the oogonium, at least longitudinally; middle layer of spore-wall scrobiculate; antheridia 1-5; terminal cell apically obtuse; vegetative cell 9-13 by 30-72 «x; oogonium 23-33 by 28-42 y; oospore 22-32 by 22-32 yw; antheridium 10-12 by 8-134. TYPE LOCALITY: Sweden. DIstTRIBUTION: Ohio, Michigan. Priate 8. f. 87. 16. Oedogonium obsoletum Wittr. Nova Acta Soc. Sci. Upsal. III. 93:9. 1874. Oedogonium vernale Wittr. Bot. Notiser 1872: 1. 1872. Not O. vernale Hassall. 1843. Monoecious; oogonium 1, subglobose or subdepressed-globose, pore a little above median; oospore subdepressed-globose, not filling oogonium; spore-wall smooth; antheridia 1-3, sub- epigynous; sperm 1; vegetative cell 9-15 by 30-75 »; oogonium 34-39 by 34-43 uw: oospore 30-34 by 28-32 uw; antheridium 8-9 by 12-16 un. TYPE LOCALITY: Sweden. DISTRIBUTION: Pennsylvania, PLATE 9. f. 117. 17. Oedogonium plusiosporum Wittr. Nova Acta Soc. Sci. Upsal. ITT. 93:11. 1874. Monoecious; oogonium 1, subglobose or subellipsoid-globose, with pore a little above median; oospore globose, rarely subglobose, not quite filling oogonium; spore-wall smooth; antheridia to 6-seriate; sperm 1 (?); terminal cell obtuse; vegetative cell 12-19 by 24-77 n; oogonium (28-) 34-45 by 35-504; oospore (25-) 30-39 by 30-39 nu; antheridium 12-14 by 8-12 yp. TYPE LOCALITY: Sweden. DiIsTRIBUTION: New Jersey, Pennsylvania, Wisconsin, Wyoming, California; British Columbia. PLATE 8. f. 97, 98. 18. Oedogonium varians Wittr. & Lundell; Wittr. Nova Acta Soc. Sci. Upsal. ITT. 93: 11. 1874. Oedogonium polymorphum Wolle, Fresh-w. Algae U.S. 73. 1887. Monoecious (or sometimes dioecious); oogonium 1, or rarely more, depressed- or subde- pressed-pyriform-globose, pore supramedian or nearly superior; oospore globose, not filling oogonium; spore-wall smooth; antheridia to 9-seriate, scattered; sperms 2, division horizontal; basal cell elongate; terminal cell apically obtuse; vegetative cell 12-16 by 35-144 «4; oogonium 34-50 by 34-55 yw; oospore 31-41 by 30-41 4; antheridium 11-15 by 5-7 pz. TYPE LOCALITY: Sweden. DISTRIBUTION: New Jersey, Ohio, Indiana, Michigan, Illinois. Iowa. PLATE 9. f. 114. Part 1, 1937] OEDOGONIACEAE 31 19. Oedogonium tyrolicum Wittr. Nova Acta Soc. Sci. Upsal. IIT. 99:12. 1874. Monoecious; oogonium 1 (rarely 2), ellipsoid-globose or occasionally obovoid, pore supra- median, rarely superior; oospore usually globose, not filling oogonium; spore-wall smooth; antheridia 1-4; sperms 2, division horizontal; basal cell elongate; terminal cell apically obtuse; vegetative cell 15-24 by 45-120 u; oogonium 45-53 by 57-70 u; oospore 40-48 by 40-48 yu; antheridium 12-21 by 9-11 yu. TYPE LOCALITY: Austria. DisTRIBUTION: Massachusetts, Iowa; Quebec. PLATE 9. f. 116, 20. Oedogonium cardiacum (Hassall) Wittr. Oefv. Sv. Vet.-Akad. Forh. 27: 135. 1870. Vesiculifera caydiaca Hassall, Hist. Brit. Fresh-w. Algae 1:203. 1845. ? Pringsheimia inaequalis H. C. Wood, Fresh-w. Algae N. Am. 195. 1873. Oedogonium lautumniarum Hirn, Oefv. Finska Vet.-Soc. Férh. 38:20. 1896. Not O. lautumniarum Wittr. 1877. Dioecious, macrandrous; oogonium usually 1, subglobose to subcordiform-globose, with a supramedian pore; oospore globose, not filling the oogonium; spore-wall smooth; antheridia 1-10; sperms 2, division horizontal; basal cell elongate; terminal cell apically obtuse; female vegetative cell 18-30 by 60-200 4, male 15~25 by 45-1704; oogonium 48-70 by 58-78 p; oospore 42-60 by 42-60 yw; antheridium 15-21 by 10-14 u. TYPE LOCALITY: Europe. DISTRIBUTION: Connecticut, Pennsylvania, Ohio, Michigan, Indiana, Tllinois, Iowa, Oklahoma, Washington, Oregon; Ontario; Puerto Rico. PLATE 9. f. 108. 20a. Oedogonium cardiacum var. carbonicum Wittr.; Wittr. & Nordst. Algae Exsicc. 504: 3. 1883; Bot. Notiser 1883: 148. 1883. Oedogonium carbonicum Wittr. Nova Acta Soc. Sci. Upsal. III. 93:33. 1874. Oogonia I or 2, obovoid to globose-ovoid, pore nearly superior; oospore-obovoid- ellipsoid to BODOG pects female vegetative cell 14-30 by 40-200 u, male 14—25 by 40-150 y; oogonium 42-56 by 50-80 x; oospore 40-52 by 46-65 uw; antheridium 13-20 by 12-15 4. Type LOCALITY: Britain and Denmark. D1stRiBpuT1oN: Ohio, Illinois, lowa, Oklahoma. PvLaTE 9.f. 121. 21. Oedogonium Franklinianum Wittr.; Wittr. & Nordst. Algae Exsice. 309. 1880; Bot. Notiser 1880: 116. 1880. Dioecious, macrandrous; oogonium 1, subglobose, with a supramedian to nearly superior pore; oospore globose, almost filling oogonium; spore-wall smooth; antheridia 1-4; sperms 2, division horizontal; female vegetative cell 8-12 by 30-95 u, male 8-10 by 25-90 u; oogonium 26-31 by 29-41 4; oospore 24-30 by 24-30 u; antheridium 8-9 by 3-7 pz. TYPE LOCALITY: New Jersey. DIstTRIBUTION: New Jersey, Pennsylvania, Illinois, Iowa, Florida; British Columbia. Puate 8. f. 84. 22. Oedogonium Lemmermannii Tiff. Ohio Jour. Sci. 34: 324, 1934. Oedogonium cardiacum var. minus Lemmerm. Arch. Hydrobiol. 4: 191. 1909. Dioecious, macrandrous; oogonitim usually 1, subglobose, pore supramedian; oospore globose, not filling oogonium; spore-wall smooth; antheridia 1-6; sperms 2, division horizontal ; female vegetative cell 16-28 by 25-75 u, male 14-23 by 25-75 »; oogonium 30-45 (-50) by 35-59 uw; oospore 28-43 by 28-42 uw; antheridium 12-15 by 5-6 yu. TyPE LOCALITY: Germany. : DistRIBUTION: Kentucky, Iowa, Oklahoma; Puerto Rico. PLaTte 9. f. 113. 23. Oedogonium glabrum Hallas, Bot. Tidssk. 26: 408. 1905. Dioecious, macrandrous; oogonium | (rarely 2), obovoid, pore superior; oospore globose or subglobose, not filling oogonium; spore-wall smooth; antheridia 5-8; sperms 2, division vertical; 32 NORTH AMERICAN FLORA [Volume 11 terminal cell (sometimes the oogonium) broadly apiculate; female vegetative cell 16-26 by 120-240 w, male 21-25 by 60-150 u; oogonium 56-58 by 63-86 4; oospore 42-49 by 44-63 un; antheridium 20-22 by 7-9 yz. TYPE LocaLity: Denmark. DIsTRiBurTIoN: Florida. PLATE 9. f. 111, 112. 24, Oedogonium lautumniarum Wittr.; Wittr. & Nordst. Algae Exsice. 7. 1877; Bot. Notiser 1877: 24. 1877. Dioecious, macrandrous; oogonium 1, rarely 2, subobovoid-globose, pore a little above median (rarely nearly superior); oospore subglobose, or sometimes subangular, filling oogonium; spore-wall smooth, rarely thickened; antheridia 1-4; female vegetative cell 16-22 by 40-110 u, male 15-20 by 45-100 uw; oogonium 40-49 by 45-51 4; oospore 36-46 by 35-47 uw; antheridium 14-17 by 7-10 pw. TYPE LOCALITY: Sweden. DISTRIBUTION: Michigan, Kentucky; British Columbia. PLate 9. f, 118. 25. Oedogonium Hirnii Gutw. Rozp. Akad. Umiej. If. 13:34. 1898. Moncecious; oogonium 1, subglobose or subobovoid, with superior pore; oospore globose, not filling oogonitum; spore-wall smooth; antheridia 1 or 2, subepigynous; sperms 2, division horizontal; vegetative cell (sometimes slightly capitellate) 8-13 by 28-80 »; oogonium 32-37 by 32-39 w; oospore 28-31 by 28-31 yw; antheridium 8—11 by 4-9 pz. TyPE LOCALITY: Austria. DisTRIBUTION: Indiana, Iowa, Kentucky. PLATE 9. f. 109. 26. Oedogonium globosum Nordst. Minneskr. Fys. Sallsk. Lund 7:20. 1878. Monoecious; oogonium 1, globose or subglobose, pore superior; oospore globose, quite filling oogonium; spore-wall smooth; antheridia 1-7, subepigynous or subhypogynous or scattered; sperms 2, division horizontal; basal cell elongate; terminal cell setiform; vegetative cell 10-14 by 40-95 »; oogonium 32-40 by 32-46 u; oospore 30-37 by 28-37 »; antheridium 9-12 by 4-8 uw. TYPE LOCALITY: Hawaii. DISTRIBUTION: Massachusetts, Michigan, Indiana, Illinois, Iowa. PLATE 9. f. 120, 27. Oedogonium intermedium Wittr.; Wittr. & Nordst. Algae Exsice. 708. 1886; Bot. Notiser 1886: 134. 1886; Hirn, Acta Soc. Sci. Fenn. 27: 94. 1900. Oedogonium Vaucherii Wittr. & Nordst. Algae Exsicc. 14. 1877. Not O. Vaucherii A. Br. 1855. Oedogonium fragile Wittr.; Wittr. & Nordst. Algae Exsicc. $02. 1882. Not O. fragile Wittr. 1870. Monoecious; oogonium 1, obovoid to obovoid-globose, pore superior; oospore globose or obovoid-globose, filling oogonium or nearly so; spore-wall smooth and thick; antheridia 1-4, epigynous or subepigymous or hypogynous or rarely scattered; sperms 2, division horizontal; vegetative cell 15-18 by 45-80 4; oogonium 31-37 by 34-45 #; OOspore 30-36 by 33-41 nu; antheridium 14-16 by 5-10 yu. ‘TYPE LOCALITY: Europe. DISTRIBUTION: Maine, Massachusetts, Ohio, Illinois, Iowa, Alab ississippi Missouri, Oklahoma; Puerto Rico. : ama, Mississippi, Kentucky, PLATE 9. f. 119. Part 1, 1937] OEDOGONIACEAE 33 28. Oedogonium fragile Wittr. Oefv. Sv. Vet.-Akad. Foérh. 27: 120. 1870. Oedogonium Candollei Bréb.; Mong. & Roum. Alg. Fr. 347. 1884. Monoecious; oogonium 1, globose or subobovoid-globose, with superior pore; oospore globose, filling oogonium; spore-wall smooth; antheridia 1-3; sperms 2, division horizontal; basal cell elongate; vegetative cell 12-17 by 50-120 #; oogonium 42-50 by 44-55 yu; oospore 39-46 by 39-46 »; antheridium 12-15 by 10-12 pn. TYPE LOCALITY: Sweden. . DIsTRIBUTION: Massachusetts, Pennsylvania, Ohio, Michigan, Illinois, Iowa, North Carolina, Mississippi, Wyoming; British Columbia. PuaTE 10. f. 132. 29. Oedogonium fennicum (Tiff.) Tiff. Ohio Jour. Sci. 34: 324. 1934, Ocedogonium intermedium ‘forma valida’’ Hirn, Acta Soc. Sci. Fenn. 27:95. 1900. Oedogonium intermedium var. fennicum Tiff. Ohio Jour. Sci. 29:74. 1929. Monoecious; oogonium 1, obovoid to obovoid-globose, pore superior; oospore globose or obovoid-globose, nearly filling oogonium; spore-wall smooth; antkeridia 1-4, subepigynous or hypogynous or rarely scattered; sperms 2, division horizontal; vegetative cell 17-19 by 50- 120 u; oogonium 38-46 by 42-60 4; oospore 35-40 by 35-40 pw; antheridium 13-18 by 6-8 pz. TYPE LocaLity: Finland. DistRIBUTION: Michigan, Alabama, PLATE 10. f. 131. 30. Oedogonium Vaucherii A. Br. Abh. Akad. Berlin 1855: 40. 1855; Wittr. Oefv. Sv. Vet.-Akad. 27: 121. 1870. ? Prolifera Vaucherii Le Clerc, Mém. Mus. Paris 3: 474. 1817. ? Oedogonium diandronites Carter, Ann. Mag. Nat. Hist. III. 1:31. 1858. ? Oedogonium monandronites Carter, Ann. Mag. Nat. Hist. III. 1:38. 1858. Oedogonium Vaucherii {. insulare Hirn, Acta Soc. Sci. Fenn. 27:99. 1900. Monoecious; oogonium 1, usually ovoid, pore superior; oospore globose to subglobose, not filling oogonium; spore-wall smooth and sometimes thick; antheridia 1-4; sperms 2, division horizontal; basal cell elongate; vegetative cell 20-30 by 32-118 »; oogonium 40-58 by 45-65 y; oospore 35-54 by 35-55 uw; antheridium 17-30 by 6-15 p. Type LOcALity: Europe. DISTRIBUTION: Massachusetts, Ohio, Indiana, Michigan, Illinois, Iowa, Mississippi. PLATE 10. f. 124, 125, 31. Oedogonium pseudo-Boscii Hirn, Acta Soc. Faun. Fl. Fenn. 11°: 21. 1895. Oedogonium neglectum Hirn, Acta Soc. Faun. Fl. Fenn, 116: f. 5. 1895. Monoecious; oogonium 1, subobovoid, pore superior; oospore ellipsoid-ovoid or ellipsoid, inflating lower part of oogonium, otherwise not filling it; spore-wall smooth; antheridia 1 or 2, subepigynous; sperms 2, division horizontal; vegetative cell 8-14 by 64-275 y; oogonium 41-50 by 75-105 u; oospore 38-45 by 48-60 uw; antheridium 11-12 by 10-11 uz. TYPE LOCALITY: Finland. DisTRIBUTION: Massachusetts, Illinois, Alabama. PLATE 10. f. 130. 32. Oedogonium Sodiroanum Lagerh. Anal. Univ. Ecuador 427, 81. 1890; Tiff. Oedog. Monog. 77. 1930. Monoecious; oogonium 1, ellipsoid-obovoid, pore superior; oospore ellipsoid, not filling oogonium at upper end; spore-wall smooth; antheridia subhypogynous or subepigynous or 34 NORTH AMERICAN FLORA [VoLuME 11 scattered, 1-9; sperms 2, division vertical; vegetative cell 20-24 by 44-84 »; oogonium 40-45 by 70-90 »; oospore 38-42 by 56-64 »; antheridium 20-22 by 6-8 x. Type LocaLity: Ecuador. DISTRIBUTION: Michigan, Indiana. Puate 10. f. 122, 123. 33. Oedogonium Richterianum Lemmerm. Forsch. Biol. Sta. Plén 3:26. 1895. Oedogonium paludosum Kiitz.; Hirn, Acta Soc. Faun. Fl. Fenn, 116: 14. 1895. Not O. paludosum Wittr. 1870. Monoecious; oogonia 1 or 2, obovoid or subellipsoid, pore superior; oospore subobovoid or subellipsoid (rarely globose-ellipsoid), filling oogonium or not; spore-wall smooth; antheridia 1-6, subhypogynous or subepigynous or scattered; sperms 2, division horizontal; basal cell elongate; vegetative cell 12-21 by 36-126 u; oogonium 36-48 by 48-74 4; oospore 35-43 by 43-59 yw; antheridium 12-15 by 6-10 x. TYPE LOCALITY: Germany. . DIsTRIBUTION: Massachusetts, Michigan, Indiana; British Columbia. PiatE 10. f. 128, 129. 34. Oedogonium upsaliense Wittr. Oefv. Sv. Vet.-Akad. Foérh. 27: 125. 1870. Cen tumidulum Aresch. Algae Scand. Exs. II. 236. 1864. Not O. tumidulum Pringsh. 1857, Monoecious; oogonium 1, obovoid or suboblong-ellipsoid, pore superior; oospore same form as and filling oogonium; spore-wall smooth; antheridia 1-3, subhypogynous; antheridium, oogonium, and vegetative cell alternating; sperms 2, division vertical; vegetative cell varying much in same filament; suffultory cell up to 27 wu in diameter; basal cell elongate; terminal cell obtuse; vegetative cell 13-20 by 55-160 »; oogonium 45-50 by 66-100 wu; oospore 42-47 by 60-75 uw; antheridium 15-18 by 7-10 up. TYPE LOCALITY: Sweden. DistRIBUTION: New Hampshire, Ohio, Michigan, Illinois; Greenland. PLATE 10. f. 133. 35. Oedogonium oviforme (Lewin) Hirn, Acta Soc. Sci. Fenn. 27: 116. 1900. Oedogonium urbicum var. oviforme Lewin, Bih. Sv. Vet.-Akad. Handl. 141: 17. 1888. Monoecious; oogonium 1, obovoid to ellipsoid-obovoid, pore superior; oospore obovoid to ovoid (rarely almost globose), filling or not filling the oogonium; spore-wall smooth, thick; antheridia 1-4, epigynous, hypogynous, or scattered; sperms 2, division vertical; basal cell elongate; vegetative cell 15-23 by 40-135 wu; oogonium 48-55 by (56—-) 65-80 u; oospore 46-53 by 50-63 »; antheridium 16-19 by 7-12 nu. TYP LOCALITY: Spain. DISTRIBUTION: Iowa. PLaTE 10. f. 137. 36. Oedogonium martinicense Hirn, Acta Soc. Sci. Fenn. 27: 134. 1900. Oedogonium crassum Wolle, Fresh-w. Alg. U.S.74. 1887. Not O. crassum Wittr. 1872. Monoecious; oogonium 1, obovoid or subobovoid, pore superior; oospore obovoid or obovoid-ellipsoid, quite filling oogonium; spore-wall smooth, often thick; antheridia 1-5, hypogynous; sperms 2, division vertical; vegetative cell 33-37 by 115-240 »; oogonium (63-) 68-74 by 96-125 wu; oospore 66-72 by 81-96 y; antheridium 33-35 by 5-7 u. TYPE LOCALITY: Martinique. DistrisuTiIon: Iowa, Missouri, Kansas; Martinique. PLATE 12.7. 164. Part 1, 1937] OEDOGONIACEAE 35 37. Oedogonium geniculatum Hirn, Erythea 6:21. 1898. Monoecious; oogonium 1, obovoid or obovoid-globose, pore superior; oospore globose or subdepressed-globose, not filling oogonium; spore-wall smooth and thick; antheridia 1-5, subepigynous or subhypogynous or scattered, sometimes alternating with vegetative cell; sperms 2 (?), division (?) horizontal; vegetative cell 37-48 by 60-135 »; oogonium 56-63 by 56-68 uw; oospore 48-59 by 48-59 uw; antheridium 37-44 by 5-9 yu. Tyre Locality: Berkeley, California. DIstRIBUTION: Ohio, California. PLATE 11.7. 138. 38. Oedogonium Kurzii G. Zeller, Jour. Asiatic Soc. Bengal 427: 189. 1873; Hedwigia 12: 189. 1873. Monoecious; oogonium 1, rarely in series, obovoid or subellipsoid, pore superior; oospore subglobose or ellipsoid, not filling oogonium; spore-wall smooth; antheridia hypogynous or scattered, to 15-seriate; sperms 2, division vertical; terminal cell apically obtuse; vegetative cell 44-52 by 90-250 »; oogonium 70-95 by 111-130 »; oospore 67-86 by 80-93 y; antheridium 44-52 by 6-16 yp. TYPE LOCALITY: India. DistRIBUTION: Pennsylvania, Indiana, North Carolina, Florida, Mississippi, Arkansas; Puerto Rico. PuatTE 12. f. 165. 39. Oedogonium lageniforme Hirn, Acta Soc. Sci. Fenn, 27: 291. 1900; ‘Tiff. Brittonia 2: 168. 1936. Dioecious, macrandrous; oogonium single, obpyriform (in optical section longitudinally trinodulose to undulate), with superior pore (sometimes nearly supreme); oospore globose to ellipsoid, occupying the lower inflated part of the oogonium or nearly filling it; spore-wall smooth; antheridium with single (?) sperm; vegetative cell 11-14 by 35-90 u; oogonium 30-36 by 42-63 u; oospore 28-31 by 31-40 w; antheridium 11-12 by 10-13 z. TYPE Locality: Brazil. Distriputrion: Alabama; Puerto Rico. PuaTE 10. f. 134-136. 40. Oedogonium anomalum Hirn, Acta Soc. Sci. Fenn. 27:112. 1900. Oedogonium stagnale var. variabile Lewin, Bih. Sv. Vet.-Akad. Handl. 141: 17, 1888. Dioecious, macrandrous; oogonium 1, subovoid or cylindric-ovoid, pore superior; oospore globose or subglobose, not filling oogonium, spore-wall smooth; antheridia 4-13; sperms 2, division vertical; terminal cell apically obtuse; female vegetative cell 40-50 by 80-300 n, male 33-42 by 80-240 «; oogonium 54-64 by 68-75 yu; oospore 48-60 by 52-61 »; antheridium 30-40 by 6-18 p. TyPE LocaLity: Spain. DISTRIBUTION: Iowa. Puate 12. f. 154-156. 41. Oedogonium capillare (L.) Kiitz. Phyc. Gen. 255. 1843; Tab. Phyc. 3:13. 1853. re rihadts eee iret ae ene Py Alg. Eur. 1470. 1863. Oedogonium stagnale Wittr. & Nordst. Algae Fxsicc. 504. 1883. Not O. siagnale Kiitz. 1849. Dioecious, macrandrous; oogonium 1, not or scarcely exceeding the vegetative cell in diameter, cylindric to subcylindric, pore superior; oospore globose to cylindric-globose to ovoid, not or completely filling oogonium; spore-wall smooth; antheridia 1-4, often alternating with vegetative cell; sperms 2, division horizontal; basal cell elongate, terminal cell broadly 36 NORTH AMERICAN FLORA [VOLUME 11 apiculate to obtuse; female vegetative cell 35~56 by 36~120 », male 35-50 by 35-90 yw; oogonium 40-60 by 45-75 »; oospore 30-52 by 35-65 wu; antheridium 30-48 by 5-10 u. TYPE LOCALITY: Europe. DIsTRIBUTION: Ohio, Michigan, Indiana, Iowa, Florida. PLATE 11. f. 151, 152. 4la. Oedogonium capillare f. stagnale (Kiitz.) Hirn, Acta Soc. Sci. Fenn. 27: 113. 1900. Oedogonium stagnale Kiitz. Sp. Alg. 368. 1849. Oospore subcylindric or cylindric-globose, some- times constricted at the middle, not filling oogonium; female vegetative cell 38~50 by 40-100 p; male 35-45 by 36-90 p; oogonium 40-60 by 55-75 y»; oospore 36-57 by 40-60 »; antheridium 33-42 by 5-9». Type Locanity: Germany. DISTRIBUTION: Ohio. PLatTE 11. f. 153. 42. Oedogonium gracilius (Wittr.) Tiff. Ohio Jour. Sci. 34: 324. 1934. Oedogonium plagiostomum var. gracilius Wittr. Bot. Notiser 1878: 142. 1878. Dioecious, macrandrous; oogonium 1, obovoid-globose, pore superior; oospore globose to subglobose, nearly filling oogonium; spore-wall smooth; basal cell elongate; vegetative cell 20-25 by 40-100 u; oogonium 36-42 by 46-57 uw; oospore 34-39 by 36-44 u; antheridium 19-22 by 7-10 pz. TYPE LOCALITY: Orizaba, Vera Cruz. DISTRIBUTION: New York, Ohio, Indiana, Illinois, lowa, North Carolina, Florida, Alabama, Mississippi, Kentucky, Oklahoma; Puerto Rico; Mexico. Puate 11. f. 143, 144. 43, Oedogonium plagiostomum Wittr. Nova Acta Soc. Sci. Upsal. ITT. 93:41. 1874. Oedogonium sp. Wittr. Bih. Sv. Vet.-Akad. Handl. 11:24. 1872. Dioecious, macrandrous; oogonium 1, obovoid-globose, with superior pore; oospore globose to subglobose, usually filling oogonium; spore-wall smooth and thick; antheridia 1-6, often alternating with vegetative cell; basal cell elongate; vegetative cell 22-27 by 65-120 ux; oogonium 42-49 by 50-60 uw; oospore 41-47 by 42-49 uw; antheridium 20—24 by 8-10 yu. TYPE LOCALITY: Sweden. DisTRIBUTION: Massachusetts, Ohio, Indiana, IIinois, Iowa, North Carolina, Florida, Mississippi. Prate 11. f. 141, 142. 44, Oedogonium princeps (Hassall) Wittr. Nova Acta Soc. Sci. Upsal. IIT. 99:42. 1874; Wu & Tilden, New Phytol. 29: 141. 1930. Vesiculifera princeps Hassall, Ann. Mag. Nat. Hist. 10: 388. 1843. Vesiculifera capillaris Hassall, Hist. Brit. Fresh-w. Algae 1:195. 1845. Dioecious, macrandrous; oogonium 1, little tumid, subobovoid, pore superior; oospore globose or subglobose, not filling oogonium; spore-wall smooth; terminal cell apiculate; an- theridia 1-7; sperms 2, division vertical; vegetative cell 33-43 by 40-155 »; oogonium 51-63 by 54-80 uw; oospore 47-58 by 47-65 yw; antheridium 32-38 by 5-20 np. TYPE LocaLity: England. DISTRIBUTION: Ohio, Indiana, Michigan, Minnesota, Mississippi, Oklahoma, California. PuLaTEe 11. f. 147-150. 45. Oedogonium biforme Nordst.; Wittr. & Nordst. Algae Exsice. 307. 1880; Bot. Notiser 1880: 116. 1880. Dioecious, macrandrous; oogonium 1 (rarely 2), pore superior, cylindric-obovoid to sub- obovoid; oospore oblong-ellipsoid to subglobose or nearly globose, generally not filling oogonium; spore-wall smooth; antheridia to 21-seriate; sperms 2, division vertical; female vegetative cell 22-32 by 55-140 u, male 18-28 by 45-140 u; oogonium 37-52 by 48-90 2; cospore 36-48 by 40-76 uw; antheridium 18-28 by 6-15 yu. TYPE LOCALITY: Brazil. DISTRIBUTION: Indiana, PLATE 10, f. 126, 127. Part 1, 1937] OEDOGONIACEAE 37 46. Oedogonium capilliforme Kiitz. Tab. Phyc. 3:12. 1853; Wittr. Bih. Sv. Vet.-Akad. Hand]. 11:21. 1872. Ocedogonium dioicum Petrovsky, Bull. Soc. Nat. Mosc. 34): 611. 1861. Dioecious, macrandrous; oogonium 1, obovoid to subovoid, with superior pore; oospore ovoid-globose, cylindric-globose, subglobose, or globose, not filling oogonium; spore-wall smooth; antheridia 2-8, often alternating with the vegetative cell; sperms 2, division horizontal; basal cell elongate, terminal cell apically obtuse or apiculate; female vegetative cell 28-38 by 42-120 p, male 25-30 by 40-100 u; oogonium 42-50 by 51-62 ; oospore 37-45 by 40-50 yu; antheridium 20-25 by 8~10 u. TYPE LOCALITY: Germany. DistRIBUTION: Ohio, Michigan, Indiana, Illinois, Iowa, Florida, Mississippi, Missouri, Utah; Puerto Rico. PLATE 12. f. 157, 158. 46a. Oedogonium capilliforme f. Debaryanum (Chmiel.) Hirn, Acta Soc. Sci. Fenn. 27: 108. 1900. Oedogonium Debaryanum Chmiel. Trudy Obshch. Ispyt. Prir. Khark. 23: 167. 1890. Oospore globose or subglobose; female vegetative cell 25-37 by 38-130 », male 22-27 by 35-100 pn; oogonium 46-56 by 52-66 »; oospore 38-50 by 40-53 »; antheridium 18-24 by 5-10». Tyre LOCALITY: Russia. DisTrR1BuTION: Iowa; Greenland. Piate 12. f. 159, 160 46b. Oedogonium capilliforme var, australe Wittr.; Wittr. & Nordst. Algae Exsicc. 704. 1886; Bot. Notiser 1886: 133. 1886. Oedogonium princeps Tilden, Am. Algae 4. 1894. Not O. princeps Wittr. 1874. Oedogonium capilliforme var. australe £. uberosporum Hirn, Acta Soc. Sci. Fenn. 27: 110. 1900. Oogonium obovoid-globose to subglobose; female vegetative cell 24-36 by 26-100 », male 22-33 by 40-100 »; oogonium 37-53 by 43-60 »; oospore 35-50 by 36-55 u; an- theridium 21-26 by 4-9 ». Type Locality: Uruguay. DisrriBuTION: New York, Indiana, Iowa, Minnesota, South Dakota, Nebraska, California; British Columbia; Mexico. PuaTe 12.f. 161-163. 47, Oedogonium diversum (Hirn) Tiff. Ohio Jour. Sci. 34:324. 1934. Oedogonium stagnale Tilden, Am. Algae 122. 1896. Not O. stagnale Kiitz. 1849. Oedogonium capilliforme var. australe f. diversum Hirn, Acta Soc. Sci. Fenn. 27: 110. 1900. Oedogonium capilliforme var. diversum Tiff. Ohio Jour. Sci. 29: 75. 9 Dioecious, macrandrous; oogonium 1, obovoid to subovoid, with superior pore; oospore ovoid-globose, subglobose, or globose, not filling oogonium; spore-wall smooth; antheridia 2-5; sperms 2, division horizontal; female vegetative cell 34-46 by 45-130 u, male 33-40 by 50-120 u; oogonium 46-56 by 46-70 «4; oospore 43-52 by 40-58 yu; antheridium 30-37 by 6-11 z. TYPE LOCALITY: Fort Collins, Colorado. DIstRIBUTION: Indiana, Iowa, Minnesota, Colorado, Montana. PLATE 12. f. 166, 167. 48. Oedogonium rivulare A. Br. Abh. Akad. Berlin 1855: 23. 1855. ? Prolifera rivularis Le Clerc, Mém. Mus. Paris 3: 472. 1817. Dioecious, macrandrous; oogonia 1-7, obovoid, pore superior; oospore obovoid, ellipsoid, or subglobose, not filling oogonium longitudinally; spore-wall smooth; antheridia to 13-seriate; sperms 2, division horizontal; basal cell elongate; female vegetative cell 35-45 by 110-350 x, male 30-36 by 120-280 u; oogonium 70-85 by 130-160 x; oospore 55-70 by 65-100 yw; antheri- dium 21-28 by 14-26 yn. TYPE LOCALITY: Europe DISTRIBUTION: Massachusetts, Indiana, Iowa, Florida. PuaTE 11.7. 139, 140. 49, Oedogonium pachyandrium Wittr.; Wittr. & Nordst. Algae Exsice. 5. 1877; Bot. Notiser 1877: 24. 1877. Dioecious, macrandrous; oogonia 1-3, subobovoid or obovoid-ellipsoid, pore superior; oospore ellipsoid, not filling oogonium (rarely inflating it); spore-wall smooth; antheridia 1-4; 38 NORTH AMERICAN FLORA [VoLuME 11 sperms 2, division vertical; female vegetative cell 30-36 by 80-220 u, male 32-45 by 60-160 p; oogonium 53-57 by 84-108 4; oospore 51-54 by 69-85 yu, antheridium 30-43 by 11-20 u. TYPE Locality: Sweden. DISTRIBUTION: Massachusetts, New Jersey, Pennsylvania, Kentucky. PLATE 13. f. 179-181. 50. Oedogonium mexicanum Wittr. Bot. Notiser 1878: 138. 1878. Dioecious, macrandrous; oogonium 1, cylindric-obovoid, pore superior; oospore cylindric- obovoid, quite or nearly filling oogonium; spore-wall smooth; antheridia to 8-seriate; sperms 2, division vertical; female vegetative cell 34-41 by 60-140 y, male 30-38 by 60-114 u; oogonium 53-63 by 76-110 4; oospore 51-60 by 63-80 y; antheridium 28-35 by 7-17 p. Tyre LOCALITY: Orizaba, Vera Cruz. DISTRIBUTION: Massachusetts, Michigan, Indiana, South Dakota, North Carolina, Oklahoma; Mexico. PLATE 11. f. 145, 146. 51. Oedogonium grande Kiitz. Phyc. Germ. 200. 1845. Dioecious, macrandrous; oogonia 1-5, subobovoid, pore superior; oospore of the same form as oogonium, which it completely fills or not; spore-wall smooth; antheridia 1-10; sperms 2, division vertical; basal cell elongate; female vegetative cell 28-37 by 70-210 », male 28-33 by 70-175 pw; oogonium 49-60 by 86-1104; oospore 47-58 by 60-94 2; antheridium 25-33 by 11-18 pw. TPE Loca.ity: Europe. DISTRIBUTION: Maine, Massachusetts, Connecticut, Pennsylvania, Ohio, Indiana, Michigan, Illinois, Minnesota, Mississippi, Oklahoma, Utah, California; Ontario; Puerto Rico. Pate 13. fe 172-174. 51a. Oedogonium grande var. aequatoriale Wittc.; Wittr. & Nordst. Algae Exsicc. 1016. 1893; Bot. Notiser 1893: 192. 1893. Oedogonium grande var. aequatoriale f, horiense Wittr.; Hirn, Acta Soc. Sci. Fenn. 27: 145. 1900. Not O. grande f. hortense Wittr. 1893. Male vegetative cell 22-28, female 26-33 by 70-165 u; oogonium 44-51 by 75-100 m ears 42-49 by 50-81 ». TyPE Locatity: Ecuador. DistRmuTion: Greenland. PLATE 13.f. 1 52. Oedogonium majus (Hansg.) Tiff. Ohio Jour. Sci. 34: 324, 1934. Oedogonium grande var. majus Hansg. Arch. Nat. Land. Béhmen 5°: 45. 1886. Oedogonium grande £. robustum Hirn, Acta Soc. Sci. Fenn. 27: 144. 1900. Oedogonium grande var. robustum Tiff. Ohio Jour. Sci. 24: 186. 1924. Dioecious, macrandrous; oogonia 1-3, subobovoid (sometimes nearly ellipsoid), pore supe- rior; oospore similar in shape to oogonium and usually filling it; spore-wall smooth; antheridia 1-5; sperms 2, division vertical; basal cell elongate; female vegetative cell 36-46 by 80-200 u, male 32-42 by 80-200 u; oogonium 52-68 by 75-90 yu; oospore 50-64 by 68-88 yw; antheridium 30-36 by 10-16 pz. TYPE LOCALITY: Bohemia. DISTRIBUTION: Massachusetts, Ohio, Indiana, Michigan, Illinois, lowa, North Carolina. PuateE 13. f. 170, 171. 53. Oedogonium oboviforme Wittr. Bot. Notiser 1878: 140. 1878. Dioecious, macrandrous; oogonium 1, obovoid, pore superior; oospore obovoid (rarely ellipsoid-obovoid), about filling oogonium; spore-wall smooth; antheridia to 19-seriate; sperms 2, division vertical; basal cell elongate; female vegetative cell 21-33 by 72-280 4, male 21-31 by 72-270 nw; oogonium 55-65 by (76-) 80-107 u; oospore 54-61 by 70-85 y; antheridium 21-28 by 5~13 p. TYPE LOcaALITy: Vera Cruz, Mexico. DisTRIBUTION: Oklahoma; Mexico. PiatE 13. f. 168, 169. Part 1, 1937] OEDOGONIACEAE 39 54. Oedogonium angustum (Hirn) Tiff. Ohio Jour. Sci. 34:324. 1934. Oedogonium grande var. angustum Hirn, Acta Soc. Sci. Fenn. 27: 146. 1900. Dioecious, macrandrous; oogonia 1-4, subobovoid, pore superior; oospore similar in shape to oogonium and nearly filling it; spore-wall smooth; antheridia to 36-seriate; sperms 2, division vertical; female vegetative cell 19-30 by 70-330 pn, male 19-25 by 80-225 u; oogonium 42-52 by 62-110 4; oospore 40-50 by 60-89 y; antheridium 18-22 by 7-15 yu. TYPE LOCALITY: Brazil. DisTRIBUTION: Maine, Massachusetts, Ohio, Michigan, Illinois, Alabama, Mississippi, Oklah Puate 13. f. 176-178. : cena ee 55. Oedogonium Landsboroughi (Hassall) Wittr. Nova Acta Soc. Sci. Upsal. ITI. 93: 35. 1874. Vesiculifera Landsboroughi Hassall, Ann. Mag. Nat. Hist. 10: 389. 1843. Ce gemelliparum Hantzsch; Rab. Alg. Eur. 1118. 1861. Not O. gemelliparum Pringsh. Oedogonium gemelliparum var. majus Wittr. Oefv. Sv. Vet.-Akad. Férh. 27: 137. 1870. Dioecious, macrandrous; oogonia 1 or 2 (rarely 3), obovoid to ovoid, pore superior; oospore ovoid to ellipsoid, filling or not filling the oogonium; spore-wall smooth; antheridia up to 30-seriate; sperms two, division vertical; basal cell elongate, terminal cell obtuse; female vegetative cell 31-40 by 90-240 u, male 30-37 by 120~225 »; oogonium 63-78 by 85-115 pw; oospore (55~) 59-70 by 73-102 y; antheridium 27-35 by 9-20 u. TyPE LOCALITY: Europe. DISTRIBUTION: Massachusetts, Connecticut, New York, Ohio, Michigan, Indiana, Iowa, Mississippi, Oklaboma; British Columbia. Pyate 14. f. 186, 187. 55a. Oedogonium Landsboroughi var. norvegicum Wittr.; Wittr. & Nordst. Algae Exsicc. 204; 1879; Bot. Notiser 1879: 23. 1879. Oedogonium Landsboroughi var. robustum Wittr.; Wittr. & Nordst. Algae Exsicc. 1215. 1896; Bot. Notiser 1897: 83. 1897. Vegetative cell shorter but of larger diameter, the female 38-45 by 60-160 u, the male 36-45 by 55-135 x; oogonium 64-73 by 70-105 4; oospore 60-70 by 67-90 u; antheridium 35-45 by 8-15 4». Type LocaLity: Norway. Distrraurion: lowa; Mexico. PLATE 14. f. 188, 189. 56. Oedogonium crassum (Hassall) Wittr. Bih. Sv. Vet.-Akad. Handl. 14:20. 1872. Vesiculifera crassa Hassall, Ann. Mag. Nat. Hist. 10: 389. 1843. Ocedogonium crassum var. orbiculare Jao, Papers Mich. Acad. 19: 87. 1934. Dioecious, macrandrous; oogonia 1 or 2, ovoid to obovoid-ellipsoid, pore superior; oospore variable, ellipsoid to globose, filling or not filling oogonium; spore-wall smooth; antheridia 2-25; sperms 2, division vertical; female vegetative cell 30-50 by 72-340 », male 24-36 by 72-260 w; oogonium 60~80 by 75-120 »; oospore 58-76 by 65-96 u; antheridium 28-33 by 8-20 p. Type LocaLity: Sweden. DISTRIBUTION: Ohio, Michigan, Indiana, Florida, Alabama, Mississippi, Oklahoma. PLate 14. f. 184, 185. 57. Oedogonium amplum Magnus & Wille; Wille, Bih. Sv. Vet.- Akad. Handl. 88: 40. 1884. Oedogonium crassum Wille, Bih. Sv. Vet.-Akad. Hand]. 818: 39. 1884. Not0O.crassum Wittr. 1872. ? Oedogonium rivulare var. majus Wolle, Fresh-w. Alg. U. $.92. 1887. Oedogonium crassum var. amplum Hirn, Acta Soc. Sci. Fenn. 27: 139. 1900. Dioecious, macrandrous; oogonia | or 2, ovoid to obovoid-ellipsoid, pore superior; oospore ellipsoid to broadly ellipsoid (or nearly globose), nearly filling oogonium, its wall smooth; an- theridia 2-20, division vertical; female vegetative cell 46-54 by 70-160 u, male 42-50 by 65- 200 »; oogonium 75-90 by 83-115 u; oospore 72-85 by 77-100 u; antheridium 40-50 by 8-20 pz. Type LocaLity: Uruguay. DISTRIBUTION: Ohio, Michigan, Illinois, Florida, Mississippi. PLATE 14. f. 182, 183. 40 NORTH AMERICAN FLORA [VoLuME 11 58. Oedogonium longum (Transeau) Transeau; Tiff. Ohio Jour. Sci. 34: 324. 1934. Oedogonium crassum var. longum Transeau, Techn. Publ, N. Y. Coll. Forestry 9: 237. 1918. Dioecious, macrandrous; oogonium 1, elongate-ovoid to ellipsoid to elongate-ellipsoid, pore superior; oospore ellipsoid, not filling oogonium longitudinally, its wall smooth; antheridia 1-5; sperms 2, division vertical; female vegetative cell 40-52 by 100-240», male 36-44 by 100-180 »; oogonium 68-84 by 120-180 yu; oospore 66-80 by 100-125 uw; antheridium 34~40 by 8-14 p. Type LOcaALITY: Oneida Lake, New York. DISTRIBUTION: New York, Ohio, Indiana; Puerto Rico. PiaTe 15. f. 192, 193, 59. Oedogonium subrectum Hirn, Acta Soc. Sci. Fenn. 27:141. 1900. Dioecious, macrandrous; oogonia 1 or 2, subellipsoid or obovoid-ellipsoid, pore superior; oospore ellipsoid or globose-ellipsoid, filling or nearly filling oogonium; spore-wall smooth, often thick; antheridia to 9-seriate; sperms 2, division vertical; basal cell elongate; terminal cell apically obtuse; female vegetative cell 27-35 by 160-340 u, male 26-33 by 104-300 x; oogonium 70-83 by 83-103 4; oospore 65-80 by 75-93 w; antheridium 22-28 by 8-14 u. Type LocaLity: Brazil. DISTRIBUTION: North Carolina. PLate 15. f. 194-196. 60. Oedogonium fabulosum Hirn, Acta Soc. Sci. Fenn. 27:114. 1900. Dioecious, macrandrous; oogonium 1, little tumid, cylindric, pore superior; oospore globose or ellipsoid, not filling oogonium in length; spore-wall smooth; antheridia seriate; sperms 2, division vertical; vegetative cell 74-85 by 115-210 un; oogonium 81~96 by 104-133 y; oospore 75-89 by 78-104 wv; antheridium 68-80 by 7-22 u. TYPE LOCALITY: Brazil. DistRIBUTION: Florida. PuLatE 14. f, 190, 191. 61. Oedogonium exocostatum Tiff. Ohio Jour. Sci. 21: 272. 1921. Dioecious, macrandrous; oogonia 1 or 2, ellipsoid to ellipsoid-globose, occasionally ter- minal, pore superior; oospore of the same form as the oogonium, which it very nearly completely fills; spore-wall of two layers, the outer marked by 13-15 longitudinal ribs, the inner smooth; suffultory cell swollen; male filament a little more slender than the female; antheridia 3-7; sperms 2, division horizontal; basal cell elongate; female vegetative cell (13-) 18-25 by 72- 140 n, male (13-) 16-20 by 48-100 4; suffultory cell 22-30 by 60-90 u; oogonium 40-52 by 60-96 uw; oospore 38-41 by 56-68 w; antheridium 12-16 by 7-12 zu. Type LocaLity: Akron, Ohio. DisrRiBuTION: Ohio, Indiana, Iowa, Oklahoma; Puerto Rico. PLATE 15. f. 199-203. 62. Oedogonium paulense Nordst. & Hirn; Hirn, Acta Soc. Sci. Fenn. 27: 292. 1900; Schmidle, Hedwigia 40: 344. 1901. Monoecious; oogonium 1, subellipsoid or ellipsoid-ovoid, pore superior; oospore ellipsoid to broadly ellipsoid, not or quite filling oogonium; spore-wall of three layers, the outer and inner smooth, the middle with 18-22 longitudinal ribs, entire and sometimes anastomosing; antheridia 1 or 2, subepigynous; sperms 2, division horizontal; vegetative cell 10-15 by 50- 120 4; oogonium 33-38 by 43-68 yu; oospore 30-36 by 38-45 u; antheridium 10-14 by 6-8 xz. TYPE LOCALITY: Brazil. DisTRIBUTION: Indiana; Puerto Rico. PuaTE 15. f. 197, 198. Part 1, 1937] OEDOGONIACEAE 41 63. Oedogonium paludosum (Hassall) Wittr. Oefv. Sv. Vet.-Akad. Forh. 27: 124. 1870. Vesiculifera paludosa Hassall, Hist. Brit. Fresh-w. Algae 1: 199. 1845. t Monoecious; oogonium 1, ellipsoid, pore superior; oospore ellipsoid, filling oogonium; spore-wall in three layers, the outer and middle with 27-35 longitudinal ribs, continuous, rarely anastomosing, the inner layer smooth; antheridia 1-8, scattered, often in the upper part of the filament; sperms 2, division vertical; vegetative cell 15-20 by 50-140»; oogonium 39-48 by 66-84 »; oospore 36-45 by 54-63 «4; antheridium 14-16 by 6-13 x. TYPE LOCALITY: England. DistRIBUTION: Pennsylvania, Michigan, Indiana, Illinois; British Columbia. PLATE 15. f. 208. 63a. Oedogonium paludosum var. parvisporum Hirn, Acta Soc. Sci. Fenn. 27: 120. 1900. Oogonium subellipsoid or suboblong-ellipsoid; oospore not filling oogonium; antheridium sub- epigynous or subhypogynous or scattered; vegetative cell 15-20 by 45-120 »; oogonium 38-44 by 70-86 »; oospore 35-41 by 54-60»; antheridium 15-17 by 7-12 2. Type Locality: Sweden. DIsTRIBUTION: Ohio, Michigan, Indiana, Illinois, Oklahoma. Prate 15. f. 209. 64, Oedogonium carolinianum Tiff. Ohio Jour. Sci. 34: 324. 1934. Oedogonium paludosum var. americanum Nordst.; Hirn, Acta Soc. Sci. Fenn. 27: 121. 1900. Monoecious; oogonium single, ellipsoid or nearly so, pore superior; oospore ellipsoid (often broadly so), filling oogonium or nearly so; spore-wall of three layers, the outer and middle with 27-35 (40) longitudinal costae, continuous and rarely anastomosing, the inner layer smooth; antheridia 1-7, scattered; sperms 2, division vertical; vegetative celi 14-23 by 45-156 u; oogonium 54~63 by 75—90 uw; oospore 49-57 by 69~75 yw; antheridium 12-18 by 7-12 u. TYPE LocALitTy: South Carolina. DISTRIBUTION: South Carolina. PuaTE 15. f. 210. 65. Oedogonium occidentale (Hirn) Tiff. Ohio Jour. Sci. 34: 324. 1934. Oedogonium Boscii var. occidentale Hirn, Acta Soc. Sci. Fenn. 27: 125. 1900. Dioecious, macrandrous; oogonium single, oblong-ellipsoid, pore superior; oospore ellipsoid, not nearly filling oogonium longitudinally, its wall of three layers, the outer and middle with 27-35 continuous longitudinal costae, the inner smooth; antheridia 1-6, scattered; sperms 2, division horizontal; vegetative cell 8-16 by 50-165 4; oogonium 29-38 by 69-100 u; oospore 27-37 by 42-50 wu; antheridium 12-13 by 10-16 yw. TYPE LOCALITY: Kittery, Maine. DISTRIBUTION: Maine, Massachusetts, Indiana, North Carolina, Oklahoma. Piate 16. f. 211-213. 66. Oedogonium Boscii Wittr. Nova Acta Soc. Sci. Upsal. III. 99: 34. 1874. ? Prolifera Boscii Le Clerc, Mém. Mus. Paris 3: 474. 1817. Conferva vesicata Ag.; Desmaz. Pl. Crypt. 1335. 1845. Dioecious, macrandrous; oogonium 1 (rarely 2), oblong-ellipsoid, pore superior; oospore ellipsoid, not nearly filling oogonium longitudinally; spore-wall of three layers, the outer and middle layers with 27-35 continuous, rarely anastomosing, longitudinal ribs, the inner smooth; antheridia 1-8, scattered, often in upper part of filament; sperms 2, division vertical; female vegetative cell 14-23 by 45-135 u, male 13-18 by 52-108 u; oogonium 39-51 by 75-110 yu; oospore 36-43 by 56-70 p»; antheridium 13-14 by 6-16». Type LocaLity: Europe. ; ; a ; DISTRIBUTION: Massachusetts, Connecticut, Ohio, Indiana, Illinois, Iowa, North Carolina, Florida, Mississippi, California; Puerto Rico; British Columbia. Puate 16. f. 214, 215. 42 NORTH AMERICAN FLORA (VoLuME 11 66a. Oedogonium Boscii f. dispar Hirn, Acta Soc. Sci. Fenn. 27:124. 1900. Oospore smaller, ellipsoid-globose or subglobose; vegetative cell 14-21 by 60-170 u; oogonium 38-45 by 70-92 u; oospore 34-43 by 44-55 4. Type Locality: Medford, Massachusetts. DISTRIBUTION: Massa- chusetts, Pennsylvania, California. PLaTeE 16. f. 216. 67. Oedogonium crenulatocostatum Wittr. Bot. Notiser 1878: 139. 1878. ? Oedogonium apiculatum Wolle, Bull. Torrey Club 6: 188. 1877. Dioecious, macrandrous; oogonia 1-6, obovoid to subellipsoid, often terminal, pore supe- rior; oospore of the same form, and nearly or quite filling the oogonium; outer spore-wall smooth, the median with 14-20 longitudinal ribs, crenulate and sometimes anastomosing, the inner smooth; antheridia 2-6, often alternating with vegetative cell; sperms 2, division hori- zontal; terminal cell obtuse to broadly apiculate; female vegetative cell 10-18 by 25-125 yp, male 9-13 by 32-80»; oogonium 30-36 by 40-65 »; oospore 28-34 by 37-55 w; antheridium 9-12 by 9-14 nu. Tyer LocaLtry: Bethelehem, Pennsylvania. DISTRIBUTION: New Hampshire, Massachusetts, Connecticut, Pennsylvania, Ohio, Michigan, Indiana, Illinois, Iowa, North Carolina, Kentucky, Wyoming. Puiate 15. f. 204-206. 67a. Oedogonium crenulatocostatum var. cylindricum (Hirn) Tiffany, var. nov. O¢edogonium Boscit Wittr.; C. H. S. Phyc. Bor. Am. 118. 1895. Not O. Boscii Wittr. 1874. O0edogonium crenulatocostatum {. cylindricum Hirn, Acta Soc. Sci. Fenn. 27: 129. 1900. Oogonium and oospore cylindric-oblong or more rarely ellipsoid or obovoid-ellipsoid; ribs of oospore scarcely crenulate; vegetative cell 11-16 by 44-150 u; oogonium 30-36 by 42-81 »; oospore 27-34 by 40-65 ». TyPE LOCALITY: Lynnsfield, Massachusetts. Distr1isuTion: New Hampshire, Massachusetts, Connecticut, Ohio, Indiana, Illinois, Missouri. PLATE 15. f. 207. 68. Oedogonium longiarticulatum (Hansg.) Tiff. Ohio Jour. Sci. 34: 325. 1934. Oedogonium crenulatocostatum var. longiarticulatum Hansg. Arch. Nat. Land. Bébmen 5°: 46. 1886. Oedogonium calosporum Hirn, Acta Soc. Faun. Fl. Fenn. 116: 20. 1895. Dioecious, macrandrous; oogonium single, obovoid to subellipsoid, pore superior; oospore obovoid to nearly ellipsoid, not filling oogonium, its wall of three layers, the outer and inner smooth, the middle with 12-18 longitudinal, distinctly crenate (sometimes appearing dentate} costae; the antheridia 2-5, often alternating with vegetative cell; sperms 2, division horizontal; vegetative cell 12-15 by 60-90 4; oogonium 27-32 by 58-604; oospore 24-30 by 44-52 u; antheridium 8-11 by 10-144. ‘TYPE LOCALITY: Bohemia. DIstRIBUTION: Massachusetts, Ohio, Michigan. Piate 16. f. 226, 227. 69. Oedogonium aureum (Tilden) Tiff. Ohio Jour. Sci. 34: 324. 1934, Oedogonium crenulatocostatum var. aureum Tilden, Am. Algae 123. 1896; Bot. Gaz. 25:90. 1898. Dioecious, macrandrous; oogonium single, obovoid to nearly ellipsoid, pore superior; oospore obovoid to globose-ellipsoid, not completely filling oogonium; middle spore-wall with 12-16 dentate ribs (sometimes nearly areolate) connected by transverse ridges; antheridium 1-?; sperms 2, division horizontal; vegetative cell 10-13 by 35-110 u; oogonium 30-35 by 38- 50 wu; oospore 29-33 by 35-43 yw; antheridium 10 by 10 pw. TYPE LOCALITY: Yellowstone National Park, Wyoming. DisTRIBUTION: Ohio, Iowa, Wyoming, Colorado; Puerto Rico. PLATE 16. f. 217. 70. Oedogonium areolatum Lagerh. Anal. Univ. Ecuador 4°77: 80. 1890. Dioecious, macrandrous; oogonia 1-4, obovoid or obovoid-globose, with superior pore; oospore subellipsoid or ellipsoid-globose, filling or not filling oogonium; middle layer of spore- Part 1, 1937] OEDOGONIACEAE 43 wall areolate; antheridia 3-12; sperms 2: basal cell elongate; terminal cell apically obtuse; female vegetative cell 16-21 by 65-165 u, male 15-19 by 60-140 yz; oogonium 48-60 by 60-75 py; oospore 45-57 by 48-60 »; antheridium 14-17 by 8-10 p. ‘TYPE LocALity: Ecuador. DISTRIBUTION: Ohio, Iowa. Pate 16. f. 221-223. 71. Oedogonium subareolatum Tiff. Brittonia 2: 168. 1936. Monoecious; oogonium single, ellipsoid, filling the oogonium, with superior pore; oospore broadly ellipsoid, filling oogonium or not; membrane triple, the outer and inner spore-wall smooth, the middle areolate; antheridium single or 2-3 seriate, subepigynous; sperms 2, with horizontal division; basal cell elongate; vegetative cell 8-12 by 26-91 u; oogonium 31-35 by 39-48 yw; oospore 29-32 by 36-42 uw; antheridium 9-10 by 4-6 4; basal cell 7-13 by 97-100 u. TYPE LOCALITY: Santurce, Puerto Rico. DISTRIBUTION: Puerto Rico. PLATE 16. f. 218, 219. 72. Oedogonium dictyosporum Wittr. Nova Acta Soc. Sci. Upsal. TIT. 9%: 13. 1874. Monoecious; oogonia 1 or 2, obovoid-globose, with superior pore; oospore globose to ellip- soid-globose, usually not filling oogonium; outer layer of spore-wall reticulate, the inner smooth; antheridia 1-3, subepigynous; sperms 2; vegetative cell 11-16 by 25-95 4; oogonium 33-40 by 38-46 »; oospore 28-38 by 30-40 yw; antheridium 8-13 by 5-10 nu. TYPE LOCALITY: Brazil. DistrisuTion: Iowa. PLATE 16. f. 224. 73. Oedogonium foveolatum Wittr. Bot. Notiser 1878: 133. 1878. Monoecious; oogonia | or 2, obovoid to subellipsoid-globose, with superior pore; oospore globose to subellipsoid-globose, filling or not filling oogonium; outer spore-wall scrobiculate; antheridia 1-7; sperms two, division horizontal; basal cell elongate, terminal cell apically obtuse; vegetative cell 14-23 by 35-115 4; oogonium 37-49 by 38-61 4; oospore 33-46 by 34- 53 uw; antheridium 12-19 by 5-124 Type LOcALIty: St. Thomas, West Indies. DistTRisuTion: Indiana, Florida; Puerto Rico; St. Thomas. PLATE 16. f. 228 74. Oedogonium scrobiculatum Wittr.; Wittr. & Nordst. Algae Exsice. 1018. 1893; Bot. Notiser 1893: 192. 1893. Dioecious, macrandrous; oogonia 1-3, obovoid or subellipsoid, pore superior; oospore of same form as oogonium and nearly filling it; outer spore-wall scrobiculate, the inner smooth; antheridium 1-?; sperms 2, division horizontal; female vegetative cell 16-24 by 50-1444, male 15-19 by 45-110 «; suffultory cell 21-30 by 34-90 u; oogonium 40-48 by 60-88 u«; oospore 39-45 by 48-57 »; antheridium 13-15 by 8-12 u. TYPE LocaLity: Ecuador. DistTRisuTIoNn: Florida. PLATE 16. f. 225. 75. Oedogonium verrucosum Hallas, Bot. Tidssk. 26: 408. 1905. Dioecious, macrandrous; oogonia | or 2, broadly ellipsoid or obovoid-globose, pore superior; oospore globose or ellipsoid-globose, not filling oogonium ; middle layer of spore-wall scrobiculate; suffultory cell enlarged; antheridia 4-?; sperms 2, division horizontal; basal cell elongate; terminal cell, frequently an oogonium, obtuse; female vegetative cell 11-26 by 45-200 u; 44 NORTH AMERICAN FLORA {[VoLumg 11 suffultory cell 19-49 by 30-145 4; oogonium 56-68 by 56-94 4; oospore 52-64 by 44-68 u; antheridium 16 by 16 4; basal cell 30-35 by 45-160 yu. TYPE LOCALITY: Denmark. DisTRIBUTION: Michigan, Indiana. PLATE 17. f. 232-234. 76. Oedogonium Tiffanyi Ackley, Trans. Am. Micr. Soc. 48: 304. 1929. Dioecious, macrandrous; oogonia 1 or 2, subdepressed-globose or broadly pyriform-globose, pore superior; oospore globose, nearly filling oogonium; median layer of spore-wall scrobiculate; suffultory cell enlarged; antheridia 1-7; sperms 2, division horizontal; basal cell ellipsoid- elongate; vegetative cell (15-) 21-24 by 100-240 y; suffultory cell 25-32 by 100-230 «; oogonium 64-76 by 65-69 uw; oospore 54-65 by 55-66 uw; antheridium 19-21 by 14-20 uz. TYP LOCALITY: Muskegon Lake, Michigan. DIsTRIBUTION: Michigan, Iowa, Florida. PLATE 18. f. 254-257. 77. Oedogonium punctatum Wittr. Bot. Notiser 1878: 142. 1878. Dioecious, macrandrous; oogonia 1-4, obovoid (rarely globose-obovoid), pore superior; oospore obovoid, nearly filling oogonium (rarely subglobose and not filling oogonium); outer spore-wall scrobiculate; antheridia 1-5, often alternating with vegetative cell; sperms 2, division horizontal; basal cell elongate; terminal cell (often oogonium) apically obtuse; vegetative cell 15-22 by 42-128 u; oogonium 38-45 (—-48) by 52-65 uw; oospore 37-43 by 43-55 yw; antheridium 15-17 by 6-10 yp. TYPE LOCALITY: Vera Cruz, Mexico. DISTRIBUTION: Ohio, Florida; Mexico. PuLaTE 17. f. 244, 245. 78. Oedogonium argenteum Hirn, Acta Soc. Sci. Fenn. 27:289. 1900. Dioecious, macrandrous; oogonium 1, obovoid-globose to globose, pore superior (rarely supramedian); oospore ovoid to globose; outer layer of spore-wall scrobiculate; antheridia 3-4; sperms 2, division horizontal; basal cell elongate; female vegetative cell (14-) 20-28 by 80- 160 4, male 20-22 by 70-160 u; oogonium 44-52 by 48-624; oospore 43-48 by 44-50 uy; antheridium 22 by 8 pu. TYPE LocaLity: Brazil, DIsTRIBUTION: Michigan, Florida. PLATE 17. f. 237, 238. 78a. Oedogonium argenteum f. michiganense Tiff. Oedog. Monog. 97. 1930. Oedogonium argenteum Ackley, Trans. Am. Micr. Soc. 48: 302. 1929. Not O. argenteum Hirn. 1900. Middle wall of oospore scrobiculate; pore of oogonium supramedian; otherwise as in the species. TYPE LocaLity: Roland Lake, Michigan. Distripurion: Michigan. 79. Oedogonium figuratum Tiff. Brittonia 2: 167. 1936. Dioecious, macrandrous; oogonium broadly pyriform or ovoid, single or 2—4-seriate, often terminal, with superior (rarely supreme) pore; oospore globose, not filling oogonium; outer and inner wall smooth, middle wall scrobiculate; antheridium single or 2-5 seriate; sperms 2 with horizontal division; vegetative cell often somewhat capitellate, 15-20 by 58-100 »; oogonium 48-56 by 55-65 yw; oospore 45-52 by 45-52 w; antheridium 15-17 by 9-14 p. TYPE LOCALITY: Puerto Rico. DISTRIBUTION: Puerto Rico. PLATE 16. f. 229-231. 80. Oedogonium Wyliei Tiff. Trans. Am. Micr. Soc. 45:90. 1926. Dioecious, macrandrous; oogonia 1-4, globose to ovoid, pore superior ; oospore globose to ovoid, filling or not filling oogonium; outer spore-wall irregularly scrobiculate; antheridia 1-4; Part 1, 1937] OEDOGONIACEAE 45 sperms 2, division horizontal; basal cell elongate; terminal cell, often an oogonium, apically obtuse or broadly apiculate; vegetative cell 16-24 by 80-170 u; oogonium 52-64 by 68-112 n; oospore 48-60 by 52-64 uv; antheridium 16-19 by 8-18 p. TYPE Locality: Storm Lake, Iowa. DISTRIBUTION: Ohio, Michigan, Indiana, Iowa, Florida; Puerto Rico, PLATE 17. f. 246-249. 81. Oedogonium indianense Britton & Smith, Proc. Ind. Acad. 44:67. 1935. Dioecious, macrandrous; oogonia 1-3, obovoid to nearly pyriform, pore superior; oospore globose to ovoid, usually not filling oogonium; outer spore-wall scrobiculate, inner smooth; antheridia 1-3; sperms 2, division horizontal; vegetative cell 10-16 by 72-110 4; oogonium 36-46 by 50-64 uw; oospore 35~44 by 40-46 yw; antheridium 13-16 by 9-13 u. TYPE LocaLity: Indiana. DistTRIBuTION: Indiana. PLATE 17. f. 239-243. 82. Oedogonium americanum Transeau, Ohio Jour. Sci. 17:231. 1917, Dioecious, macrandrous; oogonium 1, globose to depressed-globose, pore superior; oospore globose, ellipsoid-globose, or depressed-globose, filling oogonium or not; spore-wall of three layers, the median layer scrobiculate, the outer and inner layers smooth; antheridia 1-5, frequently alternating with vegetative cells; sperms 2, division horizontal; basal cell elongate; terminal cell obtuse; female vegetative cell 28-48 by 40-1004, male cell 24-30 by 40-100 u; oogonium 40-76 by 48-70 u; oospore 38-74 by 46-56 uw; antheridium 20-28 by 4-12 u. Tyrek LocaLity: Charleston, Illinois. DistRIBuTION: Michigan, Illinois PuaTE 18. f. 258-260. 83. Oedogonium taphrosporum Nordst. & Hirn; Hirn, Acta Soc. Sci. Fenn. 27: 133. 1900. Dioecious, macrandrous; oogonia 1-6, obovoid or obovoid-ellipsoid, pore superior; oospore globose or ellipsoid-globose, not filling oogonium; outer layer of spore-wall scrobiculate, inner layer smooth; antheridia 2—?; terminal cell, sometimes an oogonium, obtuse; basal cell elongate; vegetative cell 25-38 by 100-375 »; oogonium 70-83 by 81-113 4; oospore 58-65 by 62-70 u; antheridium 24-32 by 8-12 un. TYPE LOCALITY: Brazil. ; eee nt : DISTRIBUTION: Massachusetts, Ohio, Michigan, Illinois, Florida. PLATE 17. f. 235, 236. 84. Oedogonium arcyosporum Nordst. & Hirn; Hirn, Acta Soc. Sci. Fenn. 27: 104. 1900. Monoecious; oogonia 1-5, obovoid to ellipsoid-globose, pore superior; oospore ellipsoid- globose to subglobose, not usually filling the oogonium; spore-wall of three layers, the outer and inner smooth, the median areolate; antheridia 1-4, subepigynous to subhypogynous; vegetative cell 13-20 by 50-200 nu; oogonium 41-55 by 43-68 »; oospore 38-50 by 40-55 yn; antheridium 11-15 by 8-12 uw. Type Locality: Brazil. DisTRIBUTION: Puerto Rico. PLATE 16. f. 220. 85. Oedogonium reticulocostatum Jao, Rhodora 36: 208. 1934, Dioecious; oogonia 1-8, globose or subobovoid-globose, operculate, division supreme, narrow; oospore globose, orange at maturity, filling the oogonium, except in length; spore-wall 46 NORTH AMERICAN FLORA [VoLuUME 11 of three layers, the outer and inner smooth, the median layer with 10-22 longitudinal, toothed and thickened ribs, connected by transverse, sometimes anastomosing lines forming coarse reticulations; polar region reticulate, disc-shaped; polar axis transverse or oblique to the axis of filament; ribs in part not reaching the margin of the polar disk; vegetative cell slightly capitel- late, the terminal cell apically obtuse to sharply conical, the basal cell enlarged; vegetative cell 8-16 by 44-86 u; suffultory cell 22-26 by 44-58 »; oogonium 26-38 by 32-46 (-72) u; oospore 23-32 by 27-32 yu. TYPE LocaLity: Woods Hole, Massachusetts. DisTRIBUTION: Massachusetts. PLATE 19. f. 268, 269; Puate 36. f. 555, 556. 86. Oedogonium pseudacrosporum Wittr.; Hirn, Acta Soc. Sci. Fenn. 27: 193. 1900. Monoecious; oogonium 1, ellipsoid, operculate, division supreme, lid very small and often deciduous; oospore ellipsoid, completely filling oogonium, spore-wall coalescing with that of oogonium, longitudinally ribbed, ribs manifestly crenulate; antheridia 1-4, hypogynous or subepigynous; sperms 2, division horizontal; basal cell elongate; terminal cell long, setiform; vegetative cell 9-13 by 32-110 4; oogonium (27—) 32-37 by (44-) 45-56 uw; antheridium 8-13 by 6-12 nu. TYPE LOCALITY: Sweden. DISTRIBUTION: Indiana, Iowa, Florida. PLATE 18. f. 252, 253. 87. Oedogonium eriense Tiff. Trans. Am. Micr. Soc. 55:4. 1936. Monoecious; oogonium ellipsoid to broadly ellipsoid, with superior operculum; oospore broadly ellipsoid to ovoid, not filling the oogonium longitudinally, with outer and inner walls smooth and median wall longitudinally costate, the ribs 18-26 in number; antheridium 1-?, subepigynous; sperm (?) single; vegetative cell 16-24 by 52-104 u; oogonium 38-48 by 64-85 u; oospore 36-46 by 48-70 uw; antheridium 16-19 by 15-16 pw. ‘TYPE LOcaLiry: Lake Erie, Ohio. DistRIBUTION: Ohio. PLATE 19. f. 266, 267. 88. Oedogonium paucostriatum Tiff. Ohio Jour. Sci. 34: 325. 1934. Oedogonium paucocostatum var. gracile Tiff. Ohio Jour. Sci. 21:273. 1921. Dioecious, macrandrous; oogonium 1, ellipsoid, with superior operculum; oospore ellipsoid or occasionally globose-ellipsoid, filling oogonium or not, its outer and inner wall smooth, median wall with 15-20 longitudinal ribs; antheridia 2-4; sperms 2, division horizontal; vegetative cell 15-20 by 66-120 »; oogonium 48-52 by 70-88 »; oospore 44-48 by 60~—70 uw; antheridium 17-20 by 8-12 yn. TYPE LocaLity: Akron, Ohio. DIsTRIBUTION: Ohio, Iowa; British Columbia. PLATE 19. 7. 265. 89. Oedogonium paucocostatum Transeau, Am. Jour. Bot. 1: 300. 1914. Dioecious, macrandrous; oogonium 1, ellipsoid, operculate, division superior; oospore ellipsoid, nearly filling the oogonium, the outer and inner walls smooth, the median longitudi- nally ribbed, ribs 15-19 in number; antheridia 2-8; sperms 2, division horizontal; terminal cell obtuse; basal cell usually elongate; vegetative cell (15-) 19-25 by 70-160 »; oogonium 54-60 by 70-104 u; oospore 50-56 by 66-90 uw; antheridium 18-23 by 8-12 yu. TYPE LocaLity: Casey, Illinois. DistTRIBUTION: Ohio, Indiana, Illinois, Iowa, Oklahoma. PLATE 19. f. 263, 264. Part 1, 1937] OEDOGONIACEAE 47 90. Oedogonium nobile Wittr. Nova Acta Soc. Sci. Upsal. ITT. 93:14. 1874, Monoecious; oogonium 1 (very rarely 2), ellipsoid or subobovoid-ellipsoid, operculate, division superior; oospore ellipsoid-globose or globose, not filling oogonium; spore-wall of three layers, the outer and inner layers smooth, the middle layer with 30-35 continuous longitudinal ribs, rarely anastomosing; antheridia 1-3, hypogynous; sperms 2, division horizontal; vegetative cell 16-20 by 80-180 nu; oogonium 57-65 by 67-90 pu; oospore 48-55 by 50-58 uw; antheridium 15-19 by 9-13 p. TYPE LOCALITY: Norway. DIsTRIBUTION: Massachusetts. PLateE 18. f. 261. _ _ 90a. Oedogonium nobile var. minus Hirn, Acta Soc. Sci. Fenn. 27: 190. 1900. Oedogonium insigne var. minus Hirn, Acta Soc. Faun. Fl, Fenn. 116: 15. 1895. Larger; oospore ellipsoid, filling oogonium ; vegetative cell 13-22 by 80-240 u; oogonium 58-63 by 85-100 4; oospore 54-59 by 68-80 pn; he a 16-19 by 7-18 un. Type Locality: Finland. DisrrisuTion: Massachusetts. PLatTs 91. Oedogonium mammiferum Wittr. Nova Acta Soc. Sci. Upsal. ITT. 93: 16. 1874. ? Oedogonium huillense W. & G. West, Jour. Bot. 35:5. 1897. Monoecious; oogonium 1 (rarely 2 or 3), ellipsoid, with mammiform projections appearing as 7-9 radiations seen vertically, operculate, division inframedian, very narrow; oospore globose or subdepressed-globose (rarely depressed-globose), not filling oogonium; spore-wall smooth; antheridium 1, subepigynous; basal cell elongate; vegetative cell 5-8 by 20-56 u; oogonium 20-28 by 20-30 »; oospore 12-17 (-20) by 12-16 yw; antheridium 6 by 7 xz. TYPE LOCALITY: Norway and Sweden. DISTRIBUTION: Massachusetts, North Carolina. PLATE 19. f. 280-282. 92. Oedogonium Itzigsohnii De Bary, Abh. Senck. Nat. Ges. 1:56. 1854. Oedogonium platygynum B. Eichler, Pam. Fizyjogr. 12%: 158. 1893. Not O. platygynum Wittr. 1872. Monoecious; cogonium 1, ellipsoid, with median, conically obtuse projections, appearing stellate in vertical view, with 7—10 radiations, operculate, division inframedian; oospore globose, not completely filling oogonitm; spore-wall smooth; antheridia 1 or 2; terminal cell apically obtuse or apiculate; vegetative cell 8-10 by 25-60 x; oogonium 34-40 by 32-40 nv; oospore 20-23 by 20-23 u; antheridium 8-9 by 8-15 pz. TYPE LOCALITY: Germany. DISTRIBUTION: Massachusetts, Florida. Puate 19. f. 283, 284. 93. Oedogonium Brittonii Tiff. Brittonia 2: 167. 1936. Monoecious; cogonium single or 2-4 seriate, globose or depressed-globose, with basal operculum; oospore of the same form as the oogonium and filling it or nearly so; spore-wall smooth; antheridium single, hypogynous or subhypogynous or subepigynous; sperm single; vegetative cell evidently capitellate, sometimes incrusted with calcium carbonate; vegetative cell 16-22 by 20-65 4; oogonium 32-42 by 30-36 4; oospore 30-39 by 29-32 w; antheridium 16-18 by 11-13 p. Type LOCALITY: Santurce, Puerto Rico. DISTRIBUTION: Puerto Rico. PiatE 20. f. 300-302. 48 NORTH AMERICAN FLORA [VOLUME 11 94. Oedogonium Howei Tiff. Brittonia 2: 166. 1936. Dioecious, macrandrous; oogonium depressed-globose or globose (rarely subglobose), with basal operculum; oospore of the same form as the oogonium and filling it; spore-wall smooth; antheridia up to 20-seriate or single (often alternating with vegetative cell); sperm sin- gle (?); basal cell hemispheric or depressed-globose; vegetative cell capitellate, 8-14 by 21-78 u; oogonium 27-36 by 22-30 uw; oospore 25-34 by 20-27 uw; antheridium 9-11 by 8-14 uw; basal cell 16-23 by 13-16 p. Type Locality: Arecibo, Puerto Rico. DISTRIBUTION: Ohio; Puerto Rico. PLATE 20. f. 297-299. 95. Oedogonium infimum Tiff. Ohio Jour. Sci. 24: 183. 1924. Dioecious, macrandrous; oogonium 1, globose or subglobose (or the basal part extended, appearing subpyriformeglobose), operculate, division at the lowest extremity of the oogonium; oospore globose or subglobose; spore-wall smooth; male plants a little larger than the female; antheridia 1-10; sperms 2; vegetative cell distinctly capitellate; basal cell of filament subhemi- spheric, not elongated; filaments not infrequently incrusted with lime; female vegetative cell 12-18 by 60-140 p, male 16-20 by 60-140 yw; oogonium 40-48 by 41-50 u; oospore 40-44 by 38-42 uw; antheridium 14-20 by 8-12 u; basal cell 30-42 by 16-24 uy. TyPs Locality: Swan Lake, Iowa. DISTRIBUTION: Ohio, Iowa. PLATE 20. f. 294-296. 96. Oedogonium inversum Wittr. Oefv. Sv. Vet.-Akad. Foérh. 33°: 47. 1876; Tiff. Oedog. Monog. 100. 1930. ? Oedogonium monticchii Fior.-Mazz. Atti Accad. Nuovi Lincei 13: 259. 1860. Oedogonium inversum var. subclusum Wittr.; Wittr. & Nordst. Algae Exsicc. 26, in part. 1877; Bot. Notiser 1877+ 25. 1877. Oedogonium inversum {..subclusum Hirn, Acta Soc. Sci. Fenn. 27: 180. 1900. Dioecious, macrandrous; oogonia 1~4, globose or subglobose, operculate, division inferior; oospore globose, quite filling the oogonium; spore-wall smooth; antheridia 1-8; sperm 1; vege- tative cell capitellate; basal cell subhemispheric, not elongate; filament not infrequently incrusted with lime; vegetative cell 10-14 by 20-100 u; oogonium 28-35 by 24-34 u; oospore 26-32 by 22-30 uw; antheridium 10-12 by 9-12 u; basal cell 13-20 by 7-14 up. TYPE LOCALITY: Europe. DISTRIBUTION: Massachusetts, lowa; Puerto Rico. PLATE 20. f. 308-311. 97. Oedogonium Gunnii Wittr. Nova Acta Soc. Sci. Upsal. IIT. 9*: 37. 1874; Tiff. Oedog. Monog. 110. 1930. Monoecious; oogonia 1-4, subdepressed- or depressed-globose, operculate, division median, narrow but distinct; oospore same form as oogonium and filling it; spore-wall smooth, the outer layer thick and hyaline, the inner brown; antheridium subepigynous; vegetative cell 6-9 by 30-85 yw; oogonium 23-29 by 19-29 4; oospore 22-27 by 17-23 yw; antheridium 6 by 12 u. TYPE LOCALITY: Tasmania. Distrisution: Indiana, Florida, Alabama, Oklahoma. PLATE 19.7. 278. 98. Oedogonium acmandrium Elfv.; Hirn, Acta Soc. Faun. FI. Fenn. 116: 13. 1895, Monoecious; oogonia 1 or 2, depressed-globose or subglobose, operculate, division median and narrow; oospore depressed-globose or subglobose, filling oogonium, its wall smooth; an- theridia 1-3, subepigynous, epigynous, or hypogynous, often terminal; sperm single; basal cell! Par? 1, 1937] OEDOGONIACEAE 49 elongate; vegetative cell 7-10 by 30-80 u; oogonium 30-35 by 28-38 yu; oospore 28-33 by 25— 29 w; antheridium 8-10 by 10-15 yp. TYPE LOCALITY: Finland. DISTRIBUTION: Massachusetts, Illinois. PLATE 19. f. 285, 99. Oedogonium psaegmatosporum Nordst. Oefv. Sv. Vet.- Akad. Forh. 344: 24. 1877, Monoecious; oogonia 1-5, broadly pyriform-globose, operculate, division median, narrow but distinct; oospore depressed-globose to globose, inflating the middle part of oogonium; spore- wall smooth (?); antheridia to 15-seriate, hypogynous, cell a little tumid; sperm single; vegeta- tive cell 9-10 by 56-80 u; oogonium 28-33 by 33-40 yu; cospore 27-31 by 24-27 »; antheridium 9-12 by 6-10 zp. TYPE LOCALITY: Sweden. DIsTRIBUTION: Wyoming. PLATE 19. f. 279. 100. Oedogonium Howardii G. West, Jour. Bot. 42: 281. 1904; Tiff. Brittonia 2: 169. 1936. Oedogonium Howardii var. minus Tiff. Bot. Gaz. 83: 204. 1927. Dioecious, macrandrous; oogonium single or double, globose or subglobose, with broad median operculum; oospore globose, filling oogonium, its wall smooth; antheridia to 16-seriate, sperm single; vegetative cell evidently capitellate; basal cell subhemispheric to nearly spheric; vegetative cell 7-12 by 18-424; oogonium 26-33 by (23-) 26-33 4; oospore 21-30 by 24— 30 uw; antheridium 7-9 by 5-14 yu; basal cell 12-20 by 10-13 nu. ‘TYPE LOCALITY: Barbados. DisTRIBUTION: Ohio, Illinois, Florida, Oklahoma; Barbados. Pats 20 Ff. 290, 291. 101. Oedogonium pratense Transeau, Am. Jour. Bot. 1: 297. 1914. Dioecious, macrandrous; cogonium 1 (rarely 2), subdepressed-globose or broadly pyriform- globose, operculate, division median, narrow but distinct; oospore depressed-globose or sub- globose, filling or nearly filling oogonium; spore-wall smooth; antheridia 1 or 2, usually alter- nating with vegetative cell; sperm 1; basal cell elongate; female vegetative cell 10-17 by 35- 95 pw, male 8-15 by 32-82 uw; oogonium 33-40 by 35—50 wv; oospore 32-38 by 28-35 wu; antheridium 10-14 by 13-18 yw. TYPE LocaLity: Charleston, Illinois. DISTRIBUTION: Massachusetts, Ohio, Michigan, Indiana, Illinois, Iowa, Alabama, Mississippi. PLate 21. f. 325, 326. 102. Oedogonium mitratum Hirn, Acta Soc. Faun. Fl. Fenn. 116: 22. 1895; Tiff. Oedog. Monog. 105. 1930. Dioecious, macrandrous; oogonia 1-4, globose or subglobose, operculate, division supra- median or superior, narrow but distinct; oospore globose (rarely subglobose), filling oogonium; spore-wall smooth; antheridia 1-5, subepigynous; sperms 2, division horizontal; vegetative cell often capitellate; vegetative cell 4-10 by 18-80 4; oogonium 18-27 by 20-35 yw; oospore 17-23 by 17-23 w; antheridium 6~9 by 6-8 yu. TYPE LOcALIty: Finland, DisTRIBUTION: Massachusetts, Ohio, Illinois, North Carolina, Oklahoma. PLATE 19. f. 270, 271. 50 NORTH AMERICAN FLORA [VOLUME 11 103. Oedogonium abbreviatum (Hirn) Tiff. Ohio Jour. Sci. 34: 325. 1934. Oedogonium Pringsheimii var. abbreviatum Hirn, Acta Soc. Sci. Fenn. 27: 173. 1900. Oedogonium Pringsheimii var. brevius Jao, Papers Mich. Acad. 20:61. 1935. Dioecious, macrandrous; oogonia 1-3, obovoid-globose to depressed-globose, operculate, division superior; oospore similar to oogonium in shape, its wall smooth; antheridia 1-6, often alternating with vegetative cell; sperms 2, division horizontal; basal cell elongate; upper cells of filament usually shorter than lower ones; vegetative cell 10-22 by 15-50 y; oogonium 28-37 by 26-38 uw; oospore 26-34 by 24-35 uw; antheridium 9~16 by 5-10 yu. ‘Type Locavity: Brazil. DisTRIBUTION: Massachusetts, Indiana, Oklahoma; Puerto Rico. PLATE 21. f. 318. 104. Oedogonium Pringsheimii Cramer, Hedwigia 2:17. 1859; Wittr. Nova Acta Soc. Sci. Upsal. III. 9%: 33. 1874. Oedogonium pachydermatosporum Nordst. Minnesskr. Fys. Sailsk. Lund 7:21. 1878. a ea arenas var. Nordstedtii {. pachydermatosporum Hirn, Acta Soc. Sci. Fenn. 27: Dioecious, macrandrous; oogonia 1-6, subovoid-globose, operculate, division superior; oospore globose, nearly filling oogonium; spore-wall smooth, often thick; antheridia to 10-seriate, often alternating with vegetative cell; sperms 2, division horizontal; basal cell elongate; ter- minal cell broadly apiculate or obtuse; female vegetative cell 14-20 by 28-100 », male 12-16 by 24-64 4; oogonium 35-43 by 36-46 4; oospore 30-37 by 30-37 uw; antheridium 10-15 by 6-9 pu. TYPE LocaLity: Germany. Distrisurion: New York, Pennsylvania, Ohio, Michigan, Indiana, Iowa, Florida, Utah; Puerto Rico. Puate 21. f. 312, 313. 104e. Oedogonium Pringsheimii var. Nordstedtii (Wittr.) Wittr.; Wittr. & Nordst. Algae Exsice. 8. 1877. Oedogonium ciliare De Not. Erb. Critt. Ital. II. 29. 1868: Hedwigia 7: 120, 1868. Oedogonium Nordstedtii Wittr. Bot. Notiser 1872: 6. 1872. Oedogonium Euganeorum Wittr. Nova Acta Soc. Sci. Upsal. III. 93: 39. 1874. Oedogonium pachydermatosporum Lewin, Bih. Sv. Vet.- Akad. Handl. 14': 18. 1888. Not O. pachydermatosporum Nordst. 1878. Oedogonium Frank- linianum Tilden, Am. Algae 2. 1894. Not O. Franklinianum Wittr. 1880. Oedogonium Pring- Sheimii var. Nordstedtii f£. Euganeorum Hirn, Acta Soc. Sci. Fenn. 27: 172. 1900. Smaller than the species; oogonia | or 2; oospore not filling oogonium; female vegetative cell 10-16 by 20-76 yz, male 9-15 by 18-68 2; oogonium 28-36 by 36-45 un; oospore 26-34 by 27-34 u; antheridium 9-12 by 8-9 ». Type LocaLiry: Sweden. DisTRiBuTION: Ohio, Michigan, Indiana, Illinois, Iowa, Minnesota, California: Puerto Rico: Greenland. PLatTs 21. f. 314-317. 105. Oedogonium epiphyticum Transeau & Tiff.; Tiff. Ohio Jour. Sci. 34: 325, 1934. Oedogonium pisanum var. gracile Transeau & Tiff. Ohio Jour. Sci. 19: 241. 1919. Dioecious, macrandrous; oogonia 1-3, ellipsoid to ellipsoid-ovoid, with superior operculum; oospore ellipsoid to ellipsoid-ovoid to nearly globose, nearly filling oogonium; spore-wall smooth; antheridia 1 or 2; sperms 2, division horizontal; basal cell elongate; female vegetative cell 6-9 by 18~48 », male 5-8 by 16-45 nu; oogonium 16-20 by 20-30 u; oospore 15-18 by 18-28 yu; antheridium 5~7 by 5-10 u. ; TYPE LOCALITY: Coffeen, Illinois. DistrRIsutTion: Michigan, Indiana, Illinois, Iowa, Alabama, Mississippi. PLATE 21. f. 319, 320. 106. Oedogonium pisanum Wittr. Oefv. Sv. Vet.-Akad. Férh. 33°: 50. 1876. Oedogonium subpisanum Lewin, Bih. Sv. Vet.-Akad. Handl. 141: 17, 1888. Dioecious, macrandrous; oogonium 1 (rarely 2 or 3), ellipsoid-ovoid to ovoid, operculate, division superior; oospore ovoid to ellipsoid, nearly filling oogonium; spore-wall smooth; Part 1, 1937] OEDOGONIACEAE 5l antheridia 1-4; sperms 2, division horizontal; basal cell elongate; terminal cell piliferous; vegetative cell 5-12 by 12-72 u; oogonium 23-29 (-32) by 34-43 (-45) uw; oospore 21-25 by 27-37 »; antheridium 4-9 by 5-9 n. TYPE LOCALITY: Italy. DISTRIBUTION: Ohio, Indiana, Illinois, Iowa, Missouri, Mississippi. PLATE 21. f. 323, 324. 107. Oedogonium nanum Wittr. Nova Acta Soc. Sci. Upsal. III. 93: 37. 1874; Tiff. Trans. Am. Micr. Soc. 45:97. 1926. Dioecious, macrandrous; oogonia 1-3, ovoid to broadly ellipsoid, operculate, division superior; oospore ovoid to globose-ellipsoid, usually filling the oogonitum; spore-wall smooth; antheridia 1-3; sperm 1; basal cell subhemispheric; terminal cell, often an oogonium, apically obtuse; vegetative cell, often irregularly swollen, 6-10 by 15-33 »; oogonium 24-28 by 30-36 u; oospore 21-27 by 23-30 yw; antheridium 7-10 by 8-11 yw; basal cell 14-17 by 12-16 w. TYPE LOCALITY: India. DISTRIBUTION: Iowa; Puerto Rico. PLATE 22. 7. 345, 346. 108. Oedogonium porrectum Nordst. & Hirn; Hirn, Acta Soc. Sci. Fenn. 27: 186. 1900. Dioecious, macrandrous; oogonium 1, oblong, operculate, division superior; oospore ellipsoid or globose-ellipsoid, not filling oogonium longitudinally; spore-wall smooth; antheridia to 4-seriate; sperms 2, division horizontal; female vegetative cell 7-10 by 25-55 u, male 6-9 by 25-62 4; oogonium 24-27 by 44-53 yp; oospore 23-24 by 25-28 uw; antheridium 6~7 by 6-8 u. TYPE LOCALITY: Brazil. DISTRIBUTION: Indiana, Florida, Wyoming. PuaTE 21. f. 321, 322. 109. Oedogonium Welwitschii W. & G. West, Jour. Bot. 35: 5. 1897. Dioecious, macrandrous; oogonia 1-3, subovoid-globose, operculate, division superior; oospore globose, filling or not filling oogonium; spore-wall smooth; antheridia 2; female vegeta- tive cell 20-28 by 25-84 », male 17-20 by 35-80 u; oogonium 43-50 by 43-52 4; oospore 35-43 by 35-42 w; antheridium 16-18 by 7-9 p. TYPE Locaity: Africa. DISTRIBUTION: I'inois, Iowa, Alabama. PuateE 21. f. 334, 335. 110. Oedogonium iowense Tiff. Ohio Jour. Sci. 24: 181. 1924. Dioecious, macrandrous; oogonia 1 or 2, globose or ellipsoid-globose, operculate, division superior: oospore of the same form as the oogonium, which it completely fills or not; spore-wall smooth; antheridia 1-25; sperms 2, division horizontal; basal cell of filament commonly elongate; vegetative cell 10-16 by 44-100 2; oogonium 52-60 by 60-80 4; eospore 45-56 by 50-64 yw; antheridium 10-12 by 10-20 u; basal cell 16-24 by 60-80 u. TYPE LOCALITY: West Lake Okoboji, Iowa. DIstRIBuTION: Ohio, Indiana, lowa, Kentucky, Florida. PLATE 21. f. 331-333. 111. Oedogonium Pithophorae Wittr. Bot. Notiser 1878: 141. 1878. Monoecious; oogonium 1, pyriform-globose, operculate, division superior; oospore globose, almost filling oogonium; spore-wall smooth, often thick; antheridium 1-?, subepigynous; basal 52 NORTH AMERICAN FLORA [VoLuME 11 cell elongate; vegetative cell 9-11 by 24-48 uw; oogonium 26-30 by 27-35 4; oospore 25-29 by 24-29 uw; antheridium 8-10 by 7-9 x. TYPE LOCALITY: St. Thomas, West Indies. DISTRIBUTION: St. Thomas. PLATE 22. f. 350. 112. Oedogonium loricatum Hirn, Acta Soc. Faun. FI. Fenn. 118: 22. 1895. Monoecious; oogonium 1 (rarely 2), subpyriform-globose, sometimes subglobose, opercu- late, division superior; oospore subglobose or subdepressed-globose, quite filling oogonium; spore-wall smooth; antheridia I or 2, subepigynous; sperms 2, division horizontal; vegetative cell 8-11 by 30-75 u; oogonium 23-28 by 23-40 u; oospore 22-26 by 21-24 wu; antheridium 7-8 by 5-7 uw. Type LocaLity: Finland. DISTRIBUTION: Puerto Rico. PLATE 21. f. 327. 113. Oedogonium amplius (W. R. Taylor) Tiff. Ohio Jour. Sci. 34: 325. 1934. Oedogonium pyrulum var. amplins W.R. Taylor, Proc. Acad. Phila. 80: 107. 1928. Monoecious; oogonium 1, subglobose-pyriform, operculate, division superior; oospore globose, not filling oogonium, its wall smooth; antheridia 1 or 2, subepigynous; basal cell elon- gate; vegetative cell 9-12 by 40-64 4; oogonium 34-40 by 30-44 u; oospore 26-28 by 26-28 p; antheridium 10-11 by 6-7 xz. TYPE LOCALITY: Purcell Range, British Columbia. DISTRIBUTION: British Columbia. PLATE 21. f. 328. 114. Oedogonium pyriforme Wittr. Nova Acta Soc. Sci. Upsal. IIT. 9%: 39. 1874. Monoecious; oogonium 1, pyriform, operculate, division superior; oospore pyriform, filling or not filling oogonium; spore-wall smooth; antheridia 1-3, subepigynous, epigynous, hypogy- nous, or scattered; sperms 2, division horizontal; vegetative cell 13-16 by 48-90 4; oogonium 40-46 by (44)48-60 »; oospore 36-42 by 36-44 uw; antheridium 10-12 by 8-12 u. TYPE LocALITY: Tasmania. DISTRIBUTION: Wyoming; British Columbia. PLATE 22. f. 349. 115. Oedogonium crispum (Hassall) Wittr. Nova Acta Soc. Sci. Upsal. TII. 93:10. 1874. ? Vesiculifera vernalis Hassall, Ann. Mag. Nat. Hist. 11: 434. 1843. Vesiculifera crispa Hassall, Hist. Brit. Fresh-w. Algae 1: 203. 1845. ? Vesiculifera Candollei Hassall, Hist. Brit. Fresh-w. Algae 1: 208. 1845. Oedogonium rostellatum Pringsh. Jahrb. Wiss. Bot. 1:69. 1857. Oedogonium vernale Wittr. Nova Acta Soc. Sci. Upsal. TIT. 98: 10. 1874. Oedogonium crispum var. elongatum Wittr. Oefv. Sv. Vet.-Akad. Férh. 33°: 45. 1876. Ocedogonium hispanicum Lewin, Bih. Sv. Vet.-Akad. Handl. 141: 16. 1888. Oedogonium crispum {. vernale Hirn, Acta Soc. Sci. Fenn. 27: 161. 1900. Monoecious; oogonium usually 1, obovoid-globose, operculate, division superior; oospore globose or subglobose, quite filling the oogonium; spore-wall smooth; antheridia 1-5, sub- epigynous or hypogynous; sperms 2, division horizontal; basal cell elongate; terminal cell apically obtuse; vegetative cell (10)12-16 by 35-80 4%; oogonium 37-45 by 41-53 uw; oospore 35-43 by 37-43 y; antheridium 8-14 by 7-12 p. Parr 1, 1937] OEDOGONIACEAE 53 TYPE LOCALITY: England. DistRIBUTION: Massachusetts, Pennsylvania, Ohio, Michigan, Indiana, Illinois, lowa, Kentucky, North Carolina, Florida, Alabama, Mississippi, Oklahoma, Colorado, W: i lifornia; ‘ British Columbia; Greenland; Puerto Rico. Beare ones eae nena eae PLATE 22. f. 336, 337. ; \l5a. Oedogonium crispum f. inflatum Hirn, Acta Soc. Sci. Fenn. 27: 161. 1900. Oedogonium vesicatum var. flavescens Kiitz.; Rab. Alg. Sachs. 271. 1853, Oedogonium rostellatum Pringsh.; Rab. Alg. Eur. 2275. 1872. Oogonium obovoid-globose; vegetative cell 12-16 by 35-95 2; oogonium 40-50 by 45-53 4; oospore 37-45 by 38-45 »; antheridium 8-12 by 9-12 ». ‘TvPH LOCALITY: Europe. DISTRIBUTION: Michigan, Florida, Mississippi. PLATE 22. f. 341, 1158. Oedogonium crispum var. gracilescens Wittr.; Wittr. & Nordst. Algae Exsicc. 509. 1883; Bot. Notiser 1883: 148. 1883. Oedogonium Lagerheimii Wittr.; Wittr. & Nordst. Algae Exsicc. 1018, in part. 1893; Bot. Notiser 1893: 192. 1893. More slender than the species; oogonium varying from obovoid-globose to subellipsoid; oospore globose to ovoid; vegetative cell 10-14 by 30-70 2; oogonium 33-39 by 33-51 u; oospore 32-37 by 33-42 py; antheridium 9-10 by 7-9 ». Type Locatity: Brazil. DistRmuTION: Massachusetts, Ohio, Michigan, Illinois, Min- nesota, Iowa, Missouri, Kentucky, Mississippi, Louisiana, Oklahoma. P uate 22. f. 338. 115c. Oedogonium crispum var. uruguayense Magnus & Wille; Wille, Bih. Sv. Vet.-Akad. Handl. 8!8: 39. 1884. Oedogonium crispum {. gracile Wittr. & Nordst. Algae Exsicc. 704, 1886. Oedogonium crispum vax. uruguayense f. proprium Hirn, Acta Soc. Sci. Fenn. 27: 164. 1900. Oogo- nium subobovoid-globose, usually filled by oospore; antheridia subepigynous or hypogynous or scattered ; vegetative cell 10-14 by 16-51 4; oogonium 30-38 by 30-45 4; oospore 27-35 by 27-37 xn; antheridium 8-13 by 6-12». Type LocaLity: Uruguay. DisrrinuTion: Massachusetts, Pennsyl- vania. PLATE 22. f. 339. 115d. Oedogonium crispum var. hawaiense Nordst. Minneskr. Fys. Sallsk. Lund 7:20. 1878. Oogonium subovoid-globose to pyriform-globose, not filled by oospore; terminal cell mucronate or shortly setigerous; vegetative cell 10-16 by 20-64 »; oogonium 30-38 by 31-38 »; oospore 27-32 Dy 27-33 4; antheridium 8-11 by 6-8». Type Locality: Hawaii. DisrripuTion: Florida. PLatEe -f. 342, 115e. Oedogonium crispum var. granulosum Nordst. Oefv. Sv. Vet.-Akad. Férh. 344:24. 1877; Taft, Bull. Torrey Club 62: 285. 1935. Oedogonium crispum f. granulosum Hirn, Acta Soc. Sci. Fenn. 27: 162. 1900. Oogonium subglobose to obovoid-globose, almost completely filled by the oospore; antheridia subepigynous or hypogynous; wall of oospore punctate-granulate; vegetative cell 13-17 by 29-63 p»; cogonium 36-43 by 42-46 u; oospore 34-40 by 34—40 uy; antheridium 8-13 by 7-11». Tyre wocaLiry: Sweden. DISTRIBUTION: Oklahoma. PLate 22. f. 340. 116. Oedogonium obesum (Wittr.) Hirn, Acta Soc. Sei. Fenn. 27: 166. 1900. Oedogonium pyrulum var. obesum Wittr. Oefv. Sv. Vet.-Akad. Férh. 336: 44. 1876. Monoecious; oogonia 1 or 2, obovoid-globose, operculate, division superior; oospore globose, not quite filling oogonium; spore-wall smooth, often thick; anther‘dia 1 or 2, sub- epigynous or more rarely subhypogynous; sperms 2, division horizontal; vegetative cell 12-16 by 35-75 u; oogonium 40-43 by 38-44 u; oospore 33-35 by 33-35 uw; antheridium 11-14 by 10-15 p. TYPE LOCALITY: Austria. DISTRIBUTION: Massachusetts; Puerto Rico. PLATE 22. f. 351, 352. 117. Oedogonium autumnale Wittr. Nova Acta Soc. Sci. Upsal. III. 93: 11. 1874. Monoecious; oogonium 1, obovoid-globose, operculate, division superior; oospore globose or subglobose, completely filling oogonium (or nearly so); spore-wall smooth; antheridia 1 or 2, subepigynous, hypogynous, or scattered; sperms 2, division horizontal; basal cel! elongate; terminal cell broadly apically acute; vegetative cell 16-20 by 25-50 yn; oogonium 39-45 by 45-51 ; oospore 37-42 by 37-44 uw; antheridium 15-18 by 9-104. TYPE LOCALITY: Sweden. DISTRIBUTION: Massachusetts, Pennsylvania, Iowa. PLATE 22. f. 354. 118. Oedogonium rupestre Hirn, Acta Soc. Sci. Fenn. 27: 168. 1900. Oedogonium rupestre {. pseudautumnale Hirn, Acta Soc. Sci. Fenn. 27: 169. 1900. Monoecious; oogonium 1, suboboviform-globose, with superior operculum; oospore glgpose, not filling oogonium, its wall smooth; antheridia 1-3, subepigynous or hypogynous; sPerms 2, 54 NORTH AMERICAN FLORA (VoLUME 11 division horizontal; vegetative cell 20-27 by 26-67 uw; oogonium 45-58 by 45-60 4; oospore 43-54 by 43-54 uw; antheridium 18-22 by 9-144. TYP LOCALITY: Europe. DISTRIBUTION: Mississippi. PLATE 22. f. 348. 119. Oedogonium gracillimum Wittr. & Lundell; Wittr. Nova Acta Soc. Sci. Upsal. IIT. 9:15. 1874. Monoecious; oogonium 1, oblong, operculate, division superior; oospore oblong-ellipsoid, not filling oogonium; spore-wall smooth; antheridium 1; sperms 2, division horizontal; basal cell elongate; vegetative cell 4-7 by 16-42 u; oogonium 14-19 by 34-40 u; oospore 13-17 by 24-32 w; antheridium 3-5 by 4-7 u. TYPE LocaLity: Sweden. DISTRIBUTION: Pennsylvania, Ohio, Michigan, Indiana, Illinois, Iowa, Kentucky, Florida, Alabama, Mississippi; Puerto Rico. PLATE 22. f. 353. 120. Oedogonium oblongellum Kirchner; Hirn, Acta Soc. Sci. Fenn. 27: 182. 1900. Monoecious; oogonium 1, ellipsoid-obovoid, operculate, division superior; oospore ellip- soid, nearly filling oogonium; spore-wall smooth; antheridia 1 or 2, hypogynous or scattered; sperms 2, division horizontal; terminal cell obtuse; vegetative cell 7-9 by 11-36 4; oogonium 20-24 by 25-33 uw; oospore 18-22 by 24-30 uw; antheridium 6-8 by 4-12 un. TYPE LOCALITY: Germany. DISTRIBUTION: Illinois, Mississippi. PLATE 22. f. 347. 121. Oedogonium Hallasiae Tiff. Ohio Jour. Sci. 34:325. 1934. Ocedogonium sphaericum Hallas, Bot. Tidssk. 26: 406. 1905. Not O. sphaericum Kiitz. Oedogonium oblongum {. sphaericum Hirn, Acta Soc. Sci. Fenn. 343: 18. 1906. Ocedogonium oblongum var. sphaericum Taft, Bull. Torrey Club 62: 288. 1935. Monoecious; oogonium 1, oblong, with superior operculum (sometimes nearly supreme); oospore globose to globose-ovoid, not filling oogonium lengthwise, its wall smooth; antheridia 1-3, sperms 2, division horizontal; basal cell elongate; vegetative cell 5—11 by 20-86 u; oogonium 21-28 by 30-52; oospore 16-27 by 16-30 y; antheridium 8-9 by 6-7 4; basal cell 5-9 by 65-72 p. TYPE LOCALITY: Denmark. DISTRIBUTION: Oklahoma. PLATE 21. f. 329, 330. 122. Oedogonium oblongum Wittr. Bot. Notiser 1872: 2. 1872. Monoecious; oogonium 1, oblong, operculate, division superior; oospore ellipsoid to ovoid, not filling oogonium longitudinally; spore-wall smooth; antheridia 1-3, sperms 2, division horizontal; basal cell elongate; ‘vegetative cell 6-11 by 20-86 un; oogonium 20-26 by 41-60 p; oospore 19-23 by 30-36 u; antheridium 6-9 by 7-9 yu. TYPE LOCALITY: Sweden. DIsTRIBUTION: Michigan, Indiana, Illinois, Iowa, Florida, Mississippi. PLATE 22. f. 343. 122¢, Oedogonium oblongum var. majus Nordst.; Wittr. Oefv. Sv. Vet.-Akad. Férh. 33°: 45. 1876. Oedogonium oblongum f. majus (Nordst.) Hirn, Acta Soc. Sci. Fenn. 27: 185. 1900. Vege- tative cell 8-11 by 35-75 2; oogonium 26-28 by 42-50 »; oospore 22-26 by 31-34 uw; antheridium 8-9 by 9-10 4. Type Locatiry: Europe. DistRipuTIon: Michigan. PLATE 22. f. 344. Part 1, 1937] OEDOGONIACEAE 53 123. Oedogonium Ahlstrandii Wittr.; Wittr. & Nordst. Algae Exsicc. 401, in part. 1882; Bot. Notiser 1882: 53. 1882. Monoecious; oogonium 1, ellipsoid, operculate, division superior; oospore ellipsoid, filling oogonium, its wall smooth; antheridia 1 or 2, hypogynous; sperms 2, division horizontal; ter- minal cell apically obtuse; vegetative cell 10-18 by 30-180 un; oogonium 35-42 by 57-69 u; oospore 34-41 by 53-62 uw; antheridium 13-17 by 9-12 u. ‘TYPE LOCALITY: Sweden. DISTRIBUTION: New York, Florida. PLATE 22. f. 355. 124. Oedogonium pachydermum Wittr. & Lundell; Wittr. Oefv. Sv. Vet.-Akad. Férh. 27: 125. 1870. Monoecious; oogonium 1 (rarely 2), ellipsoid, operculate, division superior, wall frequently thick; oospore ellipsoid, not filling oogonium; spore-wall smooth; antheridia 1-3, hypogynous or subepigynous, often terminal; sperms 2, division horizontal; basal cell elongate; terminal cell apiculate; vegetative cell 21-27 by 34-120 »; oogonium 50-70 by 75-100 4; oospore 40-60 by 50-80 uw; antheridium 18-21 by 10-12 u. TYPE LOCALITY: Sweden. DistTRiBUTION: Michigan, Indiana, Wyoming. PLATE 23. f. 359, 360. 125. Oedogonium Huntii H. C. Wood, Proc. Am. Phil. Soc. 10: 335. 1867. Androgynia Huntii H. C. Wood, Fresh-w. Algae N. Am. 197. 1873. Dioecious, nannandrous; oogenium usually 1, subglobose or subobovoid-globose (rarely subhexagonal), pore inferior; oospore globose, not filling oogonium; outer spore-wall with four raised spiral ribs; basal cell elongate; terminal cells tapering, setiferous (consisting of 10 or more superimposed long cylindric cells, each smaller in diameter than the one below); dwarf male nearly straight, on suffultory cell, antheridia exterior, 1 or 2 (?); vegetative cell 15-25 by 36— 82; oogonium 50-60 by 52-60 4; oospore 38-42 by 38-42 4; dwarf male stipe 11 by 52 y; antheridium 10 by 30 p#. Type LOCALITY: Philadelphia, Pennsylvania. DistRIBUTION: Massachusetts, Pennsylvania. Piare 30. f. 471-473. 126. Oedogonium hispidum Nordst.; Wittr. Oefv. Sv. Vet.-Akad. Forh. 27: 128. 1870. Dioecious, nannandrous, gynandrosporous; oogonium 1, terminal, subellipsoid or ellipsoid- globose, pore inferior; oospore globose to globose-ellipsoid, not filling oogonium or rarely en- larging it; outer spore-wall echinate; androsporangia 2; terminal cell obtuse; dwarf male a little curved, on suffultory cell, antheridium exterior, 1; vegetative cell 9-14 by 36-130 »; oogonium 35-44 by 42-56 n; oospore (with spines) 32-39 by 32-40 »; androsporangium 10-12 by 6-8 n; dwarf male stipe 7-8 by 17-18 »; antheridium 5-6 by 7-9 u. TYPE LOCALITY: Sweden. DISTRIBUTION: Michigan. PLATE 30. f. 477. 127. Oedogonium fuscum Taft, Bull. Torrey Club 62: 286. 1935. Dioecious, nannandrous, gynandrosporous; oogonium single, ellipsoid-globose to globose, pore median to inframedian ; oospore ellipsoid-globose to globose, completely filling the oogonium or not; outer spore-wall reticulate-verrucose, brown, suffultory cell enlarged; androsporangia 2-3, epigynous; dwarf male slightly curved, on suffultory cell; anthcridia 1 or 2, exterior; 56 NORTH AMERICAN FLORA [VOLUME 11 vegetative cell 10-17 by 33-73 y; suffultory cell 23-27 by 50-53 u; oogonium 36-43 by 46- 56 »; oospore 34-40 by 42-46 u; androsporangium 10-11 by 7-10 xu, dwarf male stipe 7-9 by 20-23 w; antheridium 6-7 by 5-7 uz. Type LocaLity: Oklahoma. DistTRIBUTION: Oklahoma. PLATE 30. f. 474-476. 128. Oedogonium canadense (Tiff.) Tiff. Ohio Jour. Sci. 34: 325. 1934. Oedogonium Hystrix Skuja, Acta Horti Univ. Latv. 2:99. 1927. Not O. Hystvix Wittr. 1870. Oedogonium Hystrix var. canadense Tiff. Ohio Jour. Sci. 29:74. 1929. Dioecious, nannandrous, gynandrosporous; oogonium 1, ellipsoid, pore inframedian; oospore broadly ellipsoid, not quite filling oogonium, its outer wall echinate; androsporangium 1-?; dwarf male slightly curved, on suffultory cell, antheridium exterior, 1; suffultory cell enlarged; vegetative cell 14-25 by 80-125 wu; suffultory cell 24-30 by 64-72 u; oogonium 40-53 by 52-64 u; oospore 38-48 by 40-60 uw; androsporangium 16-20 by 15-30 pn; dwarf male-stipe 9-12 by 28-40 u; antheridium 7-8 by 8-14 nz. TYPE LOCALITY: British Columbia. DISTRIBUTION: British Columbia. Piate 30. f. 478. 129. Oedogonium nebraskense Ohashi, Bot. Gaz. 82: 213. 1926. Dioecious, nannandrous, gynandrosporous; oogonia 1-4, flask-shaped or obovoid, pore supramedian; oospore subspheric or ovoid, not quite filling oogonium; outer layer of spore- wall smooth, middle layer punctate, inner layer smooth; androsporangia 1-4; basal cell elongate; terminal cell attenuate-obtuse; dwarf male curved, on suffultory cell, antheridia exterior, 1-4; vegetative cell slightly capitellate; filament 20-41(50)-celled; vegetative cell, terminal 9-12 by 170-305 p, median 20-27 by 57-160 u, basal 22-35 by 79-230 yu; suffultory cell 41-58 by 93- 130 u; oogonium 60-67 by 70-79»; oospore 53-64 by 60-764; androsporangium 20-25 by 22-40 »; dwarf male stipe 12-19 by 47-68 »; antheridium 9-13 by 17-20 pu. Tvypr LocaLity: Lincoln, Nebraska. DISTRIBUTION: North Carolina, Iowa, Nebraska, Oklahoma, Wyoming. PLATE 30. f. 468-470. 1294. Oedogonium nebraskense var. Whitfordii Tiffany, var. nov. Oedogonium nebraskense L. Whitford, Jour. Elisha Mitchell Soc. 52:94. 1936. Not O. nebraskense Ohashi. 1926. Larger; oogonium 74-78 by 105-109 »; oospore 55-65 by 65-75 4. TPE LocaLity: North Carolina. Dis- TRIBUTION: North. Carolina. 130. Oedogonium hystricinum Transeau & Tiff. Ohio Jour. Sei. 19: 240. 1919. Dioecious, nannandrous, idioandrosporous; oogonium 1, globose or somewhat obovoid, pore median; oospore globose to subglobose, nearly filling the oogonium; outer spore-wall densely covered with spines; suffultory cell swollen; androsporangia 3—6; terminal cell obtuse; basal cell elongate; dwarf male nearly straight, resting on the suffultory cell, antheridium ex- terior, 1; female vegetative cell 8-15 by 42-100 », male 6-9 by 50-67 yu; suffultory cell 16-19 by 42-70 u; oogonium 30-40 by 36-53 2; oospore (including spines) 23-38 by 28-43 y; andro- sporangium 6-8 by 8-15 »; dwarf male stipe 6-10 by 20-32 uw; antheridium 5-6 by 6-10 un. Tyre LocaLiIty: Charleston, Illinois. DISTRIBUTION: Massachusetts, Michigan, Illinois, Iowa, Florida; Puerto Rico. PLATE 30. f. 481, 482. 131. Oedogonium Aster Wittr. Bot. Notiser 1872: 5. 1872. Dioecious, nannandrous; oogonium 1, subdepressed-globose, pore median; oospore sub- depressed-globose or subglobose, not completely filling oogonium; outer layer of spore-wall Part 1, 1937] OEDOGONIACEAE 57 echinate; suffultory cell sometimes a little swollen; terminal cell obtuse; dwarf male a little curved, on suffultory cell, stipe sometimes 2-celled, antheridia exterior, 1 or 2; vegetative cell 7-13 by 50-110; oogonium 33-37 by 30-39; oospore (with spines) 29-32 by 25-304n; dwarf male stipe 6-7 by 20-25 yw; antheridium 5-6 by 7-8 yu. Type LOCALITY: Sweden. DISTRIBUTION: Illinois, Oklahoma. PLATE 30. f. 486. 132. Oedogonium pungens Hirn, Acta Soc. Sci. Fenn. 27: 199. 1900. Dioecious, nannandrous, gynandrosporous; oogonium JI, subdepressed-globose (or nearly subglobose), pore median or a little above median; oospore subglobose, almost filling oogonium; outer spore-wall echinate; androsporangium 1—?, hypogynous; dwarf male a little curved, on suffultory cell, antheridia exterior, 1 or 2; vegetative cell 12-16 by 50-128 »; oogonium 40-48 by 40-50; oospore (with spines) 37-44 by 35-43 wu; androsporangium 14-16 by 10-15 y; dwarf male stipe 9-12 by 20-30 uw; antheridium 6-7 by 8-12 un. TYPE LOCALITY: South Carolina, DISTRIBUTION: Massachusetts, Illinois, North Carolina, South Carolina, Oklahoma. PLatE 30. f. 483, 484. 133. Oedogonium echinospermum A. Br.; Kiitz. Sp. Alg. 366. 1849. Dioecious, nannandrous, gynandrosporous or idioandrosporous; oogonium 1, ellipsoid- globose or subglobose, pore median; oospore globose, quite filling oogonium; outer layer of spore- wall echinate; androsporangia 1-5; dwarf male a little curved, on suffultory cell, antheridia exterior, 1 or 2; vegetative cell 18-30 by 45-130 uw; oogonium 39-50 by 41-57 »; oospore (with spines) 38-47 by 38-49 »; androsporangium 21-25 by 9-15 »; dwarf male stipe 10-15 by 26- 35 w; antheridium 6-12 by 6-15 nz. TYPE LOCALITY: Europe. DISTRIBUTION: Massachusetts, New York, New Jersey, Pennsylvania, Ohio, Michigan, Illinois, Alabama, Mississippi, Oklahoma; British Columbia. PLATE 31. f. 487. 133a. Oedogonium echinospermum var. horridum Him, Acta Soc. Sci. Fenn. 27: 201. 1900. Oedogonium echinospermum var. Wolle, Fresh-w. Alg. U. S. 86. 1887. Larger, with longer and den- ser spines; antheridium pluricellular. Tyex Locatity: Florida, DIsTRIBUTION: Florida. PLaTEe 31. f. 488. 134. Oedogonium Hystrix Wittr. Oefv. Sv. Vet.-Akad. Férh. 27: 133. 1870. Dioecious, nannandrous, gynandrosporous (or possibly idioandrosporous); oogonium 1, ellipsoid, pore median or occasionally below median; oospore ellipsoid, nearly filling oogonium; outer spore-wall echinate; androsporangia 1-3; terminal cell obtuse; dwarf male slightly curved, on suffultory cell; antheridium exterior, 1; vegetative cell 17-28 by 30-120 y; oogonium 38-48 by 45-65 u; oospore 37-46 by 43-55 y; androsporangium 16-18 by 13-18 4; dwarf male stipe 10-11 by 22-25 wu; antheridium 6-8 by 9-14 yu. Type LocaLity: Sweden. DisTRIBUTION: Pennsylvania; British Columbia. PLATE 31. f. 489. 135. Oedogonium spiripennatum Jao, Rhodora 36: 210. 1934. Dioecious, nannandrous, idioandrosporous (2); oogonium solitary, subglobose to obovoid- globose, pore median; oospore globose or subglobose, filling the oogonium; spore-wall of three layers, the median and inner smooth, the outer finely granulate, with 5-7 spiral, toothed, membranous-winged ribs uniting at the poles, the polar axis always placed in a transverse position, never parallel with the filament; suffultory cell swollen; dwarf male a little curved, on the suffultory cell, rarely on the oogonium or near the suffultory cell; stipe cell 1-2; an- 58 NORTH AMERICAN FLORA [VoLuME 11 theridium |, exterior; sperm 1; lower vegetative cell of the filament generally more slender than the upper; basal cell slightly enlarged, with lobed holdfast; terminal cell apically obtuse; vegetative cell 16-22 by 44-90 y; suffultory cell 25-32 by 64-80 4; oogonium 48-58 by 48-61 y; oospore 44-54 by 41-51 u; dwarf male stipe: upper cell 6~8 by 38-48 y, lower cell 9-13 by 35~45 yw; antheridium 6-8 by 38-48 yu; basal cell 19-20 by 60-61 pn. TYPE LOCALITY: Woods Hole, Massachusetts. DISTRIBUTION: Massachusetts. Piates 32. f. 504; 36. f. 557. 136. Oedogonium exospirale Tiff. Ohio Jour. Sci. 24: 184. 1924. Dioecious, nannandrous, idioandrosporous; oogonium 1 (rarely 2), subglobose or obovoid- globose (rarely subhexagonal), pore median; oospore globose or subglobose, nearly filling the oogonium ; spore-wall of two layers, the outer marked by 5-8 spiral ribs uniting at the poles, the polar axis always placed in a transverse position, never parallel with the filament, the inner layer smooth; suffultory cell swollen; androsporangia 1-6; basal cell elongate; dwarf male a little curved, situated on the suffultory cell, with exterior antheridia 1-3; vegetative cell 8-15 by 60-88 yu; suffultory cell 16-28 by 60-88 yu; oogonium 40-44 by 44-48 yu; oospore 32-38 by 38—40 yu; androsporangium 12-16 by 14-204; dwarf male stipe 14-16 by 30-40 4; antheridium 8-12 by 14-16 p. TYPE LoOcALItTy: Spirit Lake, Iowa. DISTRIBUTION: Iowa, Ohio, Mississippi; Puerto Rico. Pate 31. f. 501-503. 137. Oedogonium illinoiense Transeau, Am. Jour. Bot. 1: 299. 1914. Dioecious, nannandrous, gynandrosporous; oogonium 1, subglobose to obovoid-globose, pore median; oospore globose or subglobose, nearly filling oogonium; outer spore-wall with 4-7 spiral ribs, uniting at poles, the polar axis always transverse to axis of filament: suffultory cell enlarged; androsporangia 1-5; basal cell elongate; dwarf male slightly curved, on suffultory cell; antheridia exterior, 1-4; vegetative cell 13-18 by 80-140 yu; suffultory cell 32-40 by 50-80 ys; oogonium 51-60 by 60-70 u; oospore 45-56 by 48-66 uv; androsporangium 13-17 by 17-22 u; dwarf male stipe 14-17 by 37-57 yu; antheridium 9-12 by 15-23 p. Type LocaLity: Lerna, Illinois. DIsTRIBUTION: Illinois, Kentucky, Mississippi, Florida. PLATE 31. f. 494-496. 1372. Oedogonium illinoiense var. oklahomense Taft, Bull. Torrey Club 62: 287. 1935. Idioandrosporous; outer spore-wall with 4-6 spiral ribs, not united at the poles; basal cell elongate; antheridium 1, exterior; vegetative cell 10-20 by 73-125 y; suffultory cell 26-34 by 69-75 »; oogonium 49-56 by 60-65 »; oospore 43~46 by 43-46 »; dwarf male stipe 11-13 by 38-46 4; antheridium 7-9 by 12-13 4. Type cocaity: Oklahoma. DrstRIBUTION: Oklahoma. Pate 31. f- 497-499. 138. Oedogonium acutum (W. & G. West) Tiff. Ohio Jour. Sei. 34: 325. 1934. Oedogonium spirale var. acutum W. & G. West, Trans. Linn. Soc. II. 6: 128. 1902. Dioecious, nannandrous, idioandrosporous; oogonium 1, subglobose to ovoid-globose, pore median; oospore globose, not filling oogonium; outer layer of wall with 4-7 spiral costae, anastomosing, irregularly and acutely dentate, inner layer smooth; antheridium exterior, single; vegetative cell 20-26 by 70-106 u; oogonium 46-56 by 54-60 4; oospore 37-45 by 37-45 yu; dwarf male stipe 9-12 by 34-44 «; antheridium 8-9 by 14-18 zp. TYPE LocaLity: Ceylon. DISTRIBUTION: Mississippi. PLATE 31. f. 493. Par? 1, 1937] OEDOGONIACEAE 59 139. Oedogonium spirale Hirn, Acta Soc. Sci. Fenn. 27: 201. 1900. Dioecious, nannandrous, idioandrosporous; oogonium 1, subglobose or obovoid-globose, pore median; oospore globose or subglobose, not filling oogonium; spore-wall double, the outer layer with 4~7 spiral ribs, anastomosing, united at the poles, the inner smooth; androsporangia 1-3; basal cell elongate; dwarf male a little curved, near oogonium, antheridium exterior, 1; vegetative cell 20-33 by 40-130; oogonium 52-60 by 52-604; oospore 46-56 by 46-56 yp; androsporangium 17-22 by 11-144; dwarf male stipe 11-16 by 41-59; antheridium 10-11 by 18-20 p. TYPE LOCALITY: Java. DISTRIBUTION: Florida. Puate 31. f. 490-492. 140. Oedogonium depressum Pringsh. Jahrb. Wiss. Bot. 1:69. 1857. Dioecious, nannandrous, gynandrosporous; oogonium 1 (rarely 2), globose to subglobose, pore median; oospore depressed-globose, not filling oogonium, its wall smooth; androsporangia 2; dwarf male oblong-obovoid, on oogonium, antheridium interior; vegetative cell 8-9 by 25-54 yp; oogonium 28 by 26 »; oospore 23 by 17-18 uw; dwarf male 4-5 by 14-16 n. Type LOcALITy: Germany. DIstRIBUTION: Michigan; Greenland. PLATE 32. f. 507. 141. Oedogonium Braunii Kiitz. Sp. Alg. 366. 1849. Oedogonium calcareum var. gaditanum Lewin, Bib. Sv. Vet.-Akad. Handl. 141: 18. 1888. Dioecious, nannandrous, gynandrosporous; oogonium 1, ovoid to subglobose, pore median; oospore globose, not filling oogonium; spore-wall smooth; androsporangia 1 or 2; basal cell elongate; terminal cell apically obtuse; dwarf male usually on suffultory cell, stipe somewhat curved; antheridium exterior, 1; vegetative cell 13-15 by 25-60 yu; suffultory cell 16-20 by 28~50 »; oogonium 30-37 by 33-43 wu; oospore 27-33 by 27-33 u; androsporangium 13-15 by 11-12 4; dwarf male stipe 7-12 by 20-28 uw: antheridium 5-8 by 9-10 p. TYPE Locaity: Europe. DISTRIBUTION: Massachusetts, New Jersey, Pennsylvania, Michigan, IIlinois, Iowa, North Carolina, Oklahoma; British Columbia. PuLaTE 32. f. 505. 142. Oedogonium gallicum Hirn, Acta Soc. Sci. Fenn. 27:197. 1900. Oedogonium flavescens var. minus Taft, Bull. Torrey Club 62: 285. 1935. Dioecious, nannandrous, idioandrosporous; oogonia | or 2, globose to subhexagonally globose, pore about median; oospore of same form as oogonium and quite filling it; spore-wall smooth; dwarf male suberect, on suffultory cell (rarely oogonium), antheridia exterior, 1 or 2; vegetative cell 17-22 by 51-120 u; oogonium 39-48 by 44-54 4; oospore 36-46 by 39-44 4; dwarf male stipe 11-16 by 26-45 4; antheridium 8-10 by 7-13 »,; androsporangium 16-23 by 10-20 p. TYPE LOCALITY: France. DIsTRIBUTION: Michigan, Kentucky, Oklahoma. PuateE 32. f. 511, 512, 516. 143. Oedogonium flavescens Wittr. Oefv. Sv. Vet.-Akad. Forh. 27: 127. 1870. ? Vesiculifera flavescens Hassall, Hist. Brit. Fresh-w. Algae 1: 206. 1845. Seas flavescens var. gynandrosporum Hirn, Acta Soc. Faun. Fl. Fenn. 115: 16. 1895. Dioecious, nannandrous, idioandrosporous or gynandrosporous; oogonium |, ellipsoid- globose to subglobose, pore median; oospore globose, not quite filling oogonium; spore- wall smooth; androsporangia 1-9; dwarf male somewhat curved, on the suffultory cell; antheridia 60 NORTH AMERICAN FLORA (VoLUME I1 1 or 2; vegetative cell 18-23 by 72-140 u; oogonium 49-52 by 51-60 4; oospore 45-49 by 45— 49 4; androsporangium 17-20 by 8-184; dwarf male stipe 11-12 by 36-45 »; antheridium 9-10 by 15-20 p. TYPE LOCALITY: Sweden. : . Steen DIsTRIBUTION: Massachusetts, Ohio, Indiana, Iowa, Minnesota, Alabama, Mississippi. PLATE 32. f. 517. 144. Oedogonium Zehneri (Tiff.) Tiff. Ohio Jour. Sci. 34: 325. 1934. Oedogonium Braunii var. Zehneri Tiff. Bot. Gaz. 83: 204. 1927. Dioecious, nannandrous, gynandrosporous; oogonium 1, ovoid, pore median; oospore ovoid, not filling oogonium lengthwise, its wall smooth; androsporangia 1 or 2, subepigynous; basal cell elongate; dwarf male usually on suffultory cell, stipe of 1-4 cells; antheridium 1, exterior; vegetative cell 12-24 by 34-72 u; suffultory cell 21-32 by 48-52 4; oogonium 40-50 by 48-60 u; oospore 34-44 by 36-50 uw; dwarf male stipe 8-10 by 16-24 yw; antheridium 7-8 by 8-12 pw. TYPE LOCALITY: Vincennes, Indiana. DIstTrRisuTion: Indiana, North Carolina. PLATE 32. f. 506. 145. Oedogonium angulosum Hallas, Bot. Tidssk. 26: 402. 1905. Oedogonium sexangulare var. angulosum Hirn, Acta Soc. Sci. Fenn. 348: 21. 1906. Dioecious, nannandrous, gynandrosporous; oogonium single, sexangular-ellipsoid, pore median or a little above median; oospore sexangular-ellipsoid, nearly filling oogonium, its wall smooth; androsporangia 1-3; dwarf male on suffultory cell or rarely scattered, stipe of 1-3 cells; antheridium exterior; vegetative cell 10-14 by 15-60 4; oogonium 19-30 by 30-42 yu; oospore 17-28 by 21-30 4; androsporangium 10-12 by 12-20 4; dwarf male stipe 6-10 by 18-24 yn; antheridium 6-7 by 7—8 yu. TYPE LOCALITY: Denmark. DIsTRIBUTION: Alabama. PLATE 32. f. 509, 510. 146. Oedogonium sexangulare Cleve; Wittr. Oefv. Sv. Vet.- Akad. Foérh. 27: 131. 1870. Dioecious, nannandrous, gynandrosporous; oogonium 1 (rarely 2), sexangular-ellipsoid, pore a little above median; oospore same form as oogonium and nearly filling it; spore-wall smooth; suffultory cell sometimes slightly tumid; androsporangia 1-3; dwarf male on suffultory cell, a little curved, stipe of 2-3 cells; antheridium exterior, 1; vegetative cell 9-16 by 30-110 y; oogonium 29-33 by 33-39 4; oospore 27-31 by 31-36 u; androsporangium 13-14 by 10-14 4; dwarf male stipe 7~9 by 21-30 w; antheridium 6-7 by 9-12 x. TYPE LOCALITY: Sweden. DIsTRIBUTION: Maine, Massachusetts, New York, Pennsylvania, Michigan, Indiana, Kentucky, Mississippi, Louisiana, Florida. PLATE 32. f. 514. 147. Oedogonium subsexangulare Tiff. Ohio Jour. Sci. 34: 325. 1934. Oedogonium sexangulare var. majus Wille, Forh. Vid.-Selsk. Christiania 1880": 68. 1880. Dioecious, nannandrous, gynandrosporous; oogonium 1, sexangular-ellipsoid, pore median; oospore similar in shape to oogonium and nearly filling it, its wall smooth; suffultory cell slightly enlarged; androsporangia 1 or 2; dwarf male on suffultory cell, antheridium exterior, solitary; vegetative cell 15-23 by 30-68 uw; oogonium 36-42(48) by (36)41-45 #; oospore 34-40 by 39- Part 1, 1937] OEDOGONIACEAE 61 43 w; androsporangium 14-18 by 8-10 4; dwarf male stipe 7-9 by 18-30 u; antheridium 6-8 by 6-10 nz. TyPE LOcaLIty: Norway. DisTRIBUTION: Massachusetts, Alabama, Mississippi. PLATE 32. f. 508. sc 148. Oedogonium magnum (Ackley) Tiff. Ohio Jour. Sci. 34: 325. 1934. Oedogonium multisporum var. magnum Ackley, Trans. Am. Micr. Soc. 48: 305. 1929. Dioecious, nannandrous, idioandrosporous; oogonium 1, subglobose, pore supramedian (rarely median) ; oospore globose to subglobose to depressed-globose, its wall smooth; androspor- angia 1 or 2; dwarf male on or near oogonium or scattered; vegetative cell 14-18 by 30-90 u; suffultory cell 17-21 by 28-90»; oogonium 40-43 by 33-38 wv; oospore 38-41 by 32-36 np; androsporangium 17-18 by 16-22 4; dwarf male stipe 12-14(20) by 24-26(29) wu; antheridium 8-10(12) by 8-10 uw. TYPE LOCALITY: Muskegon Lake, Michigan. DISTRIBUTION: Michigan. PLATE 32. f. 513. 149. Oedogonium excentriporum (Jao) Tiffany, sp. nov. Oedogonium hystricinum var. excentriporum Jao, Rhodora 36: 205. 1934. Dioecious, nannandrous, idioandrosporous (?); oogonium solitary, obovoid-globose, pore supramedian; oospore subglobose to globose, filling the oogonium or rarely nearly filling it; spore-wall of three layers, the median and inner smooth, the outer densely echinate; suffultory cell tumid; dwarf male on suffultory cell, stipe 1-3-celled; antheridium 1, exterior; basal cell sometimes a little tumid, not elongate; terminal cell obtuse; vegetative cell 6-8 by 40-94 u; suffultory cell 12-20 by 47-54; oogonium 32-35 by 38-48 4; oospore 27-32 by 32-35 nu; dwarf male: antheridium 5—6 by 5-12 », stipe 5-7 by 10-21 «, upper cell 3-7 by 9-26 p. TYPE LOCALITY: Woods Hole, Massachusetts. DISTRIBUTION: Massachusetts. PLATE 30. f. 479, 480. 150. Oedogonium stellatum Wittr. Oefv. Sv. Vet.-Akad. Forh. 27: 129. 1870. ? Oedogonium spinospermum Reinsch, Contr. Alg. Fung. 1:81. 1875. Dioecious, nannandrous, gynandrosporous; oogonia 1—3, obovoid-globose, pore superior; oospore globose, quite filling oogonium; outer spore-wall with 4-7 somewhat spirally arranged ribs, appearing definitely dentate on the margin, sometimes anastomosate; androsporangia 1-3, usually subepigynous; basal cell elongate; terminal cell slender, subhyaline, apically obtuse; dwarf male suberect, on suffultory cell; antheridia 1 or 2; vegetative cell 15-35 by 40- 225 w; oogonium 51-64 by 56~70 «; oospore (with ribs) 50-58 by 50-58 wu; androsporangium 14-19 by 13-20 w; dwarf male stipe 11-13 by 45-52 yu; antheridium 6-9 by 8-13 uz. TYPE LOcaLIty: Sweden. Distrispution: Alabama, Florida. PLATE 34. f. 536. 151. Oedogonium incertum Tiff. Ohio Jour. Sci. 34: 326. 1934. Oedogonium cyathigerum f. americanum Wolle, Fresh-w. Algae U.S. 77. 1887. Dioecious, nannandrous, idioandrosporous; oogonium 1, subovoid to somewhat ellipsoid, pore superior; oospore similar in shape to oogonium, its median layer longitudinally costate; dwarf male on oogonium; vegetative cell 17-21 by 22-62 4; oogonium 45-50 by 55-63 4; oospore 39-40 by 44-46 yw; dwarf male 12-15 by 50-54 yz. TYPE LOCALITY: Pennsylvania. DIsTRIBUTION: Pennsylvania. 62 NORTH AMERICAN FLORA [(VoLume 11 152. Oedogonium cyathigerum Wittr. Oefv. Sv. Vet.-Akad. Forh. 27: 131. 1870. Oedogonium cyathigerum var. rumelicum Istv. Term. Fiiz. 13:77. 1890... Oedogonium ornatum Hirn, Oefv. Finska Vet.-Soc. Férh. 38: 20. 1896. Dioecious, nannandrous, idioandrosporous; oogonia 1-3, subovoid or quadrangular- ellipsoid, pore superior; oospore same form as oogonium, filling it; outer layer of spore-wall smooth, the median with 16-25 longitudinal, continuous, rarely anastomosing, often curved, ridges, the inner smooth; basal cell elongate; terminal cell, often an oogonium, obtuse; dwarf male goblet-shaped, curved, on the suffultory cell or oogonium; antheridium interior; vegeta- tive cell 21-30 by 40-300 u; suffultory cell 42-48 by 75-110 «4; oogonium 57-66 by 70-100 x; oospore 51-62 by 60+75 4; androsporangium 23-30 by 12-30 »; dwarf male cell 12-15 by 50-58 p. TYPE LOCALITY: Sweden. DistRBuTION: Ohio, Michigan, Indiana, Illinois, Iowa, Florida, Mississippi, Oklahoma; Puerto Rico. PLATE 35. f. 541, 542. 152a. Oedogonium cyathigerum f. ornatum (Wittr.) Hirn, Acta Soc. Sci. Fenn. 27: 254. 1900. Oedogonium cyathigerum var. ornatum Wittr. Bot. Notiser 1878: 134. 1878. Idioandrosporous; dwarf males elongate; vegetative cell 21-30 by 60-270 »; suffultory cell 39-48 by 60-116 »; oogonium 56-65 by 69-102 »; oospore 54-60 by 65-83 »; androsporangium 21-27 by 13-27 »; dwarf male ae a 60-75 ». Type LOCALITY: Vera Cruz, Mexico. DisrriBuTIon: Vera Cruz. PLaTE 35. f. 544-546. . 152b. Oedogonium cyathigerum var. ellipticum Magnus & Wille; Wille, Bih. Sv. Vet.-Akad. Handl. 818: 40. 1884. Oospore frequently not filling oogonium, quadrangular-ellipsoid or nearly ellipsoid or rarely subglobose; gynandrosporous, androsporangia 1-6; vegetative cell 19-30 by 30— 132 4; suffultory cell 26-46 by 40-125 »; cogonium 50-66 by (59) 68-94 »; oospore 48-65 by 45-66 (73) »; androsporangium 23-26 by 14-19 »; dwarf male 13-18 by 43-59 x. Tyr LOCALITY: Uruguay. DistrisuTIon: Ohio, Oklahoma. PLATE 35. f. 543. 153. Oedogonium perfectum (Hirn) Tiff. Ohio Jour. Sci. 34: 326. 1934. Oedogonium cyathigerum {. perfectum Hirn, Acta Soc. Sci. Fenn. 27: 254. 1900. Dioecious, nannandrous, idioandrosporous; oogonia 1-4, subovoid to quadrangular- ellipsoid, pore superior; oospore of same form as oogonium and filling it; outer layer of wall smooth, middle layer with 16-24 longitudinal, continuous, sometimes anastomosing, often curved ridges, inner layer smooth; androsporangia to 23-seriate; dwarf male goblet-shaped, curved, on suffultory cell or oogonium, antheridium interior; basal cell elongate; vegetative cell 22-35 by 65-3504; suffultory cell 37-56 by 56-1524; oogonium 65-85 by 72-111 4p; oospore 61-80 by 65-85 yw; androsporangium 21-30 by 15-30 u; dwarf male 12-16 by 55-80 uz. TYPE LOCALITY: Brazil. DISTRIBUTION: Ohio, Indiana, Mississippi; Puerto Rico. PLATE 35. f. 547, 548. 154. Oedogonium Wolleanum Wittr. Bot. Notiser 1878: 137. 1878. Oedogonium apophysatum Rab. Alg. Sachs, 291. 1853. Not O. apophvsatum A. Br. 1849. Dioecious, nannandrous, gynandrosporous or idioandrosporous; oogonia 1-4, subobovoid or quadrangular-ellipsoid, pore superior, wall with raised longitudinal lines on the inner surface; oospore of same form as oogonium, quite filling it; outer layer of spore-wall with 25-35 entire longitudinal ribs, rarely anastomosing, inner layer smooth; androsporangia 1-3, often sub- epigynous or scattered in the upper part of the filament; basal cell elongate; terminal cell, sometimes an oogonium, short-acute or acuminate; dwarf male on suffultory cell, stipe slightly curved; antheridia exterior, 1-3; vegetative cell 21-30 by 65-235 yw; suffultory cell 45-56 by 68-110 »; oogonium 58-68 by 69-89 4; oospore 56-66 by 65-83 uw; androsporangium 21-30 by 18-25 4; dwarf male stipe 15-24 by 54-60 »; antheridium 9-14 by 7-11 p. TYPE LOCALITY: Pennsylvania. DISTRIBUTION: Massachusetts, Connecticut, New Jersey, Pennsylvania, Ohio, Indiana, Illinois, Iowa, Minnesota, Florida; Puerto Rico; Greenland. PLATE 36. f. 549, 550. Part 1, 1937] OEDOGONIACEAE 63 154¢a. Oedogonium _Wolleanum var. concinnum Hirn, Acta Soc. Sci. Fenn. 27: 222. 1900. Smaller; cospore not quite filling oogonium; ribs of outer layer of spore-wall finely crenulate; vege- tative cell 19-27 by 80-180 »; suffultory cell 41-52 by 72-150 yu: oogonium 54-63 by 63-93 4g; oospore 52-61 by 62-74 u; dwarf male stipe 16-20 by 50-60 »;antheridium 10-13 by 10-15». Type LocaLity: Minnesota. DISTRIBUTION: Minnesota. PLaTE 36. f. 551. ; 155. Oedogonium striatum Tiff. Ohio Jour. Sci. 34: 326. 1934. seas la pan var. insigne Nordst.; Wittr. & Nordst. Algae Exsicc. 207. 1879; Bot. Notiser Ocedogonium Wolleanum f. insigne Hirn, Acta Soc. Sci. Fenn. 27: 222. 1900. Dioecious, nannandrous, gynandrosporous or idioandrosporous; oogonia 1-10, subobovoid or somewhat ellipsoid, pore superior, wall with raised longitudinal lines on the inner surface; oospore of same form as oogonium, quite filling it, outer layer of spore-wall with 35-40 entire longitudinal ribs, inner layer smooth; androsporangia to 10-seriate, often subepigynous or scattered; basal cell elongate; dwarf male on suffultory cell, stipe slightly curved, antheridia exterior, 1-4; vegetative cell 18-36 by 53-250 u; suffultory cell 57-66 by 100-150 u; oogonium 67-80 by 78-92 u; oospore 64-76 by 74-90 u; androsporangium 19-30 by 18-30 4; dwarf male stipe 18-24 by 54-68 yw; antheridium 12-14 by 10-12 un. TYPE LOCALITY: Sweden. DISTRIBUTION: New Jersey. Prate 36. f. 552, 553, 156. Oedogonium Donnellii Wolle, Bull. Torrey Club 7: 48. 1880; Hirn, Acta Soc. Sci. Fenn. 27: 206. 1900. Dioecious, nannandrous, idioandrosporous; oogonium | (rarely 2), obovoid-globose, pore superior; oospore globose, not filling oogonium; outer layer of spore-wall echinate, spines spirally arranged, spirals 5~7, anastomosing; androsporangia 4-10; dwarf male a little curved, on suf- fultory cell or rarely on oogonium; antheridia exterior, 1 or 2~?; vegetative cell 41-59 by 54- 175 4; oogonium 63-78 by 70-93 yu; oospore (with spines) 60-70 by 60-70 y; androsporangium 40-45 by 10-12 »; dwarf male stipe 16-21 by 63-74 yw; antheridium 14-15 by 8-22 nz. TYPE LOCALITY: Florida. DistriBuTion: Florida. PLATE 34. f. 537. 157. Oedogonium armigerum Hirn, Acta Soc. Sci. Fenn. 27: 203. 1900. ? Oedogonium echinatum H. C. Wood; Wolle, Fresh-w. Algae U. S. 86. 1887. Not O. echinatum Wittr. 1878. Dioecious, nannandrous; oogonium 1, subglobose, pore superior; oospore globose, nearly filling oogonium; outer layer of spore-wall echinate; dwarf male curved, on suffultory cell, stipe sometimes 2~4-celled; antheridia exterior, 1 or 2; suffultory cell sometimes tumid, vegeta- tive cell 9-13 by 36-100 yw; oogonium 29-38 by 30-40 u; oospore 26-30 by 26-29 un; dwarf male, lower cell 7-8 by 20-24», upper cell 4-6 by 21-30; antheridium 5-6 by 7-8 uw; basal cell 9-10 by 45-47 pu. TYPE LOCALITY: Brazil. DIsTRIBUTION: Indiana, Florida, Oklahoma. PLaTe 30. f. 485. 158. Oedogonium echinatum (H. C. Wood) Wittr. Bot. Notiser 1878: 137. 1878. Androgynia echinata H. C. Wood, Fresh-w. Algae N. Am. 198. 1873. Dioecious, nannandrous; oogonium (?) 1, globose, usually depressed, pore superior; oospore globose, distending oogonium; outer layer of spore-wall echinate; dwarf male suberect, near 64 NORTH AMERICAN FLORA (VoLuUME 11 oogonium, antheridium exterior (?), 1; vegetative cell 8-13 by 50-138 4; oogonium 35-36 by 35-36 uw; oospore (without echinations) 25-26 by 25-26 u. TYPE LOCALITY: Pennsylvania. DISTRIBUTION: Pennsylvania. PLaTE 32. f. 515, 159. Oedogonium concatenatum (Hassall) Wittr. Nova Acta Soc. Sci. Upsal. ITI. 9%: 25. 1874. Vesiculifera concatenata Hassall, Hist. Brit. Fresh-w. Algae 1: 201. 1845. Oedogonium apophysatum Pringsh. Jahrb. Wiss. Bot. 1: 71. 1857. Not O. apophysatum A. Br. 1849. Oedogonium concatenatum var. lagenarioides Filar. Math. Term. Kézlem 27: 785. 1901. Dioecious, nannandrous, gynandrosporous; oogonia 1-6, subovoid or quadrangular- ellipsoid, pore superior; oospore of same form as oogonium, nearly filling it; outer layer of spore- wall smooth, the middle with pits more or less distinctly arranged in 30-35 longitudinal series, the inner wall smooth; suffultory cell swollen; androsporangia 1-4; basal cell elongate; terminal cell obtuse; dwarf male curved, on suffultory cell; antheridia exterior, 1-4; vegetative cell 25-40 by 75-400 yu; suffultory cell 50-62 by 88-155 yw; oogonium 63-83 by 76-105 u; oospore 60-75 by 67-95 uw; androsporangium 25-28 by 15-364; dwarf male stipe 17-25 by 50-75 u; antheridium 13-15 by 12-25 pu. TYPE LOCALITY: Europe. DISTRIBUTION: Massachusetts, New York, New Jersey, Pennsylvania, Michigan, Indiana, Illinois, Iowa, Oklahoma; British Columbia; Alaska. PLATE 34. f. 538. 159a. Oedogonium concatenatum var. superornatum Tiffany, var. nov. Oedogonium con- catenatum Skuja, Acta Horti Bot. Univ. Latv. 4: 32. 1930. Not O. concatenatum Wittr. 1874. Smaller; onspere ellipsoid to globose; longitudinally arranged pits in 40-62 series; vegetative cell (19) 25-45 by 64-160 u; suffultory cell 51-61 by 115-134 4; oogonium 56-77 by 68-112 ug; oospore 57-74 by 64-83 »; androsporangium 27-32 by 12-32 »; dwarf male stipe 16-22 by 52-73 u; antheridium 9-13 by 11-22 4. TypE Locatiry: Woods Hole, Massachusetts. D1STRIBUTION: Massachusetts. 1596. Oedogonium concatenatum var. regulare Taft, Bull. Torrey Club. 62: 284. 1935. Oogonium single, subovoid to quadrangularly ellipsoid; oospore of the same form as the oogonium; median spore-wall with concentrically arranged pits; vegetative cell 23-26 by 89-142 x; suffultory cell 53-59 by 105 »; oogonium 66-69 by 99-106 u; oospore 63-68 by 83-86 u; androsporangium 32 by 32 »; dwarf male stipe 16-20 by 57-70 uw; antheridium 12-15 by 8-164. Typ Loca.ity: Okla- homa. Dr1stRrBuTion: Oklahoma. Pate 35. f. 540. 159¢c. Oedogonium concatenatum var. Hutchinsiae (Wittr.) Tiffany, n. var. Oedogonium Hutchinsiae Wittr. Nova Acta Soc. Sci. Upsal. IIT. 93: 42. 1874. Oedogonium concatenatum f. Hutchinsiae Hirn, Acta Soc. Sci. Fenn. 27: 225. 1900. A little smaller; oospore more nearly globose, the pits of the middle layer of the spore-wall not arranged in evident longitudinal series; vegetative cell 26-35 by 75-210 yu; suffultory cell 37-50 by 65-200 »; oogonium 52-75 by 67-95 p; oospore 50-73 by 55-77 ». Type Locaiity: Ireland. Distripurion: Iowa. Puiate 35. f. 539. 160. Oedogonium silvaticum Hallas, Bot. Tidssk. 26: 404. 1905. Dioecious, nannandrous, gynandrosporous; oogonium 1, ellipsoid-globose, pore superior; oospore globose, not filling oogonium, its wall smooth; suffultory cell subtumid; dwarf male suberect, on suffultory cell, antheridium exterior; vegetative cell 12-15 by 65-120 u; suffultory cell 20 by 60 4; oogonium 37 by 50 u; oospore 28 by 28 uv; androsporangium 7 by 17 4; dwarf male stipe 11 by 39 uw; antheridium 7 by 7 u. TYPE LocaLity: Denmark. DISTRIBUTION: Florida. PLATE 33. f. 518 161. Oedogonium Borisianum (Le Clerc) Wittr. Nova Acta Soc. Sci. Upsal. III. 93: 25. 1874. Prolifera Borisiana Le Clerc, Mém. Mus. 3: 475. 1817. Vesiculifera aurea Hassall, Ann. Mag. Nat. Hist. 10: 392. 1843. Vesiculifera Borissti Hassall, Hist. Brit. Fresh-w. Algae 1: 201. 1845. Ocedogonium apophysatum A. Br.; Kiitz. Sp. Alg. 366. 1849. Part 1, 1937] OEDOGONIACEAE 65 Ocedogonium setigerum Vaupell, Ann. Sci. Nat. IV. 11: 192. 1859. ? Androgynia mirabilis H. C. Wood, Fresh-w. Algae N. Am. 196. 1873. Ocedogonium birmanicum Wittr. Nova Acta Soc. Sci. Upsal. TIT. 93:24. 1874, Dioecious, nannandrous, gynandrosporous or idioandrosporous; oogonia 1—5, obovoid or quadrangular-ellipsoid, pore superior; oospore ovoid to obovoid (often quadrangular-ovoid), not filling oogonium; spore-wall smooth; androsporangia 1~7, usually in the upper part of the filament; basal cell elongate; terminal cell, often an oogonium, broadly apiculate, obtuse, or sometimes setiferous; suffultory cell swollen; dwarf male somewhat curved, on suffultory cell; antheridia 2; vegetative cell sometimes capitellate, 15-23 by 45-140 yu; suffultory cell 31-38 by 50-92 u; oogonium (33)40-50 by 55-90 u; oospore 35-46 by 48-60 uw; androsporangium 16-19 by 15-23 »; dwarf male stipe 12-18 by 35-47 #; antheridium 7~10 by 11-16 x. Type LocaLitry: Europe. DISTRIBUTION: Massachusetts, Pennsylvania, Michigan, Indiana, Illinois, Iowa, Florida, Alabama, Oklahoma, Utah, California; Puerto Rico; British Columbia. PLATE 33. f. 527. 161¢. Oedogonium Borisianum var. minus Tiff. & Smith; B. H. Smith, Proc. Ind. Acad. 41: 190, 1932. Vegetative cell 14-15 by 37-48 y; suffultory cell 30 by 52 »; oogonium 33-55 by 33-55 yp; oospore 30-33 by 37-42 ». Tyre Locauity: Indiana. DisTripution: Indiana. 162. Oedogonium Westii Tiff. & Br.; Tiff. Ohio Jour. Sci. 34: 325. 1934. Oedogonium Borisianum W. & G. West, Jour. Bot. 41:36. 1903. Not O. Borisianum Wittr. 1874. Oedogonium Borisianum var. Westii Tiff. & Br.; Tiff. Ohio Jour. Sci. 29:74. 1929: Love & Rogers, Proc. Ind. Acad. 42: 80. 1933. Dioecious, nannandrous, gynandrosporous (?); oogonia 1-3, obovoid, pore superior; oospore ovoid to obovoid, not filling oogonium, its wall smooth; suffultory cell enlarged; dwarf male curved, on suffultory cell; antheridium 1; vegetative cell 17-35 by 81-180 y; suffultory cell 31-48 by 105-168 u; oogonium 53-68 by 67-99 4; oospore 49-65 by 49-81 u ; antheridium 17-20 by 12-13 pz. TYPE LOCALITY: England. DISTRIBUTION: Michigan, Indiana, Mississippi. PLATE 33. f. 528. 163. Oedogonium multisporum H. C. Wood, Proc. Am. Phil. Soe. 11: 141. 1869. Androgynia mulltispora H. C. Wood, Fresh-w. Algae N. Am. 196. 1873. Dioecious, nannandrous; oogonia 1-3, subovoid or subglobose, pore superior; oospore globose, nearly filling oogonium; spore-wall smooth; dwarf male a little curved or nearly erect, near or on oogonium, antheridia exterior, 1-4; vegetative cell 10-15 by 10-30 u; oogonium 24-35 by 27-33 u; oospore 27-30 by 24~30 u; dwarf male stipe 10-11 by 26-30 uw; antheridium 7-9 by 7-9 p. TYPE LOCALITY: Philadelphia, Pennsylvania. DISTRIBUTION: Pennsylvania, Michigan, Indiana, Illinois, Kentucky, Oklahoma. Pirate 33. f. 519, 520. 164. Oedogonium irregulare Wittr. Oefv. Sv. Vet.-Akad. Forh. 27: 128. 1870. Dioecious, nannandrous; oogonium 1, globose or rarely subdepressed-globose, pore supe- rior; oospore globose, completely filling oogonium; spore-wall smooth; dwarf male erect, on or near oogonium, antheridia exterior, 1-4; vegetative cell 15-20 by 40-80 4; oogonium 37-45 by 36-47 »; oospore 36-42 by 34-41 »; dwarf male stipe 12-15 by 20-24 yw; antheridium 10-12 by 68 yw. TYPE LocaALITy: Sweden. . . DIsTrRiBuTION: Ohio, Michigan, Illinois, Florida, Oklahoma; British Columbia. Pirate 33. f. 521. 66 NORTH AMERICAN FLORA [VoLuME 11 164a. Oedogonium irregulare var. condensatum (Hallas) Hirn, Acta Soc. Sci. Fenn. 34°: 17. 1906. Oedogonium condensatum Hallas, Bot. Tidssk. 26: 400. 1905. Idioandrosporous; oogonia rarely in two’s; oospore depressed-globose; androsporangia 1-13; vegetative cell 14-18 by 20-80 u; oogonium 35-46 by 28-38 »; oospore 32-44 by 25-36 u; androsporangium 12-14 by 7-21 yu; dwarf male stipe 11-13 by 21-24 w; antheridium 9-10 by 7-12 u. Type Locaiiry: Denmark. DisTRisvu- TION: Michigan, Oklahoma. PLaTE 33. f. 522. 165. Oedogonium victoriense G. West; A. D. Hardy, Vict. Nat. 23:22. 1906. Dioecious, nannandrous, gynandrosporous; oogonium 1, ellipsoid-globose to ellipsoid- doliiform, pore superior; oospore exactly globose, not filling oogonium; spore-wall smooth; androsporangium 5—6-celled; dwarf male on suffultory cell, stipe curved, antheridia 2; suffultory cell broadly dilated; vegetative cell 25-29 by 50-87 u; oogonium 49 by 57 u; oospore 39 by 39 y; androsporangium 25-26 by 4-8 uw; antheridium 7-8 by 4-5 zu. Typ LOCALITY: Victoria, Australia. DISTRIBUTION: Iowa. PLATE 34. f. 535, 166. Oedogonium crassiusculum Wittr. Oefv. Sv. Vet.-Akad. Forh. 27: 132. 1870. Dioecious, nannandrous, gynandrosporous; oogonia | or 2, globose-obovoid or subglobose, pore superior; oospore ellipsoid-globose or globose, spore-wall smooth and thick, quite filling oogonium; androsporangia 2-5; dwarf male suberect, on or near suffultory cell, antheridium exterior, 1-?; vegetative cell 27-30 by 95-105 u; oogonium 54-60 by 60-75 py; oospore 51-57 by 52-63 »; androsporangium 26-28 by 10-18 »; dwarf male 13 by 60»; antheridium 7-9 by 9-16 gp. TYPE LOCALITY: Sweden. DISTRIBUTION: Massachusetts, Connecticut, Ohio, Michigan, Iowa, Mississippi, Oklahoma. PuLate 34. f. 532. 166a. Oedogonium crassiusculum var. Arechavaletae (Wittr.) Hirn, Acta Soc. Sci. Fenn. 27: 216. 1900. O¢edogonium Arechavaletae Wittr.; Wittr. & Nordst. Algae Exsicc. 706. 1886; Bot. Notiser 1886: 133. 1886. Idioandrosporous; vegetative cell 21-35 by 32-110 »; oogonium 39-54 by 42-65 »; oospore 37-52 by 40-57 u; dwarf male 14-16 by 40-57 yu; antheridium 9-14 by 10-16 z. TYPE LOCALITY: Uruguay. DistRrBurion: Indiana, Kentucky, Oklahoma. Prats 34. f. 533. 166). Oedogonium crassiusculum var. cataractum (Wolle) Tiff. Oedog. Monog. 130. 1930. Oedogonium cataractum Wolle, Fresh-w. Algae U.S. 77. 1887. Idioandrosporous; oogonia 1 or 2, often terminal, obovoid-globose or subglobose or broadly ovoid, pore superior; oospore globose or obovoid-globose, nearly filling oogonium; androsporangia 1-6; dwarf male curved, on suffultory cell or below; vegetative cell 28-38 by 42-112 »; oogonium 55-60 by 60-75 yu; oospore 50-55 by 50-60 u; androsporangitum 26-30 by 10-15 »; dwarf male 10 by 65 4. ‘YPE LocaLITY: Pike County, Penn- sylvania. DiIsrrIsuTIon: Pennsylvania, Ohio, Indiana, Iowa, Oklahoma. Prats 34. f. 534. 167. Oedogonium idioandrosporum (Nordst. & Wittr.) Tiff. Ohio Jour. Sci. 34: 325. 1934. Oedogonium crassiusculum var. idioandrosporum Nordst. & Wittr.; Wittr. & Nordst. Algae Exsicc. 208. 1879; Bot. Notiser 1879: 23. 1879. Oedogonium crassiusculum C.H.S. Phyc. Bor. Am. 72. 1895. Not O. crassiusculum Wittr. 1870. Ocedogonium crassipellitum G. West, Jour. Bot. 37:55. 1899. Dioecious, nannandrous, idioandrosporous; oogonia 1-3, globose-obovoid to globose, pore superior; oospore ellipsoid-globose, ovoid, angular-globose (rarely globose), nearly filling the oogonium ; spore-wall smooth, thick; androsporangia 1-4; dwarf male straight or slightly curved, on or near the suffultory cell; antheridia exterior, 1 or 2; vegetative cell 25-36 by 65-200 u; oogonium 48~59 by 57-90 »; oospore 42-57 by 50-66 uw; androsporangium 30-34 by 12-21 4; dwarf male stipe 14-16 by 60-70 u; antheridium 8-10 by 10-18 p. TYPE LOCALITY: Europe. Distripurion: Maine, Massachusetts, Connecticut, New York, New Jersey, Pennsylvania, Ohio, Michigan, Illinois, lowa, Minnesota, South Dakota, Mississippi. Prats 33. f. 523, 524. 167¢. Oedogonium idioandrosporum var. minus Tiff. ‘Trans. Am. Micr. Soc. 53: 4. 1936. Ocedogonium crassiusculum var. idioandrosporum Jao, Rhodora 36: 201. 1934. Not O. crassiusculum Part 1, 1937] OEDOGONIACEAE 67 var. idioandrosporum Nordst. & Wittr. 1879. Oogonia 1-4; oospore sometimes angular-globose with very thick wall; smaller in all dimensions; vegetative cell 19-32 by 60-103 u; oogonium 42-54 by 45-60 n; oospore 38-52 by 41-52 »; androsporangium 20-26 by 8-26 u; dwarf male stipe 9-15 by 43-56 4; antheridium 8-10 by 8-20 »; otherwise as in the species. TYPE LOCALITY: Woods Hole Massachusetts. DISTRIBUTION: Massachusetts, Alabama. Puats 33. f. 525, 526. , 168. Oedogonium contortum Hallas, Bot. Tidssk. 26: 399. 1905. Dioecious, nannandrous, gynandrosporous; oogonium 1 (rarely 2), depressed-globose (rarely pyriform), operculate, division inframedian; oospore depressed (rarely globose), quite filling oogonium; spore-wall smooth; androsporangia 1-5, curved, hypogynous or rarely epigynous or scattered; dwarf male obovoid, unicellular, on oogonium; vegetative cell 5—7 by 20-60 2; oogonium 23-35 by 16-35 u; oospore 16-28 by 12-21 u; androsporangium 5-7 by 7-14 p; dwarf male 4 by 13 p. TYPE LocaALITy: Denmark. DISTRIBUTION: Florida. PLATE 27. f. 420. 169. Oedogonium longicolle Nordst. Minneskr. Fys. Sallsk. Lund 7: 20. 1878. Dioecious, nannandrous; oogonia 1~7, pyriform, often elongate longitudinally, operculate, division median and narrow; oospore subdepressed-globose or subglobose, inflating oogonium medianly, not filling it longitudinally; spore-wall smooth; basal cell subhemispheric; dwarf male unicellular, obovoid, minute, on oogonium; vegetative cell 4-6 by 16-45 »; oogonium 13-16 by 16-32 u; oospore 12-15 by 10-16 u; dwarf male 2 by 4 4; basal cell 14 by 6p. TYPE LOCALITY: Hawaii. DISTRIBUTION: North Carolina, Florida. PuaTe 24. f. 388, 389. 170. Oedogonium senegalense (Nordst.) Tiff. Ohio Jour. Sci. 34: 326. 1934. Oedogonium longicolle var. senegalense Nordst. Acta Univ. Lund 164: 13. 1880. Oedogonium longicolle var. senegalense f. afghanicum Schaars. Jour. Linn. Soc. 21: 249. 1884, ? Oedogonium delicatulum Kiitz.; Wolle, Fresh-w. Algae U.S. 93. 1887. Dioecious, nannandrous; oogonia 1-5, pyriform, often elongate lengthwise, operculate, division median (rarely supramedian) and narrow; oospore subglobose to depressed-globose, sometimes inflating oogonium medianly but not filling it longitudinally, its wall smooth; basal cell subhemispheric; dwarf male unicellular, obovoid, minute, on oogonium, often lacking; vegetative cell 5-8 by 12-40 u; oogonium 16-21 by 14-32 »; oospore 14-20 by 11-19 pn; dwarf male 1-2 by 2-3 y; basal cell 13-14 by 5-7 yz. TypE Locatity: Africa. DISTRIBUTION: North Carolina, Oklahoma. PLATE 24, f. 381, 382. 171. Oedogonium Rothii Pringsh. Jahrb. Wiss. Bot. 1:69. 1857. ? Prolifera Rothii Le Clerc, Mém. Mus. Paris 3: 476. 1817. . Oedogonium cryptoporum var. subdepressum Wittr.; Wittr. & Nordst. Algae Exsice. 507. 1883; Bot. Notiser 1883: 148. 1883. Oedogonium cryptoporum var. vulgare f. abbreviatum Gutw. Nuova Notar. 8: 126. 1897. Dioecious, nannandrous, gynandrosporous; oogonia 1-3, sttbdepressed-globose, operculate, division median, narrow; oospore depressed-globose, almost filling cogonium; spore-wall smooth; androsporangia 1-4, subhypogynous, hypogynous, subepigynous, or scattered; vege- tative cell 6-10 by 20-76 «; oogonium 20-27 by 16-27 wu; oospore 17-25 by 14-20»; andro- sporangium 6-8 by 5-10 4; dwarf male 4 by 11-12 p. TYPE LocaLity: Germany. DISTRIBUTION: Massachusetts, Florida, Oklahoma. PLATE 24. f. 380. 68 NORTH AMERICAN FLORA [VoLuME 11 172. Oedogonium decipiens Wittr. Oefv. Sv. Vet.-Akad. Férh. 27: 126. 1870; Hirn, Acta Soc. Sci. Fenn. 27: 266. 1900. Oedogonium vesicaium De Bary, Ber. Verh. Nat. Ges. Freiburg 1: 224, 1856. Oedogonium Rothii f. majus W. & G. West, Jour. Bot. 35:5. 1897. Dioecious, nannandrous, gynandrosporous; oogonia 1-3, subdepressed-globose, operculate, division median, rather narrow; oospore subdepressed or depressed-globose, almost filling the oogonium; spore-wall smooth; suffultory cell not swollen; androsporangia 1-6, subepigynous, hypogynous, or scattered; dwarf male unicellular, usually on the oogonium; vegetative cell 9-12 by 28-80 4; oogonium 30-38 by 27-40 u; oospore 25-34 by 23-28 yu; androsporangium 9-10 by 8-15 w; dwarf male 6-7 by 13-15 pu. TYPE LocaLity: Germany. DISTRIBUTION: New Jersey, Michigan, Indiana, Iowa, Florida; Puerto Rico. PLATE 24. f. 383. 172a, Oedogonium decipiens var. dissimile (Hirn) Tiffany, var. nov. Oedogonium decipiens f. dissimile Hirn, Acta Soc. Sci. Fenn. 27: 267. 1900. Gynandrosporous; vegetative cells evidently capitellate, 8-14 by 20-65 »; oogonium 28-35 by 23-38 u; oospore 23-34 by 21-30 »; androsporangium 8-9 by 6-10 u; dwarf male 5-6 by 11-14 4. Type Loca.ity: Brazil. DISTRIBUTION: Michigan, Taans: Illinois; Puerto Rico. PLatE 24. f. 384, 385. 1726. Oedogonium decipiens var. africanum Tiff. Ohio Jour. Sci. 29: 74. 1929. Smaller and idioandrosporous; vegetative cell 8-13 by 25-60 »; oogonium 25-32 by 24-32 u; oospore 24-30 by 23-28 nu; androsporangium 7-11 by 9-13 »; dwarf male 6-7 by 9-12 xu. TYPE LOCALITY: Africa. DISTRIBUTION: Indiana. PLaTE 24. f. 386. 173. Oedogonium macrospermum W. & G. West, Jour. Roy. Micr. Soc. 1897: 472. 1897; Tiff. Trans. Am. Micr. Soc. 45: 105. 1926, Oedogonium macrospermum f. patagonicum Borge & Hirn; Borge, Bih. Sv. Vet.-Akad. Handl. 271°: 9, 1901. Dioecious, nannandrous, gynandrosporous; oogonium 1 (rarely 2), subdepressed to depressed-globose, operculate, division median, narrow; oospore subdepressed-globose, filling the oogonium; spore-wall smooth; dwarf male slightly curved or straight, not infrequently at right angles to the filament, on suffultory cell or on cogonium or scattered; antheridia exte- rior, 1-4; basal cell elongate; androsporangium 1—?; vegetative cell 10-16 by 30-80 yu; oogonium 39-46 by 34-44 un; oospore 36—44 by 32-42 uw; dwarf male stipe 9-14 by 16-30 uw; androsporan- gium 14-15 by 10-11 yw; antheridium 7-10 by 6-16 u. TyPé LOCALITy: England. DIstrIBUTION: Ohio, Michigan, Iowa. PLATE 24. f. 391, 392. 174, Oedogonium costatum Transeau; Tiff. Oedog. Mon. 146. 1930. Dioecious, nannandrous, gynandrosporous; oogonium 1, depressed globose, with verticil- late folds forming distinct pointed projections at the suture, operculate, division narrow, supra- median; oospore depressed-globose, filling oogonium; spore-wall smooth; androsporangium hypogynous; vegetative cell usually capitellate; terminal cell with rounded apex; vegetative cell 12-15 by 50-70 yw; oogonium 50-55 by 40-44 y; oospore 48-53 by 36-42 u; androsporangium 12-13 by 10-12 z. TYPE LOCALITY: Smithtown Pond, Long Island, New York. DISTRIBUTION: New York, Florida. PLATE 27. f. 433. 175. Oedogonium rugulosum Nordst. Oefv. Sv. Vet.-Akad. Forh. 344: 28. 1877. Dioecious, nannandrous, gynandrosporous; oogonia 1 or 2, obovoid or obovoid-ellipsoid, operculate, division superior; oospore ellipsoid, nearly filling oogonium (or rarely globose- ellipsoid, not filling oogonium); spore-wall smooth; dwarf male on or near oogonium; andro- Part 'l, 1937] OEDOGONIACEAE 69 sporangium usually 1, hypogynous; antheridium exterior, 1-?, curved; terminal cell apically obtuse; vegetative cell 4-8 by 10-35 »; oogonium 16~20 by 22~29 4; oospore 15-18 by 19-25 ; androsporangium 6-8 by 10-11 4; antheridium 4-5 by 5-6 »; dwarf male 5~7 by 11-14 p. TYPE LOCALITY: Europe. DISTRIBUTION: Massachusetts, New York, Michigan, Indi Illinois, I i ississippi Puan ne ee g jana, Illinois, Iowa, Florida, Mississippi. _175a. Oedogonium rugulosum var. rotundatum (Hirn) Tiff. Brittonia 2: 169. 1936. Oedo- gonium rugulosum {. rotundatum Hirn, Acta Soc. Sci. Fenn. 27: 242. 1900. Oogonium single or 2-seriate; oospore giobose-ellipsoid or ellipsoid; vegetative cell 5-8 by 15-31 uw; basal cell 7-8 by a fags rare ae by rae eg : : oospore Pe by 18-65 »; dwarf male 5-8 by 11-15 y»; antheri- ium y #; otherwise like the species. Type LocaLiry: Germany. : Bice, Pua 24 1 8 a7 p G ny. DISTRIBUTION: Puerto . - Oedogonium rugulosum var. minutum (Hansg.) Tiffany. Oedogonium crispulum var. minutum Hansg. Arch. Nat. Land. Béhmen 5%: 44, 1886. Oedogonium eee if minutum Hirn, Acta Soc. Sci. Fenn. 27: 242. 1900. Oedogonium longatum Skuja, Acta Horti Univ. Latv. 7: 59. 1932. Not O. longatum Kitz. 1853. Smaller; median spore-wall distinctly crenulate; vegeta- tive cell 3-7 by 12-40 u; oogonium 13-18 by 18-24 yu; oospore 12-17 by 15-20 u; dwarf male 4-6 by 13- 16 y; antheridium 5-6 by 6-94. Type LocaLity: Austria. DisrrIBUTION: Illinois, Oklahoma. PLATE 24. f. 378. 176. Oedogonium Schmidlei Gutw. Rozp. Akad. Umiej. IT. 13:34. 1898. Dioecious, nannandrous; oogonium 1, obovoid-globose, operculate, division superior (narrow?); oospore globose, not filling oogonium; spore-wall pitted, rather thick; dwarf male a little curved, on suffultory-cell, antheridium exterior, 1?; vegetative cell 10 by 25-90 y; sufful- tory cell 22 by 44 4; oogonium 29 by 32-37 u; oospore 26 by 26 »; dwarf male stipe 5 by 27 n; antheridium 5-6 by 5-6 u. TYPE LOCALITY: Austria. DISTRIBUTION: British Columbia. PLATE 24. f. 390. 177. Oedogonium Croasdaleae Jao, Rhodora 36: 202. 1934. Dioecious, nannandrous, gynandrosporous; oogonia 1-7, generally on the upper portion of the filament, quadrangular-ellipsoid, subovoid, or subellipsoid, operculate, division superior, sometimes wide; oospore of the same form as the oogonium and filling it, rarely not reaching the lower end; spore-membrane of three layers, the outer smooth, the median thick and lamellose, with 16-30 anastomosing, irregularly undulate, longitudinal ribs, the inner granulate; suffultory cell tumid; androsporangia to 8-seriate, epigynous, rarely hypogynous or subhypogynous; dwarf male goblet-shaped, curved, on the suffultory cell, occasionally on the oogonium, anther- idium 1, interior; filaments tapering toward the base; terminal cell obtuse, often an oogonium or androsporangium; vegetative cell 20-30 by 95-230 yw; oogonium 56-77 by 88-116 u; oospore 54-73 by 77-105 uw; suffultory cell 39-72 by 70-147 nu; androsporangium 10-55 by 7-77 4; dwarf male 10-15 by 55-63 pu. TYPE LOCALITY: Woods Hole, Massachusetts. DISTRIBUTION: Massachusetts. Prats 26. f. 416-419. 178. Oedogonium monile Berk. & Harv.; Harv. in Hook. f. Fl. Tasm. 2: 342. 1859; Wittr. Nova Acta Soc. Sci. Upsal. III. 93:40. 1874. Dioecious, nannandrous; oogonia 1-8, subovoid or subglobose, operculate, division supe- rior, very broad; oospore globose or subglobose, quite filling oogonium (except in length); spore-wall of three layers, the outer smooth, the middle scrobiculate, the inner smooth; vege- tative cell sometimes capitellate; basal cell elongate; terminal cell obtuse; dwarf male a little curved, near oogonium; antheridium exterior, 1—?; vegetative cell 9-15 by 50-160 u,; sufiultory cell 21-29 by 40-57 4; oogonium 30-39 by 30-56 1; oospore 28-38 by 28-38 4; dwarf male stipe 9 by 25 w; antheridium 7 by. 7 u. 70 NORTH AMERICAN FLORA [VoLuME 11 TYPE LOCALITY: Victoria, Australia. ; DISTRIBUTION: Massachusetts, Michigan, Indiana; Puerto Rico. PLATE 25. f. 393, 394. 179. Oedogonium Ackleyae Tiffany, sp. nov. Oedogonium macrandrium var. scrobiculatum Ackley, Trans. Am. Micr. Soc. 48: 305. 1929. Dioecious, nannandrous, idioandrosporous (?); oogonia 1-3, globose to subglobose, with superior operculum; oospore globose, not quite filling oogonium, its middle wall scrobiculate; dwarf male on or near oogonium, or sometimes scattered, stipe I-celled; antheridia 1-6; vegetative cell 9-11 by 27-604; oogonium 32-35 by 30-35 4; oospore 31-33 by 31-32 y; dwarf male stipe 12 by 10-18 4; antheridium 8-9 by 6-10 u. TYPE Locality: Holland, Michigan. DISTRIBUTION: Michigan. PLATE 24. f. 387. 180. Oedogonium longatum Kiitz. Tab. Phyc. 3:11. 1853. Dioecious, nannandrous; oogonia 1-3, ovoid to ellipsoid, operculate, division superior; oospore ellipsoid, about filling the oogonium; spore-wall usually smooth, basal cell elongate; terminal cell obtuse; dwarf male on the oogonium; antheridium exterior, 1—?, curved; vegeta- tive cell 4-7 by 10-35 yu; oogonium 16-18 by 21-25 uw; oospore 15-17 by 17-20 4; dwarf male stipe 5-6 by 10-15 yp; antheridium 4-5 by 5-6 uz. TPE LOcALIry: Germany. DisTRIBUTION: Massachusetts, Pennsylvania, Michigan, Iowa; British Columbia. PLATE 24. f. 379. 181. Oedogonium hians Nordst. & Hirn; Hirn, Acta Soc. Sci. Fenn. 27: 227. 1900. Dioecious, nannandrous, gynandrosporous; oogonia | or 2, subovoid or globose, operculate, division superior, wide; oospore globose, quite filling oogonium; spore-wall smooth, thick, and often lamellose; suffultory cell tumid; androsporangia 1 or 2, subepigynous; basal cell elongate; terminal cell apically obtuse; dwarf male curved, on suffultory cell, antheridium exterior, uni- cellular; vegetative cell 9-15 by 37-145 yu; suffultory cell 26-33 by 40-80 uw; oogonium 37-43 by 45-60 u; oospore 33-40 by 33-40 »; androsporangium 11-12 by 15-18 uw; dwarf male stipe 7-9 by 32-35 wu; antheridium 6-8 by 5-6 yu. TYPE LOCALITY: Brazil. DISTRIBUTION: Iowa. PLATE 28. f. 449, 450. 182. Oedogonium laetevirens Wittr.; G. Zeller, Vidensk. Meddel. 1876: 427. 1877. Dioecious, nannandrous; oogonia 1-3, subobovoid-globose, operculate, division superior; oospore globose or subdepressed-globose, filling oogonium or enlarging it; spore-wall smooth; dwarf male on oogonium, stipe a little curved, antheridium exterior, 1-?; vegetative cell 12-14 by 12-32 u; oogonium 28-34 by 30-36 yw; oospore 23-32 by 23-29 u; dwarf male stipe 7-10 by 17—21 w«; antheridium 6~8 by 5-7 yu. TYPE Locality: Brazil. DISTRIBUTION: Puerto Rico. PLATE 25. f. 403. 183. Oedogonium macrandrium Wittr. Oefv. Sv. Vet.-Akad. Foérh. 27: 130. 1870. Dioecious, nannandrous; oogonia 1-4, globose-ovoid, operculate, division superior; oospore globose, rarely ovoid-globose, not completely filling the oogonium; spore-wall smooth; Part 1, 1937] OEDOGONIACEAE 71 terminal cell obtuse or very shortly apiculate: dwarf male on or near the oogonium, stipe much curved, sometimes 2-3 celled; antheridia 1-7; vegetative cell 15-20 by 45-100 uw; cogonium 36-42 by 43-54 u; oospore 31-37 by 33-39 u; dwarf male stipe 12-13 by 24-33 uw: antheridium 9-10 by 7-10 yw. ‘TYPE LOCALITY: Europe. DISTRIBUTION: Massachusetts, Pennsylvania, Ohio, Michigan, Iowa, North Carolina; Puerto co. PLATE 25. f. 396. 183¢. Oedogonium macrandrium var. aemulans Hirn, Acta Soc. Sci. Fenn 27: 235 ? Oedogonium lundense Wolle, Fresh-w. Algae U. S. 79. 1887. Not O. lundense Wittr. i872, Oedogonium macrandrium f. aemulans Hirn, Acta Soc. Sci. Fenn. 343: 43. 1906. Vegetative cell 10-16 by 22-90 »; oogonia in groups of 2-9, 28-42 by 33-45 u; oospore 26-36 by 26-36 yu; dwarf male stipe 9-12 by 20-25 KS antheridium 6-9 by 7-104. ‘TypHx Locaurry: Brazil. DIsTRIRUTION: Pennsylvania, Michigan, Illinois, Mississippi, Oklahoma California. PLats 25. f. 397. , 183d. Oedogonium macrandrium f. lundense (Wittr.) Hirn, Acta Soc. Sci. Fenn. 343:42, 1906. Ocdogonium lundense Wittr. Bot. Notiser 1872: 4. 1872. Oogonium subobovoid-globose; oospore- wall sometimes thick; vegetative cell 13-21 by 13-50 u; oogonium 31-40(45) by 34-43 us oospore 29-36 (40) by 29-36(40) »; dwarf male stipe 10-15 by (21)24-32 u; antheridium 8-10 by 6-9 7 Type LOCALITY: Sweden. DisTRipution: Florida. Prats 25. f. 402. 183c. Oedogonium macrandrium var. propinquum (Wittr.) Hirn, Acta Soc. Sci. Fenn. 343: 42. 1906. O4dogonium propinquum Wittr. Oetv. Sv. Vet.-Akad. Férh. 27: 129. 1870. Oedogonium eremitum Hallas, Bot. Tidssk. 26: 403. 1905. Smaller; oogonia 1-3; vegetative cell 8-14 by 18- 70 2; oogonium 28-36 by 28-45 n; oospore 24-31 by 24-31 4; dwarf male stipe 11-14 by 20-35 BS antheridium 7-9 (12) by 6-8». TypE LocaLity: Sweden. DistriBuTion: Massachusetts, Ohio, Michigan, Indiana, Illinois, North Carolina, Alabama, Oklahoma; Puerto Rico. Piate 25. f. 401. 183d. Oedogonium macrandrium var. Hohenackerii (Wittr.) Tiff. Ohio Jour. Sci. 29:75. 1929. Ocedogonium Hohenackerit Wittr. Nova Acta Soc. Sci. Upsal. III. 93:23. 1874. Vegetative cell 12-15 by 24-45 y; oogonium single, 29-33 by 30-35 un; oospore 27-31 by 28-31 4; androsporangium 11-13 by 10-14 »; dwarf male stipe 9-14 by 18-24 uw; antheridium 5-6 by 5-8». ‘TyPE LocaLity: India. DIisTRIBUTION: Ohio, Michigan, North Carolina, Oklahoma. Prate 25. f. 398-400. Ri 184. Oedogonium ciliatum (Hassall) Pringsh. Ber. Akad. Berlin 1856: 227. 1856. Vesiculifera ciliata Hassall, Hist. Brit. Fresh-w. Algae 1: 202. 1845. Oedogonium piliferum Auersw.; Rab. Alg. Sachs. 474. 1855. Dioecious, nannandrotus, gynandrosporous; oogonia 1-7, ovoid, to ovid-ellipsoid (rarely nearly ellipsoid), operculate, division superior or nearly supreme; oospore ovoid to subellipsoid, rarely globose, nearly filling oogonium; spore-wall smooth; androsporangia to 8-seriate, often subepigynous; basal cell elongate; terminal cell setiform; dwarf male curved, on oogonium; antheridium exterior, 1; vegetative cell 14-24 by 35-92 yu: oogonium 43-50 by 55-72 y; oospore 40-47 by 44-57 »; androsporangium 14-20 by 10-20; dwarf male stipe 10-15 by 24-31 y; antheridium 8-10 by 10-11 pz. TYPE LOCALITY: Europe. DistTRIBUTION: Massachusetts, Ohio, Michigan, Indiana, Iowa; British Columbia. PLATE 25. f. 395. 185. Oedogonium pluviale Nordst.; Rab. Alg. Eur. 2257. 1871. ? Vesiculifera dissiliens Hassall, Hist. Brit. Fresh-w. Algae 1: 202. 1845. Oedogonium intermedium Rab. Alg. Sachs. 828. 1859. Not O. intermedium Kiitz. 1843. Oedogonium diplandrium Juranyi, Jahrb. Wiss. Bot.9: 27, 1873. Oedogonium Montagnei var. saxicola Wittr. Oefv. Sv. Vet.-Akad. Férh. 336: 50. 1876. Oedogonium fonticola Wolle, Fresh-w. Algae U.S.93. 1887. Not O. fonticola A. Br. 1849. Oedogonium Montagnei var. submarinum Wittr.; Wittr. & Nordst. Algae Exsicc. 905. 1889; Bot. Notiser 1889: 161. 1889. : 7 ? Oedogonium fonticola var. flavescens Hansg. Sitz.-ber. Béhm. Ges. Wiss. 1891: 305. 1891. Dioecious, nannandrous, idioandrosporous; oogonium 1 (very rarely 2-3), obovoid-globose or sttbglobose, operculate, division superior; oospore subglobose or subellipsoid-globose, almost filling oogonium; spore-wall smooth; vegetative cell varying much in the same plant; basal cell elongate; terminal cell obtuse; androsporangia to 10-seriate; dwarf male broadly obovoid, unicellular, on oogonium; vegetative cell 22-29 by 20-55 x; androsporangial vegetative cell 18-27 by 18-27 u; oogonium 34-45 by 34-50 yu; oospore 32-40 by 31-43 yn; androsporangium 17-25 by 6-13 w; dwarf male 10 by 14-15 u. Type Locality: Sweden. DistrisuTion: California. PuLaTE 23. f. 361, 362. 72 NORTH AMERICAN FLORA [VoLUME 11 186. Oedogonium spectabile Hirn, Acta Soc. Sci. Fenn. 27: 284. 1900. Dioecious, nannandrous, idioandrosporous; oogonium 1, obovoid-ellipsoid or obovoid, operculate, division superior; oospore ellipsoid, nearly filling oogonium; spore-wall smooth; androsporangia to 16-seriate, the androsporangial part of the filament often curved; basal cell elongate; dwarf male broadly obovoid, unicellular, on oogonium; vegetative cell 20-32 by 25-90 np; oogonium 42-50 by 63-72 u; oospore 40-48 by 55-62 uw; androsporangium 19-27 by 11-19 4; dwarf male 11-14 by 16-21 pz. TYPE LOcaALITy: Australia. DisTRIBUTION: Mississippi. PuatE 27. f. 421-423. 187. Oedogonium obtruncatum Wittr. Nova Acta Soc. Sci. Upsal. TIT. 93:41. 1874. Dioecious, nannandrous, gynandrosporous; oogonia 1-6, ellipsoid, or globose-ellipsoid, operculate, division supreme, operculum small and deciduous; oospore of same form as oogo- nium, nearly filling it; spore-wall smooth; vegetative cell evidently capitellate; basal cell elongate; terminal cell (often the oogonium) apically obtuse; dwarf male oblong-pyriform, curved, unicellular, on oogonium; vegetative cell 18-22 by 56-110 4; oogonium 45-55 by 56- 68 «; oospore 43-53 by 52-66 ux; androsporangium 20 by 24 «4; dwarf male stipe 17-20 by 36- 40 uw; antheridium 6-8 by 4-6 p. TYPE LOCALITY: India. DISTRIBUTION: Ohio, Illinois, Wyoming; Puerto Rico. PuateE 25. f. 408. 187a. Oedogonium obtruncatum var. ellipsoideum Wittr. Bot. Notiser 1878: 141. 1878. Oogonia | or 2, longer, ellipsoid, terminal; vegetative cell 17-23 by 54-110 »; oogonium 42-54 by 66-75 »; oospore 40-52 by 60-72 ». Type Locality: Venezuela. DisTRIBUTION: Florida; Puerto Rico. PLatE 25. f. 409. 188. Oedogonium acrosporum De Bary, Abh. Senck. Nat. Ges. 1:47. 1854. Oedogonium acrosporum {. connectens Wittr.; Wittr. & Nordst. Algae Exsicc. 40/1, in part; Bot. Notiser 1882:54. 1882; C.H.S. Phyc. Bor. Am.409. 1898; Hirn, Acta Soc. Sci. Fenn. 27: 245. 1900. Dioecious, nannandrous, gynandrosporous (or idioandrosporous); oogonium 1, terminal, ellipsoid, operculate, division supreme, operculum small and deciduous; wall of oogonium with longitudinal, sometimes anastomosing, ridges on the inner surface; oospore quite filling the oogonium; outer layer of spore-wall with 23-30 longitudinal ridges, closely fitting in between the ridges of the oogonium, the inner smooth; basal cell elongate; terminal cell obtuse; andro- sporangia 1-8, hypogynous or scattered; dwarf male curved, on the suffultory cell, stipe some- times 2-3 celled, upper cells long; antheridia exterior, 1 or 2; vegetative cell 12-21 by 40-125 yu; suffultory cell 16-25 by 26-76 »; oogonium 35-48 by 50-63 4; androsporangium 16-21 by 12-15 yw; upper cell of dwarf male stipe, 6-8 by 55-71 yu, the lower cell 9-12 by 30-38 y; anther- idium 6-8 by 9-15 gz. ‘TYPE LOCALITY: Europe. DisTRIBUTION: Massachusetts, New York, Ohio, Michigan, Illinois, Iowa, Florida, Wyoming; Puerto Rico; British Columbia. PLATE 26. f. 410. 188a. Oedogonium acrosporum var. boreale Wolle, Fresh-w. Algae U.S. 84. 1887. Oedogo- nium acrosporum {. boreale Hirn, Acta Soc. Sci. Fenn. 27: 245. 1900; Tiff. Oedog. Monog. 158. 1930. Filaments usually not more than 10-celled; vegetative cell 12-17 by 45-140 nu: suffultory cell 20-40 by 52-83 y; oogonium 36-45 by 57-67 «; oospore 32-40 by 45-62 »; dwarf male 12-16 by 34-40 4. Type Locatiry: Pennsylvania and New Jersey. DistRIBuTion: New Jersey, Pennsyl- vania, Ohio. PLavTE 26. f. 414. 1886. Oedogonium acrosporum var. bathmidosporum (Nordst.) Hirn, Acta Soc. Sci. Fenn. 27: 246. 1900. Oedogonium bathmidosporum Nordst. Bot. Notiser 1878: 179. 1878. Ocedogonium acrosporum C.H.S.Phyc. Bot. Am. /63. 1896. Not 0O.acrosporum De Bary. 1854. Smaller; ribs Part 1, 1937] OEDOGONIACEAE 73 fewer, 11-17, evidently crenulate; dwarf male stipe unicellular; vegetative cell 12-17 — ; aber oon Oe ay ae oogonium 30-40 by 40-59 x; dvaei male stipe Ol) by 30-34 x antheridium 8— y 9-13 p. YPE LOCALITY: Brazil. D. : e MichieH. Pine 06 6 4ir ISTRIBUTION: Massachusetts, New York, 188c. Oedogonium acrosporum var. floridense Wolle. Fresh-w. Algae U.S. 83. 1887. Plant usually less than 10-celled; smalier with elongate vegetative cell and more tumid suffultory cell: dwarf male stipe 2—3-celled; vegetative cell 7-8 by 36-85 u; oogonium 33-35 by 45~50 xu. TYPE LocaLity: Florida, Disrrisurion: Florida. PLate 26. f. 413. 188d. Oedogonium acrosporum var. majusculum Nordst. Minneskr. Fys. Sallsk. Lund 7: 21. 1878. Smaller; vegetative cell 14-21 by 50-165 u; suffultory cell 18-28 by 42-65 »; oogonium 44-56 by nee ‘ : Pia ase 40-52 by 50-654. Tyre LocaLity: Hawaii. DisTrrBuTion: Michigan. LA .f. . 189. Oedogonium tentoriale Nordst. & Hirn; Hirn, Acta Soc. Sci. Fenn. 27: 248. 1900. Dioecious, nannandrous; oogonium 1, terminal, broadly ellipsoid or obovoid-globose, division supreme, lid small, deciduous, oogonium-wall longitudinally ribbed on the inner surface, ribs often anastomosate; oospore quite filling oogonium; outer layer of the spore-wall with 40-45 longitudinal, very finely crenulate ribs, closely filling in between the ribs of the oogonium, connected by delicate transverse lines, inner layer smooth; basal cell elongate; terminal cell obtuse; dwarf male suberect, on suffultory cell, antheridium exterior, 1—?; vegeta- tive cell 20-33(37) by 60-225 u; oogonium 66-82 by 73-88; oospore 64-80 by 70-83 yu; dwarf male stipe 10-15 by 37-48 y; antheridium 9-12 by 7 p. Type Locauity: Brazil. DIsTRiBUTION: Illinois, Florida. PuLaTE 26. f. 415. 190. Oedogonium Reinschii Roy; Cooke, Brit. Fresh-w. Algae 160. 1883; Tiff. Rev. Alg. 8:419. 1936. Cymatonema sp. Reinsch, Contr. Alg. Fung. 1: xi. 1875. Oedogonium sterile Hansg. Arch. Nat. Land. Béhmen 68: 260. 1888. Monoecious; oogonia 1 or 2, globose or depressed-globose or ovoid, rarely terminal, with wide median operculum; oospore similar in shape to oogonium, filling it or not, its wall smooth; antheridium single, subepigynous or subhypogynous; sperms 2, division vertical; vegetative cell often subhexagonal or subellipsoid, sometimes cylindric or subcylindric; basal cell sub- hemispheric; terminal cell apically obtuse; vegetative cell 5-11 by 9-24 p; oogonium 17-20 by 15-21 w; oospore 13-18 by 14-17 4; antheridium 4-5 by 4-5 »;.basal cell 8-16 by 5-10 u. Type LOCALITY: Scotland. DISTRIBUTION: Massachusetts, New York, Michigan, Iowa, Virginia, North Carolina, Florida; British Columbia. Puate 19. f. 275. 191. Oedogonium undulatum (Bréb.) A. Br.; De Bary, Abh. Senck. Nat. Ges. 1:94. 1854; Hirn, Acta Soc. Sci. Fenn. 27: 257. 1900. Cymatonema confervaceum Kitz. Sp. Alg.375. 1849. Conferva undulata Bréb.; Kiitz. Sp. Alg. 375, as synonym. 1849. Oedogonium undulatum var. Moebiusii Schmidle, Flora 82: 297. 1896. . Oedogonium undulatum var. interrupte-incisum Schroder, Forsch. Biol. Sta. Plon 5:38. 1897. Dioecious, nannandrous, gynandrosporous or idioandrosporous; oogonia 1 or 2, subglobose or ellipsoid-globose, operculate, division inferior, wide; oospore globose or subglobose, quite filling oogonium, spore-wa!l smooth, sometimes thick; androsporangia to 7-seriate; vegetative cell undulate (4 undulate constrictions); basal cell elongate, not undulate; terminal cell (some- times oogonium) apically obtuse; dwarf male elongate-obconic, usually on suffultory cell, rarely-‘on other vegetative cell near oogonium, antheridium interior; vegetative cell 15-22 by 45-110 p; oogonium 48-56 by 50-75 pu; oospore 42-50 by 42-52(60) 4; androsporangium 15-21 by 7-14 w; dwarf male 8-10 by 48-65(70) z. 74 NORTH AMERICAN FLORA [VoLuME 11 TYPE Locality: Europe. DistrRiBuTION: Michigan, Indiana, Iowa, Florida, Wyoming. PLATE 24. f. 373. 191a. Oedogonium undulatum f. senegalense (Nordst.) Hirn, Acta Soc. Sci. Fenn. 27: 261. 1900. Oc¢dogonium undulaium var. senegalense Nordst. Acta Univ. Lund 164: 13. 1880. Oogonium and oospore smaller than the type; dwarf male shorter; oogonia to 5-seriate; vegetative cell with 3 median swellings, repand, the terminal swelling entire, 15-22 by 45-110 u; oogonium 42-52 by 44 63 »; oospore 37-44 by 36-44 uw; androsporangium 15-19 by 9-18 »; dwarf male 6-8 by 36-46 u. TYPE LocaLity: Africa. DistTrRrBuTiIon: Massachusetts. Pate 24. f. 374. 192. Oedogonium sinuatum Transeau; Tiff. Ohio Jour. Sci. 34: 325. 1934. Oedogonium undulatum var. americanum Transeau, Ohio Jour. Sci. 17: 232. 1917. Dioecious, nannandrous, idioandrosporous; oogonia | or 2, subglobose or ellipsoid-globose, with inferior operculum, division wide; oospore globose or nearly so, not filling oogonium; wall smooth; vegetative cell undulate (4 undulate constrictions); dwarf male elongate-obconic, usually on suffultory cell, antheridium interior; vegetative cell (13) 19-26 by 48-110 uw; oogonium 56-68 by 45-80 u; oospore 42-60 by 42-56 uw; holdfast cell 17-18 by 50-60 u. Type LocaLity: Trout Lake, Michigan. DISTRIBUTION: Michigan, Indiana. PuatE 24. f. 372. 193. Oedogonium nodulosum Wittr. Bih. Sv. Vet.-Akad. Handl. 1!: 22. 1872. Monoecious; oogonia 1 or 2, obovoid-globose or more rarely obovoid-ellipsoid, operculate, division superior; oospore globose or subglobose or more rarely globose-ellipsoid, nearly filling oogonium; spore-wall smooth, often thick; antheridia 1-3, subepigynous or hypogynous; sperms 2, division horizontal; basal cell elongate, not constricted; terminal cell obtuse or apiculate; vegetative cell with two undulate constrictions, 20-29 by 30-140 4; oogonium 48-57 by 56-73 »; oospore 46-53 by 49-56 uw; antheridium 18-25 by 7-9 u. TYPE LOCALITY: Sweden. DIstRIBUTION: Michigan. PLatE 23. f. 370, 371. 194. Oedogonium commune (Hirn) Tiff. Ohio Jour. Sci. 34: 325. 1934. Oedogonium nodulosum C.H.S. Phyc. Bor. Am. 74. 1895. Not O. nodulosum Wittr. 1872. Oedogonium nodulosum var. commune Hirn, Acta Soc. Sci. Fenn. 27: 187. 1900. Monoecious; oogonia | or 2, subobovoid-ellipsoid to ellipsoid (rarely globose-ellipsoid), with superior operculum; oospore globose to globose-ellipsoid, practically filling oogonium, its wall smooth and sometimes thick; antheridia 1 or 2, hypogynous or subepigynous, sperms 2, division horizontal; vegetative cell with two undulate constrictions, 22-29 by 35-140 u; oogonium 64-74 by 70-90 wu; oospore 56-70 by 67-80 uw; antheridium 18-26 by 7-10 u. Type LocaLity: Finland. DISTRIBUTION: Massachusetts, Wisconsin. PLATE 23. f. 369. 195. Oedogonium elegans var. americanum Jao, Rhodora 36: 204. 1934. Dioecious, nannandrous, gynandrosporous or (?) idioandrosporous; oogonium solitary, depressed-globose, operculate, division median; oospore depressed-globose, filling the oogonium or not; spore-wall smooth; androsporangia 1 or 2, subhypogynous or scattered, generally a little tumid; wall of vegetative cell, oogonium, and androsporangium densely and minutely granulate; vegetative cell broadly capitellate; terminal cell apically obtuse; basal cell sub- Part I, 1937] OEDOGONIACEAE 75 hemispheric to depressed-globose, wall vertically plicate; vegetative cell 4-8 by 25-68 nu; oogonium 27-32 by 24-27 4; oospore 20-29 by 19-20%; androsporangium 8-10 by 9-13 basal cell 14-17 by 11-13 p. TYPE LOCALITY: Woods Hole, Massachusetts. DISTRIBUTION: Massachusetts. PLATE 22. f. 356-358. 196. Oedogonium minus (Wittr.) Wittr. Nova Acta Soc. Sci. Upsal. TI. 98:9. 1874. Oedogonium punctatostriatum var. minus Wittr. Oefv. Sv. Vet.-Akad. Férh. 27: 123. 1870. Oedogonium spirogranulaium Schmidle, Flora 78:43. 1894. Monoecious; oogonium 1, pyriform-globose or depressed-globose, operculate, division median, wide; oospore depressed-globose, not filling oogonium; spore-wall smooth; antheridia to 10-seriate, subepigynous or subhypogynous or rarely scattered, cell a little tumid; sperm 1; vegetative cell somewhat capitellate; wall of vegetative cell and of oogonium spirally punctate; basal cell depressed-globose or subhemispheric, wall vertically plicate; vegetative cell 9-13 by 30-78 u; oogonium 34-46 by 28-42 wu; oospore 30-42 by 26-36 uw; antheridium 9-13 by 3-5 yu. TYPE LOCALITY: Europe. DistRIBUTION: Michigan, Massachusetts, Florida. PLATE 23. f. 368. 197. Oedogonium spirostriatum Tiff. Trans. Am. Micr. Soc. 55:2. 1936. Monoecious; cogonium single, depressed-globose, with supramedian operculum, wide; oospore depressed-globose, not filling oogonium; wall smooth; antheridium single, alternating with vegetative cell, near oogonium or scattered; sperm single (?); wall of vegetative cell, of oogonium, and of antheridium spirally punctate; basal cell depressed-globose to half-round or nearly spheric, vertically plicate; vegetative cell capitellate, 16-24 by 50-160; oogonium 49-56 by 40-50 u; oospore 40-47 by 34-40 p; antheridium 20-23 by 17-20 nu; basal cell 27— 34 by 22-24 p. TyPE LOCALITY: Arcadia, Florida. DISTRIBUTION: Florida. PLATE 23. f. 366, 367. 198. Oedogonium latiusculum Tiff. Ohio Jour. Sci. 24: 182. 1924. Dioecious, macrandrous; oogonia 1 or 2, globose to ellipsoid-globose, operculate, division median, very wide; oospore of the same form as, and very nearly or completely filling the oogonium; wall smooth; male plant somewhat larger than the female; antheridium 1, usually alternating with a single vegetative cell, sperm 1; vegetative cell distinctly capitellate, basal cell of filament subhemispheric, not elongate; filament not infrequently incrusted with lime; female vegetative cell 10-18 by 16-40», male 14-20 by 16-40 4; oogonium 32-36 by 32-40 p; oospore 28-32 by 28-34 4; antheridium 14-18 by 12-20 p; basal cell 16-24 by 12-16 u. TYPE LOCALITY: Spirit Lake, Iowa. DIstRiIBurtion: Indiana, Iowa, Kentucky, Florida, Alabama, Mississippi; Puerto Rico. PLATE 20. f. 292, 293. 199. Oedogonium patulum Tiff. Ohio Jour. Sci. 34: 324. 1934. Oedogonium Hirnti var. africanum G. West, Jour. Linn. Soc. 38:98. 1907. Monoecious; oogonium single, globose to subglobose, with superior pore; oospore similar to oogonium in shape and usually filling it, its wall smooth; antheridia 1-3, subepigynous, sperms 2, division horizontal; vegetative cell broadly capitellate, 13-15 by 33-60 u; oogonium 39-40 by 38-40 », oospore 33-36 by 33-36 uw; antheridium 13-14 by 5-64. Type LocaLity: Africa. DistR1BuTION: Iowa. Prate 9. f. 110. 76 NORTH AMERICAN FLORA [VoLuME 11 200. Oedogonium capitellatum Wittr. Nova Acta Soc. Sci. Upsal. TIT. 93: 7. 1874. is rs piliferum Wittr. Oefv. Sv. Vet.-Akad. Férh. 27: 122. 1870. Not O. piliferum Auersw. 1855. Monoecious; ocogonium J, subdepressed or depressed-globose, operculate, division median, narrow but distinct; oospore depressed-globose, completing (or nearly so) oogonium; spore-wall smooth; antheridia 1 or 2, subepigynous or hypogynous or rarely scattered; sperm 1 (?); vegetative cell capitellate; basal cell subhemispheric; terminal cell piliform; vegetative cell 6-9 by 20-60 »; cogonium 20-26 by 17-23 u; oospore 18-23 by 15-19 yu; antheridium 6-7 by 8-9 yp; basal cell 16-18 by 6-8 u. TYPE LOCALITY: Sweden. DIsTRIBUTION: Ohio, Illinois, Florida, Alabama, Mississippi, Oklahoma; British Columbia. PLATE 20. f. 306, 307. 201. Oedogonium spurium Hirn, Acta Soc. Sci. Fenn. 27: 301. 1900; Tiff. Trans. Am. Micr. Soc. 55:5. 1936. Monoecious, rarely dioecious; oogonium subglobose to depressed-globose to globose, operculate, division supramedian; oospore depressed-globose, filling oogonium or not; spore- wall smooth; antheridia to 6-seriate, subepigynous or scattered, sperm single; vegetative cell capitellate; basal cell elongate; terminal cell apically obtuse or truncate-obtuse; vegetative cell 7-13 by 20-55 up; oogonium 26-30 by 23-33 uw; oospore 23-28 by 21-26 uw; antheridium 7-8 by 8-1l yu. TYPE LOCALITY: Brazil. DISTRIBUTION: Ohio. PuLatE 19. f. 272-274. 202. Oedogonium ouchitanum Taft, Bull. Torrey Club 62: 288. 1935. Monoecious; oogonia 1 or 2, pyriform to subpyriform, opening by a superior operculum; oospore globose (rarely subglobose), not filling the oogonium longitudinally, its wall smooth; antheridia ?—3, scattered; vegetative cell capitellate; basal cell elongate; terminal cell obtuse; vegetative cell 5-13 by 33-504; oogonium 30-33 by 33-404; oospore 26-30 by 23-30; antheridium 8-9 by 10-13 uw. TYPE LOCALITY: Oklahoma. DIsTRIBUTION: Oklahoma. Puiate 20. f. 303, 304. 203. Oedogonium bohemicum Hirn, Acta Soc. Sci. Fenn. 27: 169. 1900. Monoecious; oogonium 1, globose, operculate, division superior; oospore globose, filling oogonium; spore-wall smooth; antheridia 1-4, subepigynous; sperms 2, division horizontal; vegetative cell capitellate, 10-16 by 21-66 u; cogonium 42-45 by 46-49 wu; oospore 40-43 by 40- 43 w; antheridium 9-10 by 5~7 yu. TYPE LocaLity: Austria. DISTRIBUTION: Illinois, lowa, Oklahoma. PLATE 20. f. 305. 204. Oedogonium Taylorii Jao, Rhodora 36: 211. 1934. Dioecious, nannandrous, idioandrosporous; oogonia 1-3, globose or ellipsoid-globose, with superior pore; oospore globose, very rarely subellipsoid-globose, partly or completely filling the oogonium; spore-wall of three layers, the outer and inner smooth, the middle with 22-28 crenulate to slightly dentate, longitudinally continuous ribs, connected to the disc-shaped and Part 1, 1937] OEDOGONIACEAE 77 reticulate polar regions, polar axis nearly parallel to the filament; suffultory cell enlarged; androsporangia 1-4, mostly terminal on the filament; dwarf male a little curved, on the sufful- tory cell; antheridium 1, exterior; sperm single: vegetative cell capitellate; terminal cell obtuse; basal cell elongate; vegetative cell 8-19 by 38-112 u; suffultory cell 32-34 by 54-74 n; oogonium 35-51 by 46-74 u; oospore 32-46 by 32-51 n; androsporangium 16-18 by 16-23 u; dwarf male stipe 9-13 by 48-51 4; antheridium 6-16 by 4-7 y; basal cell 12-19 by 48-90 u. TYPE LOCALITY: Woods Hole, Massachusetts. DISTRIBUTION: Massachusetts. PLATE 34, f. 529-531; 36. f. 559. 205. Oedogonium Areschougii Wittr. Oefv. Sv. Vet.-Akad. Forh. 27: 122. 1870. Dioecious, nannandrous, gynandrosporous; oogonia 1-6, subdepressed- or depressed-pyri- form-globose, operculate, division median, wide; oospore globose, rarely subdepressed-globose, not completely filling the oogonium longitudinally; spore-wall smooth; androsporangia 1-6, subepigynous or hypogynous or rarely scattered; vegetative cell capitellate; basal cell elongate; terminal cell, usually the oogonium, apically obtuse; dwarf male obovoid, unicellular, on oogo- nium; vegetative cell 8-13 by 35-75 u; oogonium 34-39 by 36-40 u; oospore 22-26 by 22-25 #; androsporangium 9-11 by 10-12; antheridium 6-7 by 13-15 y. TYPE LOCALITY: Sweden. DISTRIBUTION: New Jersey, Florida; Greenland. PLATE 27. f. 424. 205a. Oedogonium Areschougii var. contortifilum Jao, Rhodora 36: 199. 1934. Oogonia 1-7, depressed-globose; filaments often curved or spiral; vegetative cell 7-12 by 30-65 u; oogonium 30-33 by 26-30 y; oospore 26-30 by 24-26 uz; androsporangium 7-8 by 6-12 »; dwarf male 5-7 by 9-12 x; basal cell 9-16 by 26-32 (rarely 64) ». Type LOCALITY: Woods Hole, Massachusetts. DistRIBUTION: Massachusetts. PLATE 27. f. 425-427. 206. Oedogonium subplenum Tiff. Ohio Jour. Sci. 34: 326. 1934. Oedogonium Arveschougii var. americanum Tiff. Bot. Gaz. 83: 205. 1927. Dioecious, nannandrous, idioandrosporous and gynandrosporous; oogonia 1-3, depressed- globose to depressed-pyriform-globose, division median and wide; oospore globose, not filling oogonium, its wall smooth; androsporangia to 11-seriate; dwarf male obovoid, 1-celled, on oogo- nium; vegetative cell capitellate, 7-12 by 23-80 uw; oogonium 29~38 by 26-41 wu; oospore 21-28 by 19-26 uw; androsporangium 7-10 by 7-11 «; dwarf male 6-7 by 6-10 u. TYPE LOCALITY: De Soto, Illinois. DIsTRIBUTION: Massachusetts, Illinois, Florida. PLATE 27. f. 428, 429. 207. Oedogonium pseudoplenum Tiff. Ohio Jour. Sci. 34: 326. 1934. ? Oedogonium obtruncatum var. oblaitum Tilden, Am. Algae 3. 1894. Oedogonium Areschougii {. robustum Hirn, Acta Soc. Sci. Fenn. 27: 271. 1900. Oedogonium Areschougii f. majus Collins, Tufts Coll. Stud. 3: 88. 1912. Dioecious, nannandrous, idioandrosporous; oogonia up to 8-seriate, subdepressed- to pyriform-globose, operculate, division median; oospore globose to depressed-globose, not filling oogonium, its wall smooth; androsporangia to 4-seriate; dwarf male obovoid, unicellular, on oogonium; vegetative cell capitellate, 12-17 by 36-120 y; oogonium 36-40 by 36-53 4; oospore 30-32 by 27-31 wu; androsporangium 9-12 by 10-13 »; dwarf male 6-8 by 14-15 u. TYPE LOCALITY: England. DIsTRIBuTION: Minnesota. Priate 27. f. $30, 431. 208. Oedogonium confertum Hirn, Acta Soc. Sci. Fenn. 27: 272. 1900. Dioecious, nannandrous, idioandrosporous (?); oogonia 1-4, depressed-globose or depressed- pyriform, operculate, division median, wide; oospore globose or, subdepressed-globose, not 78 NORTH AMERICAN FLORA [VoLuME 11 filling oogonium longitudinally; spore-wall smooth; vegetative cell capitellate; dwarf male obovoid, on ocogonium; vegetative cell 19-26 by 66-105 wu; oogonium 56-63 by 44-56 u; oospore 42-48 by 40-44 yw; dwarf male 10-12 by 13-16 pz. TyPe Locauity: Australia. DISTRIBUTION: Ohio, Florida. PLATE 28. f. 448. 209. Oedogonium brasiliense Borge, Bih. Sv. Vet.-Akad. Handi. 2412: 4. 1899. Dioecious, nannandrous, idioandrosporous; oogonia 1-3, subdepressed-globose or sub- pyriform-globose, operculate, division median, broad; oospore subdepressed-globose, not quite filling oogonium; spore-wall smooth; androsporangia to 5-seriate; vegetative cell capitel- late; dwarf male obovoid, unicellular, on oogonium; vegetative cell 16-22 by 35-95 »; oogonium 53-63 by 52-59 wu; oospore 48-53 by 45-50 4; androsporangium 15-16 by 11-14 4; dwarf male 10-12 by 14-19 yw. TYPE LOCALITY: Brazil. DistRIBuTION: Florida. PLATE 28. f. 453. 210. Oedogonium clavatum Hallas, Bot. Tidssk. 26: 399. 1905. Dioecious, nannandrous, gynandrosporous; oogonia 1-3, subpyriform to subdepressed- globose, operculate, division supramedian; oospore subdepressed, depressed-globose, or glo- bose, quite filling oogonium (rarely not); spore-wall smooth; androsporangia 1 or 2, scattered; dwarf male obovoid, unicellular, on oogonium; vegetative cell capitellate or nearly clavate; basal cell subhemispheric; vegetative cell 2-9 by 5-80 u; oogonium 14-26 by 16-21 u; oospore 12-21 by 12-14 uw; androsporangium 4-6 by 5-7 u; dwarf male 6 by 14-15 pu. TyPsé Locality: Denmark. DIstTRIBUTION: New York. PLATE 25. f. 407. 211. Oedogonium oelandicum Wittr. Nova Acta Soc. Sci. Upsal. TIT. 9:17. 1874. Dioecious, nannandrous, gynandrosporous; oogonia 1-7, depressed-globose, with 12-16 longitudinal ridges, operculate, division supramedian, rather broad; oospore depressed-globose, nearly filling oogonium; spore-wall smooth; androsporangia to 6-seriate; vegetative cell capitel- late; terminal cell apically obtuse; dwarf male obovoid, unicellular, on oogonitum; vegetative cell 10-15 by 25-125 y; oogonium 31-40 by 25-32 yu; oospore 25-36 by 23-30 yw; androsporangium 7-12 by 10-18 yw; dwarf male 7-8 by 12-15 pz. TYPE LOCALITY: Sweden. DisTRIBUTION: Michigan, Florida; British Columbia, PLATE 27. f. 434. 21la. Oedogonium oelandicum var. novae-angliae Jao, Rhodora 36: 207. 1934. Oogonia 1-4 with as many as 16 longitudinal ridges; androsporangia 1-7; vegetative cell 9-16 by 32-86 u; sufful- tory cell 13-20 by 30-64 »; oogonium 40-51 by 33-43 y; oospore 35-43 by 30-36 »; androsporangium 11-14 by 9-17 »; dwarf male 8-10 by 9-13 ». ‘Tyre Locality: Woods Hole, Massachusetts. D1s- TRIBUTION: Massachusetts. PLatEe 27. f. 435-437. 212. Oedogonium megaporum Wittr. Bot. Notiser 1872: 3. 1872. Oedogonium oelandicum var. subpyriforme Wittr.; Wittr. & Nordst. Algae Exsicc. 1218. 1896; Bot. Notiser 1897: 84. 1897. Dioecious, nannandrous, idioandrosporous; oogonia 1-6, broadly pyriform, with 12-16 rounded longitudinal ridges, operculate, division supramedian and wide; oospore subdepressed- globose, not filling oogonium; spore-wall smooth; androsporangia to 4-seriate; vegetative cell capitellate; basal cell elongate; terminal cell apically obtuse; dwarf male unicellular, broadly ParT 1, 1937] OEDOGONIACEAE 79 obovoid, on oogonium; vegetative cell 13-17 by 40-100 #; Oogonium 37-42 by 40-45 4; oospore 31-35(38) by 27-30 yw; androsporangium 10-11 by 12-22 uw; dwarf male 8-12 by 13-16 u. TYPE LOCALITY: Sweden. DISTRIBUTION: Michigan. PLATE 28. f. 441, 442, ~ 213. Oedogonium Jaoii Tiffany, sp. nov. Oedogonium boreale var. americanum Jao, Rhodora 36: 199, 1934. Dioecious, nannandrous, idioandrosporous; oogonia 1-4, scattered or more often terminal, depressed-globose to broadly pyriform, wall up to 5 » thick and lamellose, with 16-22 longi- tudinally median folds, operculate, division supramedian and wide, margin slightly undulate; oospore subdepressed-globose, nearly or not filling the oogonium; spore-wall smooth; suffultory cell sometimes tumid, reaching a diameter of 27 yu; androsporangia 1-6, often terminal; dwarf male unicellular, broadly obovoid, situated on the oogonium; vegetative cells capitellate, the lower generally more slender than the upper; terminal cell apically obtuse, often an oogonium or androsporangium; basal cell oblong-elongate; vegetative cell 12-19 by 32-82 u; oogonium 41-54 by 38-54 w; oospore 33-42 by 32-40 uw; androsporangium 12-16 by 12-19 uw; dwarf male 8-13 by 9-13 p; basal cell 19-22 by 32-58 yu. ‘TYPE LocaLity: Woods Hole, Massachusetts. DistTRIBUTION: Massachusetts. PLATE 28. f. 443-445. 214. Oedogonium circinatum Tiff. Trans. Am. Micr. Soc. 55:1. 1936. Dioecious, nannandrous, idioandrosporous (?); oogonia single or in groups of 2, usually terminal, depressed-globose, with 4~9 rounded projections arranged in a median whorl, opercu- late, division inframedian; oospore depressed-globose to nearly globose, not quite filling oogonium, its wall smooth; suffultory cell sometimes enlarged (up to 8 «); upper part of filament nearly always circinate or irregularly contorted; vegetative cell capitellate; terminal cell, usually on oogonium, apically conic; basal cell subhemispheric; dwarf male unicellular, obovoid, small, situated on suffultory cell; vegetative cell 3-6 by 8-32 u; oogonium 16-20 by 12-16 u; oospore 14-18 by 10-13 uw; dwarf male 3-4 by 6-7 yw; basal cell 15-16 by 5-6 uw. TYPE LocaLity: Arcadia, Florida. DISTRIBUTION: Florida. PLATE 27. f. 438, 439. 215. Oedogonium platygynum Wittr. Bot. Notiser 1872: 1. 1872. Ocdogonium platygynum f. majus W. West, Jour. Linn. Soc. 29: 109. 1892. Oedogonium platygynum var. osiliae Skuja, Acta Horti Univ. Latv. 4:34. 1930. Dioecious, nannandrous, gynandrosporous and idioandrosporous; oogonia | or 2, depressed- obovoid, with 7-12 (more often 8) rounded projections arranged in a whorl around the middle, operculate, division inframedian; oospore depressed- or subdepressed-globose, not quite filling oogonium; spore-wall smooth; stffultory cell sometimes tumid; androsporangia 1-3; vegetative cell evidently capitellate; terminal cell apically obtuse; dwarf male unicellular, obovoid, small, on oogonium; vegetative cell 5-11 by 14-50 4; cogonium 20-30 by 16-24 »; oospore 16-24 by 13-20 w; androsporangium 6-8 by 7-8 »; dwarf male 4-6 by 8-12 u. TYPE LOCALITY: Sweden. DISTRIBUTION: Massachusetts, New Jersey, Pennsylvania, Minnesota, Florida. PLATE 27. f. 432. 216. Oedogonium ambiceps (Jao) Tiffany, sp. nov. Oedogonium platygynum var. ambiceps Jao, Rhodora 36: 208. 1934. Dioecious, nannandrous, gynandrosporous; oogonium solitary, depressed-globose, with 8-10 long rounded projections arranged in a whorl about the middle, operculate, division infra- 80 NORTH AMERICAN FLORA [VOLUME 11 median, margin undulate or straight; oospore subglobose to globose, sometimes with low pro- jections like those of the oogonium, quite or rarely nearly filling the oogonium exclusive of the projections; spore-wall smooth; androsporangia 1 or 2, subepigynous or subhypogynous; vegetative cell distinctly capitellate at both ends, 9-13 by 22-42 yu; oogonium 32-38 by 22-29 u; oospore 19-26 by 19-23 uw; androsporangium 11-13 by 3-4 uy. TYPE LOCALITY: Woods Hole, Massachusetts. DISTRIBUTION: Massachusetts. PLateE 28. f. 440. 217. Oedogonium rigidum Hirn, Acta Soc. Sci. Fenn. 27: 237. 1900. Dioecious, nannandrous, gynandrosporous; oogonium 1, obovoid-globose, operculate, division superior; oospore globose, nearly filling oogonium; spore-wall smooth, often thick; androsporangia | or 2, epigynous, subepigynous or hypogynous; vegetative cell broadly capitel- late; terminal cell obtuse; dwarf male curved, on oogonium, antheridium exterior, 1—?; vegeta- tive cell 12-16 by 38-58 4; oogonium 35-43 by 35-48 nu; oospore 32-38 by 32-38 wu; andro- sporangium 10-11 by 11-12 4; dwarf male stipe 7-9 by 18-22 4; antheridium 5-7 by 6-7 u. TYPE LOCALITY: Brazil. DISTRIBUTION: Ohio, Florida, Oklahoma. PLATE 28. f. 446, 447. 218. Oedogonium Taftii Tiffany. Oedogonium subglobosum Taft, Bull. Torrey Club. 62: 289. 1935. Not O. subglobosum Tiff. 1934. Dioecious, nannandrous, (?) idioandrosporous; oogonia 2-10 (rarely single), globose to subglobose, with superior operculum; oospore subglobose, quite filling the oogonium; spore-wall smooth; vegetative cell capitellate; suffultory cell sometimes enlarged; basal cell elongate; dwarf male slightly curved, on the oogonium; antheridia 1 or 2, exterior; vegetative cell 13-20 by 48-83 u; suffultory cell 23-33 by 39-43 »; oogonium 43-50 by 40-50»; oospore 40-46 by 36-40 uw; dwarf male stipe 10-13 by 23-33 uw; antheridium 6-10 by 4-7 p. TYPE LOCALITY: Oklahoma. DISTRIBUTION: Oklahoma. PLATE 28. f. 454-456. 219. Oedogonium Collinsii Tiffany, sp. nov. Oedogonium hians var. megasporum Jao, Rhodora 38:68. 1936. Dioecious, nannandrous, idioandrosporous; oogonia 1~7, subglobose, operculate, division superior; oospore globose, rarely subglobose, nearly filling or filling oogonium transversely; spore-wall smooth and thick; androsporangia 1-3-?; suffultory cell swollen; dwarf male slightly curved, attached to suffultory cell; antheridium exterior; vegetative cell capitellate; basal cell tumid; terminal cell obtuse; vegetative cell 11-19 by 64-102 yu; suffultory cell 35-38 by 64- 74 4; oogonium 45-55 by 48-63 4; oospore 44-48 by 44-58 uw; androsporangium 19-20 by 22-26 w; dwarf male stipe 11-13 by 39-45 y; antheridium 8-10 by 6-8 yz. TYPE LOCALITY: Woods Hole, Massachusetts. DISTRIBUTION: Massachusetts. Priate 29. f. 459, 460. 220. Oedogonium michiganense Tiff. Bot. Gaz. 83: 205. 1927. Dioecious, nannandrous, gynandrosporous; oogonia 1-7, globose to ellipsoid-globose (rarely subglobose), operculate, division at the upper extremity of the oogonium; oospore globose, filling the oogonium or not; outer layer of spore-wall smooth, the middle with 12-24 crenulate, sometimes anastomosing, longitudinal ribs, the inner smooth; suffultory cell en- larged; vegetative cell broadly capitellate; basal cell elongate; terminal cell, occasionally oogonium, apically obtuse; dwarf male a little curved, on suffultory cell, antheridium interior; vegetative cell 12-24 by 80-160 u; suffultory cell 32-48 by 64-80 »; oogonium 50-64 by 50-80 4; Part 1, 1937] OEDOGONIACEAE 81 oospore 44-60 by 44-60 u; androsporangium 16-20 by 16-20 #; dwarf male 14-20 by 40-56 BS basal cell 18-20 by 70-100 x. TYPE LOCALITY: Douglas Lake, Michigan. DISTRIBUTION: Michigan, PLATE 29, f. 457, 458. 221. Oedogonium praticolum Transeau, Am. Jour. Bot. 1:298. 1914. Dioecious, nannandrous, idioandrosporous; oogonia 1-7, ellipsoid to globose-ellipsoid, often terminal, sometimes scattered; wall sometimes rather thick, operculate, division supreme, lid small and deciduous; oospore ellipsoid to globose-ellipsoid, quite filling the oogonium, its wall smooth; androsporangia 1-20; vegetative cell slightly capitellate; basal cell usually elongate; terminal cell apiculate or extended into a long hyaline seta; antheridium exterior, 1; female vegetative cell 16-26 by 65-130 yn; vegetative cell of androsporangial filament 14~22 by 56- 110 4; oogonium 48-60 by 62-74 u; oospore 46-58 by 60-72 u; androsporangium 20-24 by 18-22 w; dwarf male stipe 8-14 by 21-28 x; antheridium 6-10 by 7-12 u. TYPE LocaLity: Charleston, Illinois. DIstTRiBuTiIoN: Ohio, Illinois, Iowa. PLATE 29. f. 461-463. 222. Oedogonium supremum ‘Tiff. Ohio Jour. Sci. 24: 185. 1924. Dioecious, nannandrous, idioandrosporous; oogonia 1-4, globose or ellipsoid-globose, often terminal, operculate, division at the upper extremity of oogonium, lid often deciduous; oospore globose or ellipsoid-globose, filling oogonium; spore-wall smooth; androsporangia 1-6; vegetative cell distinctly capitellate; basal cell elongate; dwarf male broadly obovoid, unicellular, on oogonium; vegetative cell 24-32 by 60-132 Hj; oogonium 66-78 by 72-90 yp; oospore 60-66 by 66-84 uw; androsporangium 26-28 by 30-40 u; dwarf male 20-24 by 24-26 u; basal cell 28-32 by 90-110 p. Type LocaLity: West Lake Okoboji, Iowa. DISTRIBUTION: Iowa. PLATE 29. f. 464-467. 223. Oedogonium wabashense Tiff. Bot. Gaz. 83: 203. 1927. Dioecious, nannandrous, gynandrosporous; oogonia 2 or 3, ellipsoid or ovoid, often terminal, operculate, division supreme, lid often deciduous; oospore ellipsoid or ovoid (rarely globose), filling oogonium or not; spore-wall smooth; androsporangia 1-3, subepigynous; vegetative cell capitellate; basal cell elongate; dwarf male on oogonium; antheridia 1-?; vegetative cell 12~—20 by 36-64 u; oogonium 36-42 by 44-60 uw; oospore 34-38 by 40-55 yu; androsporangium 12-16 by 10-20 »; dwarf male stipe 12-16 by 24-40 u; antheridium 7-12 by 6-10 u; basal cell 18-20 by 40-64 yu. TYPE LocaLiry: Vincennes, Indiana. DIstRI@BuTION: Indiana, Ohio, Florida. PLate 28. f. $51, 452. 224, Oedogonium suborbiculare Jao, Rhodora 38:69. 1936. Dioecious, macrandrous; oogonia 1-10, subglobose or ellipsoid-globose, pore superior; oospore globose, sometimes subglobose, not filling or nearly filling the oogonium; spore-wall of three layers, the outer and inner smooth, the median scrobiculate, the scrobiculations more or less concentrically arranged and varying in diameter; suffultory cell sometimes slightly enlarged; antheridia 1-3, sperms 2, division horizontal; basal cell elongate; vegetative cells capitellate, the female 22-32 by 112-218 4, male 19-22 by 130-210 u; suffultory cell 22-38 by 118-200 BS cogonium (with prolongations) 64-74 by 77-1144; oospore 54-67 by 54-67 4; antheridium 16-18 by 13~16 uw; basal cell 25-32 by 166-180 p. TYPE LOCALITY: Near Woods Hole, Massachusetts. DISTRIBUTION: Massachusetts. PLATE 18. f. 250, 251. 82 NORTH AMERICAN FLORA [VoLUME 11 225. Oedogonium completum (Hirn) Tiff. Ohio Jour. Sci. 34: 326. 1934. Oedogonium obtruncatum var. completum Hirn, Acta Soc. Sci. Fenn. 27: 285. 1900. Dioecious, nannandrous, gynandrosporous; oogonia 1-3, broadly ellipsoid, operculate, division supreme, operculum small and deciduous; oospore broadly ellipsoid, nearly filling oogonium; spore-wall smooth; androsporangia 1-5, hypogynous or epigynous or subepigynous; terminal cell sometimes setiform; vegetative cell capitellate, 18-22 by 66-150 »; oogonium 55-60 by 63-75 uw; oospore 53-58 by 61-73 nh; androsporangium 20-22 by 19-22 u. TYPE LOCALITY: Asia. DISTRIBUTION: Florida. PLATE 25. f. 404-406. 226. Oedogonium latviense (Tiff.) Tiff. Ohio Jour. Sci. 34:325. 1934. Oedogonium spirale var. latviense Tiff. Ohio Jour. Sci. 29:75. 1929. Dioecious, nannandrous, idioandrosporous; oogonium 1, subglobose or ovoid-globose, pore supramedian to superior; oospore globose or subglobose, not or nearly filling oogonium; spore- wall double, the outer layer with 5-6 spirally arranged ribs, the inner smooth; dwarf male a little curved, on suffultory cell, antheridium exterior, 1; vegetative cell 16-22 by 65-120 yu; oogonium. 49-60 by 50-65 4; oospore (without ribs) 35-45 by 35-45 y; dwarf male stipe 10-12 by 15-20 pz. Type LocaLity: Latvia. DISTRIBUTION: Puerto Rico. PLATE 31. f. 500. 227. Oedogonium pusillum Kirchner, Krypt.-Fl. Schles. 2!: 59. 1878; Tiffany, char. emend. ? Oedogonium excisum Wittr. & Lundell; Nordst. Acta Univ. Lund 167: 13. 1880. Oedogonium africanum Lagerh. Nuova Notar. 4: 155. 893. Oedogonium Klebahnii Lemmerm. Abh. Nat. Ver. Bremen 12: 509. 1893. Monoecious; oogonium | (rarely 2), subbiconic-ellipsoid or subbiconic-globose, seen from above circular, margin even, operculate, division wide (up to 2.5 4); oospore ellipsoid or globose, generally constricted at the middle, not quite filling oogonium; spore-wall smooth; antheridia 1 or 2, subepigynous, sperm 1 (?); basal cell subhemispheric; terminal cell obtuse or obtusely conic; vegetative cell 3~6 by 10-60 »; oogonium 14-16 by 15-25 uw; oospore 11-13 by 13-15 y; antheridium 3-4 by 5-6 yu; basal cell 7-8 by 7-8 yn. Type LOCALITY: Germany and Michigan. DISTRIBUTION: Massachusetts, Ohio, Michigan, Hlinois, lowa, Oklahoma, Florida; Canada. PLATE 19. f. 287. Note: The completed description is made possible through material collected in Michigan by Dr. C. E. Taft. SPECIES INCOMPLETELY DESCRIBED 228. Oedogonium Oryzae Wittr. Oefv. Sv. Vet.-Akad. Forh. 33°: 51. 1876. Oogonia 1 or 2, scarcely tumid, subobovoid or subcylindric, pore superior; oospore of same form as oogonium, nearly filling it or sometimes enlarging it; spore-wall smooth; basal cell elongate; terminal cell acuminate; vegetative cell 24-39 by 36-120 u; suffultory cell 45 by 56-90 w; single oogonium or upper series 45-55 by 65-95 u; lower series 43-53 by 45-57 x; oospore 41-51 by (44)60—80 u. TYPE LOCALITY: Italy. DisTRIBUTION: Iowa, North Carolina, Mississippi. PuaTeE 7. 7. 81, 82. ParT 1, 1937] OEDOGONIACEAE 83 229. Oedogonium consociatum Collins & Hervey, Proc. Am. Acad. 53:36. 1917. Dioecious, macrandrous (?); oogonium single, globose to depressed- -globose, operculate, division median to superior, narrow but distinct; oospore globose to depressed-globose, filling oogonium ; spore-wall smooth; basal cell depressed-globose; vegetative cell, 6—-12(20) by 6-50 yp; oogonium 27-28 by 26~28 u; cospore 26 by 24-26 yw; basal cell 20~24 by 12-16 nu. TYPE LOCALITY: Bermuda. DISTRIBUTION: Bermuda. PuatE 7. f. 80. 230. Oedogonium sancti-thomae Wittr. & Cleve; Wittr. Nova Acta Soc. Sci. Upsal. ITI. 93: 40. 1874. Dioecious; oogonia 1-3, pyriform, operculate, division superior; oospore pyriform-obovoid, not quite filling oogonium; spore-wall smooth; basal cell subhemispheric; terminal cell very slender, subhyaline; vegetative cell 7-15 by 16-88 4; oogonium 28-33 by 36-50 4; oospore 25-30 by 28-35 yw; basal cell 14-23 by 8-12 yu. TYPE LOCALITY: St. Thomas, West Indies. DISTRIBUTION: Massachusetts, Ohio, Michigan, Mississippi, Oklahoma; St. Thomas. PLATE 19. f. 277. 231. Oedogonium tapeinosporum Wittr. Nova Acta Soc. Sci. Upsal. III. 9%: 36. 1874. Oedogonium tapeinosporum var. angolense W. & G. West, Jour. Bot. 35:5. 1897. Oogonia 1 or 2, depressed-globose, operculate, division median, distinct; oospore depressed- globose, not (rarely nearly) filling oogonium; spore-wall smooth; basal cell subhemispheric; ter- minal cell obtuse; vegetative cell (2-)3-5 by 10-40; oogonium 14-19 by (14-)17-23 yu; oospore 13-16 by 8-14 yw; basal cell 8-14 by 5-7 yu. TYPE LOCALITY: Brazil. DISTRIBUTION: Massachusetts, Michigan, Iowa, Florida, Oklahoma; British Columbia. PLATE 19. f. 276. 232. Oedogonium flexuosum Hirn, Acta Soc. Sci. Fenn. 27: 313. 1900. Dioecious; oogonium 1, obovoid or obovoid-globose, operculate, division superior; oospore same form as oogonium and filling it; spore-wall smooth; filament irregularly curved; vegetative cell 15-18 by 12-32 2; oogonium 29-34 by 29-43 »; oospore 27-32 by 27-37 w; basal cell 32 by 164. TYPE LOCALITY: Spain. DISTRIBUTION: Puerto Rico. PLaTE 7. f. 79. 233. Oedogonium fonticola A. Br.; Kiitz. Sp. Alg. 368. 1849. Oedogonium rhodosporum Wittr. Nova Acta Soc. Sci. Upsal. IT. 9%: 47. 1876. Dioecious; oogonia 1 or 2, obovoid or globose-obovoid, operculate, division superior; oospore obovoid-ellipsoid or subglobose, nearly or quite filling oogonium; spore-wall smooth; vegetative cell 16-32 by 12-70 n; oogonium 36—43(45) by 43-56 4; oospore 34-41(43) by 40-49 u. TYPE LocaLity: Germany. DIstRIBUTION: Ohio, Iowa, Indiana, Mississippi. PLATE 23. f. 363. 84 NORTH AMERICAN FLORA [VoLUME 11 234. Oedogonium poecilosporum Nordst. & Hirn; Hirn, Acta Soc. Sei. Fenn. 27: 298. 1900. Oogonia 1 or 2, ellipsoid to depressed-globose (sometimes globose to subglobose), opercu- late, division median, wide (2-3.5 4); oospore of the same form as the oogonium and nearly filling it; spore-wall smooth; terminal cell apically obtuse; vegetative cell 6-8 by 20-47 u; oogonium 24-28 by 25-28 yu; oospore 23-26 by 21-28 u. TYPE LOCALITY: Africa. DISTRIBUTION: Michigan. PLATE 19. f. 286. 235. Oedogonium giganteum Kiitz. Phye. Germ. 200. 1845; Wittr. Nova Acta Soc. Sci. Upsal. ITI. 93: 42. 1874. Dioecious (?), macrandrous; oogonium 1, cylindric-obovoid, pore superior; oospore cylin- dric-ellipsoid or subellipsoid, nearly filling oogonium; spore-wall in three layers, the outer and inner smooth, the middle with 25-30 longitudinal rows of pits; vegetative cell 30-50 by 60- 225 pw; suffultory cell 40-60 by 60-210 yu; oogonium 53-69 by 67-106 yu; oospore 51-65 by 103 u. TYPE LOCALITY: Germany. DistTRisuTIon: Iowa, Oklahoma. Puats 7. f. 83. 236. Oedogonium inconspicuum Hirn, Acta Soc. Faun Fl. Fenn. 116: 23. 1895. ? Ce eee Grun.; Rab. Fi. Eur. Alg. 3: 352. 1868; Hansg. Beith. Bot. Centr. 187: 436. 5. . (Dioecious, macrandrous ?) oogonia 1-4, depressed- or subpyriform-globose, operculate, division median, narrow; oospore depressed-globose (rarely ovoid), filling the inflated part of oogonium; spore-wall smooth; vegetative cell 3-5 by 20-34 4; oogonium 13-18 by (13)17-23 p; oospore 12-17 by 8-12 pu; basal cell 10-18 by 4-8 yz. TYPE LOCALITY: Austria. DistTRiBution: Ohio, Indiana, Florida; Puerto Rico. PLATE 19. f. 288, 289. ExTRA-LIMITAL SPECIES The keys under the three genera provide for the identification of extra-limital species and varieties, since their existence in North America is possible. For descriptions and illustrations of these species and varieties, so far as they were known in 1930, the reader may consult Tiff. Oedogon. Monog. (1930). Additional species, described since 1930, and new names proposed since that date are listed below, with citations to a description under another name or to the place of original publication. BULBOCHAETE GLABRA (Hirn) Tiff. Ohio Jour. Sci. 34: 323. 1934. Bulbochaete sessilis f. glabra Hirn; Tiff. Oedog. Monog. 39. 1930. BULBOCHAETE LITORALIS (Hirn) Tiff. Ohio Jour. Sci. 34: 323. 1934. Bulbochaete rhadinospora var. litoralis Hirn; Tiff. Oedog. Monog. 47. 1930. BULBOCHAETE NORVEGICA (Wittr.) Tiff. Ohio Jour. Sci. 34: 323. 1934. Bulbochaete tenuis var. norvegica (Wittr.) Hirn; Tiff. Oedog. Monog. 44. 1930. BULBOCHAETE REGALIS (Wittr.) Tiff. Ohio Jour. Sci. 34: 323. 1934. Bulbochaete im- perialis var. regalis Wittr.; Tiff. Oedog. Monog. 49. 1930. BuLBOCHAETE WORONICHINI Tiff. Ohio Jour. Sci. 34: 323. 1934. Bulbochaete Brebissontt var. minor Woronichin; Tiff. Oedog. Monog. 34. 1930. OEDOGONIUM ACMANDRIUM var. STICTOSPERMUM Skuja, Acta Horti Univ. Latv. 4: 30. 1930. OEDOGONIUM ACUMINATUM (Hirn) Tiff. Ohio Jour. Sci. 34: 326. 1934. Ocedogonium macrandrium {. acuminaium Hirn; Tiff. Oedog. Monog. 151. 1930. Part 1, 1937] OEDOGONIACEAE 85 OEDOGONIUM BorGE! (Hirn) Tiff. Ohio Jour. Sci. 34: 326. 1934. Borgei Hirn; Tiff. Oedog. Monog. 154. 1930. OEDOGONIUM BREVICINGULATUM Jao, Papers Mich. Acad. 20:57. 1935. OEDOGONIUM CALCAREUM var. AFRICANUM P. Frémy, Bull. Soc. Hist. Nat. Afr. Nord 21: 74. 1930. Oedogonium columbianum (G. West) ‘Tiffany, sp. nov. Oedogonium fabulosum var. columbianum G. West, Mém. Soc. Neuchat. Sci. Nat. 5: 1048. 1914; Tiff. Oedog. Monog. 84. 1930. OEDOGONIUM COSTATOSPORUM Jao, Papers Mich. Acad. 19: 88. 1934. OEDOGONIUM CYMATOSPORUM var. CHUNGKINGENSE Jao, Papers Mich. Acad. 19:91. 1934, OEDOGONIUM EMINENS (Hirn) Tiff. Ohio Jour. Sci. 34: 326. 1934. Oedogonium monile var. eminens Hirn; Tiff. Oedog. Monog. 154. 1930. OEDOGONIUM EXCAVATUM Jao, Papers Mich. Acad. 19: 90. 1934. OEDOGONIUM EXMONILE Tiff. Ohio Jour. Sci. 34: 326. 1934. Ocedogonium monile f. victoriense G. West; Tiff. Oedog. Monog. 154. 1930. OEDOGONIUM EXOSTRIATUM Tiff. Ohio Jour. Sci. 34: 326. 1934. O8edogonium oelandicum f. minus Borge; Tiff. Oedog. Monog. 142. 1930. OEDOGONIUM ExoTICUM (Hirn) Tiff. Ohio Jour. Sci. 34: 326. 1934. O¢edogonium Cleve- anum f{. exoticum Hirn; Tiff. Oedog. Monog. 138. 1930. OEDOGONIUM HERJEDALICUM Cedergr. Ark. Bot. 25A‘: 95. 1932. OEpoconiuM ILsTreRr Skuja, Acta Horti Univ. Latv. 7:59. 1934. OEDOGONIUM INFRAMEDIALE Jao, Papers Mich. Acad. 20:59. 1935. OEDOGONIUM INTERMEDIUM vat. SZECHWANENSE Jao, Papers Mich. Acad. 19: 89. 1934. OEDOGONIUM MAxIMuM W. & G. West. O0edogonium fabulosum var. maximum Hirn; Tiff. Oedog. Monog. 83. 1930. OEDOGONIUM OBLONGUM var. FUSIFORME Jao, Papers Mich. Acad. 20: 60. 1935. OEDOGONIUM OPERCULATUM Tiff. Trans. Am. Micr. Soc. 55:2. 1936. OEDOGONIUM ORIENTALE Jao, Papers Mich. Acad. 19: 85. 1934. OEDOGONIUM PARAGUAYENSE Tiff. Ohio Jour. Sci. 34: 324. 1934. O¢edogonium fabulosum var. punctatum Lemmerm.; Tiff. Oedog. Monog. 84. 1930. OEDOGONIUM PEIPINGENSE Jao, Papers Mich. Acad. 20: 58. 1935. OEDOGONIUM PORRECTUM var. AFRICANUM Nygaard, Trans. Roy. Soc. 8. Afr. 20: 136. 1932, OEDOGONIUM PSEUDOSPIRALE Nygaard, Trans. Roy. Soc. S. Afr. 20: 136. 1932. OEDOGONIUM RECTANGULARE (Rich) Tiff. Ohio Jour. Sci. 34: 326. 1934. Oedogonium concatenatum var. rectangulare Rich; Tiff. Oedog. Monog. 137. 1930. OEDOGONIUM RoBUSTUM (W. & G. West) Tiff. Ohio Jour. Sci. 34:324. 1934. Oedogonium ragile var. robustum (W. & G. West) Tiff.; Tiff. Oedog. Monog. 75. 1930. OEDOGONIUM SINENSE Li, Ohio Jour. Sci. 33: 152. 1933. OXEDOGONIUM SPIRALIDENS Jao, Papers Mich. Acad. 19: 84. 1934. OEDOGONIUM STEPHENSIAE Tiff. Trans. Am. Micr. Soc. 55: 2. 1936, OEDOGONTUM sUBGLOBOSUM (Wittr.) Tiff. Ohio Jour. Sci. 34: 325. 1934. Oedogonium Hystrix var. subglobosum Wittr.; Tiff. Oedog. Monog. 121. 1930. Ocedogonium monile f. PLATE 1 Fig. 1. Bulbochaete monile Wittr. & Lundell. Fig.6. Bulbochaete basispora Wittr. & Lundell - Fig. 2. Bulbochaete robusta (Hirn) Tiff. Fig. 7. Bulbochaete nana Wittr. Fig.3. Bulbochaete Debaryana Wittr. & Lundell. Fig. 8. Bulbochaete scrobiculata Tiff. Fig. 4. Bulbochaete mirabilis Wittr. Fig.9. Bulbochaete Brebissoniit Kiitz. Fig.5. Bulbochaete mirabilis var. gracilis Fig.10. Bulbochaete angulosa Wittr. & Lundell. (Pringsh.) Hirn. Fig. 11. Bulbochaete elatioy Pringsh. (Figs. 1, 3-5, 7, 9-11 redrawn from Hirn.) NORTH AMERICAN FLORA VOLUME 11, PLATE 1 BULBOCHAETE Fig. 12. Fig. 13. Fig. 14. Fig. 15. W: Fig. 16. ittr. Bulbochaete suberecta (Collins) Tiff. PLATE 2 Bulbochaete Furberae Collins. Fig. 17. Bulbochaete crenulate Pringsh. Bulbochaete minuta W. & G. West. Figs. 18,19. Bulbochaete polyandria Cleve. Bulbochaete intermedia De Bary. Fig. 20. Bulbochaete Nordstedtiit Wittr. Bulbochaete intermedia var. depressa Figs. 21,22. Bulbochaete congener Hirn. Fig. 23. Bulbochaete depressa Taft. (Fig. 12 redrawn from Lewis: 13, from West; 23, after Taft.) PLATE 3 Figs. 24,25. Bulbochaete gigantea Pringsh. Fig. 29, Bulbochaete crassa Pringsh. Fig. 26. Bulbochaete obliqua Lundell. Fig. 30. Bulbochaete setigera (Roth) Ag. Fig. 27. Bulbochaete sessilis Wittr. Fig. 31. Bulbochaete valida Wittr. Fig. 28. Bulbochaete alabamensis Transeau & Brown. (Figs. 26, 27, 31 redrawn from Hirn.) Piate 4 Figs. 32,33. Bulbocheete crassiuscula Nordst. Figs. 38,39. Bulbochaete praereticulata Jao* Fig. 34. Bulbochaete quadrata Wittr. Fig. 40. Bulbochaete cimarronea Taft. Figs. 35,36. Bulbochaete alpina Taft. Fig. 41. Bulbochaete pygmaea Pringsh. Fig. 37. Bulbochaete dispar Wittr. Figs. 42,43. Bulbochaete pygmaea var. erecta Jao’ (Figs. 32-34, 37, after Hirn; 35, 36, 40 after Taft; 42, 43 after Jao.) NORTH AMERICAN FLORA VOLUME 11, PLATE 4 BULBOCHAETE Puate 5 Fig. 44. Bulbochaete minor A. Br. Figs. 45, 46. Bulbochaele Bullardi Transeau & iff. Fig. 47. Bulbochaete varians Wittr. Fig. 48. Bulbochaete varians var. subsimplex (Wittr.) Hirn. Fig. 49. Bulbochaete varians var. hawaiensis Nordst. (Figs. 50, 52 redrawn from Hirn.) Bulbochaete hiloensis (Nordst.) Tiff. Bulbochaele insignis Pringsh. Bulbochaete reticulata Nordst. Bulbochaete rectangularis Wittr. Bulbochaete tenuis (Wittr.) Hirn. PLATE 6 Figs. 55,56. Bulbochaele areolata Taft. Figs. 63-65. Ocedocladium medium 1. F. Lewis. Fig.57. Bulbochaete repanda Wittr. Figs. 66-69. Ocedocladium albemarlense I. F. Figs. 58,59. Ocedocladium operculatum Tiff. Lewis. Figs. 60-62. Ocedocladium Wettsteinii E. Knapp. (Figs. 55, 56, after Taft; 60-62 after Knapp; 63-65 from Tiffany after Lewis; 66-69 after Lewis.) VOLUME 11, PLATE 6 NORTH AMERICAN FLORA BULBOCHAETE, OEDOCLADIUM PLATE 7 Figs. 70-78. Ocedocladium Hazenii 1. F. Lewis. Fig.79. Oedogonium flexuosum Hirn. (71, escape of androspores from andro- Fig. 80. Oedogonium consociatum Collins & sporangia; 75, sporeling with both rhi- Hervey. = zoidal and green cells of vegetative fila- Figs. 81,82. Oedogonium Oryzae Wittr. ment; 76-78, stages in germination of Fig. 83. Oe¢edogonium gigantewm Kiitz. zoospore.) (Figs. 70-78 from Tiffany after Lewis; 79, 81-83 redrawn from Hirn; 80 from Collins.) OEDOCLADIUM, OEDOGONIUM PLatTE 8 Fig. 84. Ocedogonium Franklinianum Wittr. Fig. 85. Oedogonium cymatosporum Wittr. & Nordst. Fig. 86. Oedogonium Magnusii Wittr. Fig. 87. Oedogonium moniliforme Wittr. Fig. 88. Oedogonium areoliferum (Jao) Tiff. Figs. 89,90. Oedogonium curvum Pringsh. Figs. 91,92. Oedogonium santurcense Tiff. Fig. 93. Oedogonium suecicum Wittr. Fig. 94. Oedogonium australe (G. West) Tiff. Figs. 95,96. Oedogonium sociale Wittr. Figs. 97,98. Oedogonium plusiosporum Wittr. Fig. 99. Oedogonium laeve Wittr. Figs. 100-102. Ocedogonium rufescens Wittr. Fig. 103. Oedogonium vulgare (Wittr.) Tiff. Fig. 104. Ocedogonium cryptoporum Wittr. Fig. 105. Oedogonium rufescens var. exiguum (Elfv.) Tiff. Figs. 106, 107. Oedogonium rufescens var. Lun- dellii (Wittr.) Tiff. (Figs. 85, 86, 95-98, 106, 107 redrawn from Hirn; 88 after Jao.) NORTH AMERICAN FLORA a ] T VOLUME 11, PLATE 8 ne TTI é 95 50 MICRONS EA I OEDOGONIUM PLATE 9 Fig. 108. Oedogonium cardiacum (Hassall) Wittr. Fig. 109. Oedogonium Hirnii Gutw. Fig. 110. Oedogonium patulum Tiff. Figs. 111,112. Oedogonium glabrum Hallas. Fig. 113. Oedogonium Lemmermannii Tiff. Fig. 114. Oedogonium varians Wittr. & Lundell. Fig. 115. Oedogonium curtum Wittr. & Lundell. ig. 121. ig. 116. ig. 117. Ocedogonium tyrolicum Wittr. Oedogonium ohsoletum Wittr. . 118. Oedogonium lautumniarum Wittr. - 119. Oedogonium intermedium Wittr. . 120. Oedogonium globosum Nordst. Oedogonium cardiacum var. carboni- cum Wittr. (Figs. 108, 115, 117, 118, 120 redrawn from Hirn; 111, 112, from Hallas.) NORTH AMERICAN FLORA VOLUME 11, PLATE 9 OEDOGONIUM Figs. Figs. Figs. Figs. 122, 123. 124,125. A Br. 126, 127. 128, 129. merm. PLatEe 10 Oedogonium Sodiroanum Lagerh. Oedogonium Vaucherii (Le Clerc) Oedogonium biforme Nordst. Oedogonium Richterianum Lem- Fig. 130. Oedogonium pseudo-Boscii Hirn. Fig. 131. Oedogonium fennicum (Tiff.) Tiff. ae 132. Oedogonium fragile Wittr. Fig. 133. Oedogonium upsaliense Wittr. Figs. 134-136. Oedogonium lageniforme Hirn. Fig. 137. Oedogonium oviforme (Lewin) Hirn,. (Figs. 126-129 redrawn from Hirn; 130 from Silfvenius.) PLatTe 11 Fig. 138. Oedogonium geniculatum Hirn. Figs. 145, 146. Oedogonium mexicanum Wittr. Figs. 139, 140. Oedogonium rivulare (Le Clerc) Figs. 147-150. Oedogonium princeps (Hassall) A. Br. Wittr. Figs. 141, 142. Oedogonium plegiostomum Wittr. Figs. 151,152. Oedogonium capillare (L.) Kitz. Figs. 143, 144. Oedogonium gracilius (Wittr.) Fig. 153. Oedogonium capillare f. stagnale Tift. (Kiitz.) Hirn. (Figs. 139-142, 145, 146, 153 redrawn from Hirn.) NORTH AMERICAN FLORA VOLUME 11, PLATE 11 OEDOGONIUM Figs Figs Figs Figs. PLATE 12 . 154-156. Ocedogonium anomalum Hirn. . 157,158. O9edogonium capilliforme Kitz. . 159, 160. Oedogonium capilliforme f De- beryanum (Chmiel.) Hirn. 161-163. Oedogonium capilliforme var. australe Wittr. (Figs. 164-167 redrawn from Hirn.) Fig. 164. Oedogonium martinicense Hirn. Fig. 165. Oedogonium Kurzii G. Zeller. Figs. 166, 167. Tiff. Oedogonium diversum (Hirn) PLATE 12 NORTH AMERICAN FLORA VOLUME 11, OEDOGONIUM PLATE 13 Figs. 168, 169. Ocedogonium oboviforme Wittr. Figs.170,171. Oedogonium majus (Hansg.) Tiff. Figs. 172-174. Oedogonium grande Kiitz. Fig. 175. Oedogonium grande var. aequatoriale Wittr. Figs. oe 78. Oedogonium angustum (Hirn) iff. Figs. 179-181. Oedogonium pachyandrium Wittr. (Figs. 168, 169, 175-181 redrawn from Hirn.) NORTH AMERICAN FLORA VOLUME 11, PLATE 13 176 172 50 MICRONS 173 = eB ye 168 OEDOGONIUM PLatTe 14 Figs. 182, 183. Oedogonium amplum Magnus & Figs. 188,189. Oedogonium Landsboroughi var. Wille. norvegicum Wittr. 5 Figs. 184, 185. Oedogonium crassum (Hassall) Figs. 190,191. Ocedogonium fabulosum Hirn. Wittr. Figs. 186, 187. Oedogonium Landsborough (Hassall) Wittr. (Figs. 182, 183, 190, 191 redrawn from Hirn.) PLATE 14 VOLUME 11, NORTH AMERICAN FLORA 50 MICRONS 185 OEDOGONIUM PLATE 15 Figs. 192, 193. Oedogonium longum (Transeau) Fig. 207. O¢edogonium crenulatocostatum var. ‘Transeau. cylindricum (Hirn) Tiff. Figs. 194-196. Ocedogonium subrectum Hirn. Fig. 208. Oedogonium paludosum (Hassall) Figs. 197, 198. Oedogonium paulense Nordst & Wittr. Hirn. Fig. 209. Ocedogonium paludosum var. parvi- Figs. 199-203. Oedogonium exocostatum Tiff. Sporum Hirn. Figs. 204-206. Oedogonium crenulatocostatum Fig.210. Oedogonium carolinianum Tiff. Wittr. (Figs: 194-196 redrawn from Hirn; 197 from Schmidle.) PLATE 16 Figs. 211-213. Tiff. Figs. 214, 215. Oedogonium Boscii (Le Clerc) t: Oedogonium occidentale (Hirn) Wittr. Fig. 216. Oedogonium Boscii {. dispay Hirn. Fig. 217. Oedogonium aureum (Tilden) Tiff. Figs. 218, 219. Oedogonium subareolaium Tiff. Fig. 220. Oedogonium arcyosporum Nordst. & Hirn. Figs. 221-223. Oedogonium areolatum Lagerh., Fig. 224. Ocedogonium dictyosporum Wittr. Fig. 225. Oedogonium scrobiculaium Wittr. Figs. 226, 227. Oedogonium longiarticulatum (Hansg.) Tiff. Fig. 228. O¢edogonium foveolatum Wittr. Figs. 229-231. Oedogonium figuratum Tiff. (Figs. 211-213, 216, 217, 220-225, 228 redrawn from Hirn.) NORTH AMERICAN FLORA VOLUME 11, PLATE 16 OEDOGONIUM PLATE 17 Figs. 232-234. Oedogonium verrucosum Hallas. Figs. 239-243. Oedogonium indianense Britton Figs. 235, 236. Oedogonium taphrosporum & Smith. Nordst. & Hirn. Figs. 244, 245. Oedogonium punctatum Wittr. Figs. 237, 238. Oedogonium argenieum Hirn. Figs. 246-249. Ocedogonium Wyliei Tiff. (Figs. 232-234 redrawn from Hallas; 235, 236, 244, 245 from Hirn.) NORTH AMERICAN FLORA VOLUME 11 PLATE 17 232 234 | 50 MICRONS OEDOGONIUM 248 249 PLatTs 18 Figs. 250, 251. Oedogonium suborbiculare Jao. Figs. 258-260. Oedogonium americanum Tran- Figs. 252, 253. Oedogonium pseudacrosporum seat. Wittr. Fig. 261. Oedogonium nobile Wittr. Figs. 254-257. Oedogonium Tiffanyi Ackley. Fig. 262. Oedogonium nobile var. minus Hirn. (Figs. 250, 251 after Jao; 252, 253, 261, 262 redrawn from Hirn.) VOLUME 11, PLATE 18 NORTH AMERICAN FLORA UT ma PN a 258 50 MICRONS 251 UJ 250 OEDOGONIUM PLATE 19 Figs. 263, 264. O¢edogonium paucocostatum ‘Transeau. Fig. 265. Figs. 266 Oedogonium paucostriatum "Tiff. , 267. Ocdogonium eriense Tiff. Figs. 268,269. Oedogonium reticulocostatum Jao. Figs. 270 , 271. Oedogonium mitratum Hirn. Figs. 272-274. Oedogonium spurium Hirn. Fig.275. Oedogonium Reinschii Roy. Fig. 276. O0edogonium tapeinosporum Wittr. Fig. 277. Oedogonium sancti-thomae Wittr. & Cleve. Fig. 278. Oedogonium Gunnii Wittr. Fig.279. Oedogonium psaegmatosporum Nordst. Figs. 280-282. Oedogonium mammiferum Wittr. Figs. 283,284. Oedogonium Itzigsohnii De Bary. Fig. 285. Oedogonium acmandrium Elfv. Fig. 286. Oedogonium poecilosporum Nordst. & Hirn. Fig. 287. Ocedogonium pusillum Kirchner. Figs. 288,289. Oedogonium inconspicuum Hirn. (Figs. 268, 269 after Jao; 279, 283-286 redrawn from Hirn.) NORTH AMERICAN FLORA VOLUME 11, PLATE 19 EE——$-—~~“W _ iy OEDOGONIUM Figs. 290, 291. Figs. 292, 293. Figs. 294-296. Figs. 297-299. Figs. 300-302. PLATE 20 Oedogonium Howardii G. West. Figs. 303, 304. Oedogonium ouchitanum Tait. Oedogonium latiusculum Tiff. Fig. 305. Oedogonium bohemicum Hirn. Oedogonium infimum Tiff. Figs. 306, 307. Oedogonium capitellatum Wittr. Oedogonium Howei Tiff. Figs. 308-311. Oedogonium inversum Wittr. Ocedogonium Brittonii Tiff. (Figs. 291 redrawn from West; 303, 304, after Taft; 307 from Hirn.) PLATE 21 312, 3133. Cramer. Figs. 314-317. Oedogonium Pringsheimii var. Nordstedtii Wittr. Fig. 318. Oedogonium abbreviatum (Hirn) Tiff. Figs. 319, 320. Oedogonium epiphyticum Tran- seau & Tiff. Figs. 321, 322. Oedogonium porrectum Nordst. & Hirn. Figs. Oedogonium Pringsheimii Figs. 323, 324. Oedogonium pisanum Wittr. Figs. 325, 326. Oedogonium pratense Transeau. Fig. 327. Oedogonium loricatum Hirn. Fig. oe Oedogonium amplius (W. R. Taylor) iff. Figs. 329, 330. QOedogonium Hallasice Tiff. Figs. 331-333. Oedogonium iowense Tiff. Figs. 334, 335. Oedogonium Welwitschii W. & G, West. (Figs. 321-324, 327 redrawn from Hirn; 330 after Taft.) NORTH AMERICAN FLORA VOLUME 11, PLATE 21 OEDOGONIUM PLATE 22 Figs. 336, 337. Wittr. 7 Fig. 338. Oedogonium crispum_var. gracilescens Wittr. Fig. 339. Oedogonium crispum var. uruguayense Magnus & Wille. Oedogonium crispum (Hassall) Fig. 340. Ocedogonium crispum var. granulosum Nordst. Fig. 341. Oedogonium crispum {. inflatum Hirn. Fig. 342. Oedogonium crispum var. hawaiense ; Nordst. Fig. 343. Oedogonium oblongum Wittr. Fig. 344. Oedogonium oblongum , var. majus Nordst. Figs. 345, 346. Oedogonium nanum Wittr. Fig. 347. Oedogonium oblongellum Kirchner. Fig. 348. Oedogonium rupestre Hirn. Fig. 349. Ocedogonium pyriforme Wittr. Fig. 350. Oedogonium Pithophorae Wittr. Figs. 351, 352. O¢edogonium obesum (Wittr.) Hirn. Figs. 353. Oedogonium gracillimum Wittr. & Lundell, Fig. 354. Oedogonium autumnale Wittr. Fig. 355. Ocedogonium Ahlstrandii Wittr. Figs. 356-358. Oedogonium elegans var. ameri- canum Jao. (Figs. 338, 339, 341, 342, 344, 348-350, 354, 355 redrawn from Hirn; 347 after West; 356-358 after Jao.) NORTH AMERICAN FLORA VOLUME If, PLATE 22 2 s 2 fa 8 = 2 8 OEDOGONIUM PLATE 23 Figs. 359, 360. Oedogonium pachydermum Wittr. Figs. 366,367. Oedogonium spirostriatum Tiff. & Lundell. Fig. 368. Oedogonium minus Wittr. Figs. 361, 362. Oedogonium pluviale Nordst. Fig. 369. Oedogonium commune (Hirn) Tiff. Fig. 363. Oedogonium fonticola A. Br. Figs. 370, 371. Ocedogonium nodulosum Wittr. Figs. 364, 365. Ocedogonium punctatostricium De Bary. (Figs. 359-365, 369-371 redrawn from Hirn.) NORTH AMERICAN FLORA VOLUME 11, PLATE 23 MOC, OE 50 MICRONS OEDOGONIUM PLATE 24 Fig. 372. Oedogonium sinuatum Transeau. Fig. 373. Oedogonium undulatum (Bréb.) A. Br. Fig. 374. Oedogonium undulatum {. senegalense (Nordst.) Hirn. Fig. 375. Ocedogonium rugulosum Nordst. Figs. 376, 377. Oedogonium rugulosum var. rotundatum (Hirn) Tiff. Fig. 378. Oedogonium rugulosum var. minuium (Hansg.) Tiff. Fig. 379. Oedogonium longatum Kiitz. Fig.380. Oedogonium Rothii (Le Clerc) Pringsh. Figs. oe Oedogonium senegalense (Nordst.) iff. Fig. 383. Oedogonium decipiens Wittr. Figs. 384, 385. Oedogonium decipiens var. dis- simile (Hirn) Tiff. Fig. obo. Delokonnin decipiens var. africanum iff. Fig. 387. Oedogonium Ackleyae Tiff. Figs. 388, 389. Oedogonium longicolle Nordst. Fig. 390. Oedogonium Schmidlei Gutw. Figs. 391, 392. Oedogonium macrospermum W. & G. West. (Figs. 373, 386 redrawn from Hirn; 380 from Pringsheim; 383 from Wittrock; 388, 389 from Nordstedt; 390 from Gutwinski.) PLATE 25 Figs. 393, 394. Oedogonium monile Berk. & Harv. Fig.395. Oedogonium ciliatum (Hassall) Pringsh. Fig. 396. Oedogonium macrandrium Wittr. Fig. 397. Oedogonium macrandrium var. aemu- lans Hirn. Figs. 398-400. Oedogonium macrandrium var. Hohenackerii (Wittr.) Tiff. Fig. 401. Oedogonium macrandrium var. propin- quum (Wittr.) Hirn. Fig. 402. Oedogonium macrandrium f. lundense (Wittr.) Hirn. Fig. 403. Oedogonium laetevirens Wittr. Figs. oe Oedogonium completum (Hirn) iff. Fig. 407. Oedogonium clavatum Hallas. Fig. 408. Oedogonium obtruncatum Wittr. Fig. 409. Oedogonium obiruncatum var. ellip- soideum Wittr. (Figs. 393, 394, 397, 402, 404, 405, 409 redrawn from Hirn.) PLATE 26 Fig. 410. Oedogonium acrosporum De Bary. Fig. 414. Oedogonium acrosporum var. boreale Fig. 411. Oedogonium acrosporum var. bathmi- Wolle. dosporum (Nordst.) Hirn. Fig. 415. Oedogonium tentoriale Nordst. & Hirn. Fig. 412. Oedogonium acrosporum var. majuscu- Figs. 416-419. Oedogonium Croasdaleae Jao. lum Nordst. (Fig. 418, section through oospore.) Fig. 413. Oedogonium acrosporum var. floridense Wolle. (Figs. 411, 412 redrawn from Hirn; 413 from Wolle; 416-419 after Jao.) NORTH AMERICAN FLORA VOLUM E11, PLATE 26 410 412 : OEDOGONIUM PLATE 27 Fig. 420. Oedogonium contortum Hallas. Figs. 421-423. Oedogonium spectabile Hirn. Fig. 424. Oedogonium Areschougii Wittr. Figs. 425-427. Ocedogonium Areschougii var. contortiflum Jao. Figs. 428,429. O¢edogonium subplenum Tiff. Figs. 430, 431. Oedogonium pseudoplenum Tiff. Figs. 432. Oedogonium platygynum Wittr. (a, section through oogonium.) Fig. 433. Oedogonium costatum Transeau. Fig. 434. Oedogonium oelandicum Wittr. Figs. 435-437. Oedogonium oelandicum var. novae-angliae Jao. Figs. 438, 439. Oedogonium circinatum Tiff. (a, median section through oogonium and oospore.) (Figs. 420 redrawn from Hallas; 421-423, 430, 431 from Hirn; 424 from Wittrock; 425-427, 435-437 after Jao.) NORTH AMERICAN FLORA VOLUME 11, PLATE 27 OEDOGONIUM PLATE 28 Fig. 440. Oedogonium ambiceps (Jao) Tiff. (a, Fig. 448. O¢edogonium confertum Hirn. median section through oospore and Figs. 449, 450. Oedogonium hians Nordst. & oogonium.) Hirn. Figs. 441, 442. Ocedogonium megaporum Wittr. Figs. 451, 452. Oedogonium wabashense Tiff. Figs. 443-445. Oedogonium Jaoii Tiff. Fig. 453. Oedogonium brasiliense Borge. Figs. 446, 447. Oedogonium rigidum Hirn. Figs. 454-456. Oedogonium Taftii Tiff. (Figs. 440, 443-445 after Jao; 454-456 after Taft; 446-450, 453 redrawn from Hirn.) PLATE 28 VOLUME 11, NORTH AMERICAN FLORA OEDOGONIUM PLATE 29 Figs. 457,458. Oedogonium michiganense Tiff. Figs. 464-467. Oedogonium supremum Tiff. Figs. 459, 460. Oedogonium Collinsii Tiff. Figs. 461-463. Ocedogonium praticolum Tran- seau. (Figs, 459, 460 after Jao.) PiLaTE 30 Figs. 468-470. Oedogonium nebraskense Ohashi. Figs. 481, 482. Oedogonium hystricinum Tran- Figs. 471-473. Ocedogonium Huntii H.C. Wood. seau & Tiff. Figs. 474-476. Oedogonium fuscum Taft. Figs. 483, 484. Oedogonium pungens Hirn. Fig. 477. Oedogonium hispidum Nordst. Fig. 485. Oedogonium armigerum Hirn. Fig. 478. Oedogonium canadense (Tiff.) Tiff. Fig. 486. Oedogonium Aster Wittr. Figs. See 480. Oedogonium excentriporum (Jao) iff. ee 477, 483-486 redrawn from Hirn; 471-473 from Wood; 474-476 after Taft; 479, 480 after Jao. VOLUME 11, PLATE 30 NORTH AMERICAN FLORA I *) 50 MICRONS 468 471 OEDOGONIUM PuaTE 31 Fig. 487. Oedogonium echinospermum A. Br. Figs. 494-496. Ocedogonium illinoiense Tran- Fig. 488. Oedogonium echinospermum var. hor- seau. vidum Hirn. Figs. 497-499. Ocedogonium illinoiense var. Fig. 489. Oedogonium hystrix Wittr. oklahomense Taft. Figs. 490-492. Oedogonium spirale Hirn. Fig. 500. Oedogonium latviense (Tiff.) Tiff. Fig. ee Oedogonium acutum (W. & G. West) Figs. 501-503. Oedogonium exospirale Tiff. iff. (Figs. 488 after Wolle; 489 from Wittrock; 490-492 from Hirn; 497-499 after Taft.) Fig. 504. Fig. 505. Fig. 506. Fig. 507. Fig. 508 Oedogonium spiripennatum Jao. Oedogonium Braunii Kitz. Oedogonium Zehneri (‘Tiff.) Tiff. Oedogoninum depressum Pringsh. Oedogonium subsexangulare Tiff. Figs. 509-510. Figs. 511 » 512, PLATE 32 Fig. 513. Oedogonium magnum (Ackley) Tiff. Fig. 514. Ocedogonium sexangulare Cleve. Fig. 515. Oedogonium echinatum (H. C. Wood) Wittr. Fig. 516. O¢edogonium gallicum Hirn, Oedogonium angulosum Hallas. Fig.517. Oedogonium flavescens (Hassall) Wittr. Oedogonium gallicum Hirn. (Figs. 504 after Jao; 507, 508, 511, 512 redrawn from Hirn; 509 from Hallas; 515 from Wood; 516 after Taft.) PLaTE 33 Fig. 518. Oedogonium silvaticum Hallas. Figs. 525, 526. Oe¢dogonium idioandrosporum Figs. 519, 520. Ocedogonium multisporum H. C. var. minus Tiff. Wood. Fig. 527. Oedogonium Borisianum (Le Clerc) Fig. 521. Oedogonium irregulare Wittr. Wittr. Fig. 522. Oedogonium irregulare var. condensa- Fig.528. Oedogonium Westii Tiff. & Br. tum (Hallas) Hirn. Figs. 523, 524. Oedogonium idioandrosporum (Nordst. & Wittr.) Tiff. (Figs. 518, 522 redrawn from Hallas.) NORTH AMERICAN FLORA VOLUME 11, PL . , ATE 33 OEDOGONIUM PLATE 34 Figs. 529-531. Oedogonium Taylorii Jao. Fig Fig. 532. Oedogonium crassiusculum Wittr. Fig Fig. 533. Oedogonium crassiusculum var. Are- Fig chavaletae (Wittr.) Hirn. Fig Fig. 534. Ocdogonium crassiusculum var. cata- ractum (Wolle) Tiff. (Figs. 529-531 after Jao; 535 redrawn from West; ig. 535. Oedogonium victoriense G. West. ig. 536. Ocedogonium siellatum Wittr. ig. 537. Oedogonium Donnellii Wolle. . 538. Oedogonium concatenatum (Hassall) Wittr. 536, 537 from Hirn.) NORTH AMERICAN FLORA VOLUME 11, PLATE 34 532 580 50 MICROKS 536 OEDOGONIUM PLATE 35 Fig. 539. Oedogonium concatenatum var. Hut- Figs. 544-546. Ocedogonium cyathigerum f. chinsiae (Wittr.) Tiff. ornatum (Wittr.) Hirn. : Fig. 540. Oedogonium concatenatum var. regu- Figs. 547, 548. Oedogonium perfectum (Hirn) lare Taft. Tiff. Figs. 541,542. Ocedogonium cyathigerum Wittr. Fig. 543. Oedogonium cyathigerum var. ellipti- cum Magnus & Wille. (Figs. 540 after Taft; 543-548 redrawn from Hirn.) NORTH AMERICAN FLORA VOLUME 11, PL . ATE 35 CEDOGONIUM PLATE 36 Figs. 549, 550. Oedogonium Wolleanum Wittr. Fig. 557. Iwo views of oospore of Oe. spiripen- Fig. 551. O0edogonium Wolleanum var. concin- natum Jao. num Hirn, Fig. 558. Oospore of Oe. areoliferum (Jao) Fig. 552, 553. Oedogonium striatum ‘Tiff. iff. Fig. 554. Bulbochaete spinosa Wailes. Fig. 559. Oospore of Oe. Taylorii Jao. Figs. 555, 556. Two views of oospore of Oe. reticulocostatum Jao. (Figs. 549-553 redrawn from Hirn; 554 from Wailes; 555-559 after Jao, on larger scale.) NORTH AMERICAN FLORA VOLUME 11, PLATE 36 y SUH LETT Me mera7i77 | 50 MICRONS OEDOGONIUM, BULBOCHAETE BIBLIOGRAPHY: VOLUME 11, PART 1 (OEDOGONIALES) By Joun HENDLEY BARNHART Ackley, Alma Bernice, 1893— (Ackley). Trans. Am. Micr. Soc. 48: 302-309. “ pl. 35, 36” [on 307, 309]. 40 1929.—New species and varieties of Michigan algae. Agardh, Carl Adolf, 1785-1859 (Ag.). Syn. Alg. i-xl. 1-135. 1817.—Synopsis algarum Scandinaviae. Archer, William, 1830-1897 (Archer). Quart. Jour. Mier. Sci. II. 6: 121-123. 1866.—[A new species of Bulbochaete.] Areschoug, John Erhard, 1811-1887 (Aresch.). Algae Scand. Exs. II. 1-430. 1861-79.—Algae scandinavicae exsiccatae. Series nova. 1-50. 1861. 201-250. 1864. 301-400. 1872. 51-200. 1862. 251-300. 1866. 401-430. 1879. Auerswald, Bernhard, 1818-1870 (Auersw.). Bary, Heinrich Anton de, 1831-1888 (DeBary). Abh. Senck. Nat. Ges. 1: 29-105. pl. 2-4. [S] 1854.—Ueber die Algengattungen Oedo- gonium und Bulbochaete. Ber. Verh. Nat. Ges. Freiburg 1: 215-229. pl. 5. Je 1856.—Ueber den geschlechtlichen Zeugungsprozess bei den Algen. Berkeley, Miles Joseph, 1803-1889; Harvey, William Henry, 1811-1866 (Berk. & Harv.). Borge, Oskar Fredrik Andersson, 1862— (Borge). Bih. Sv. Vet.-Akad. Handl. 2412: 1-33. pl. 1, 2. 1899.—Ueber tropische und subtropische Stisswasser-Chlorophyceen. Bih. Sv. Vet.-Akad. Handl. 2719: 1-40. pl. 1, 2. 1901.—Siisswasseralgen aus Siid- Patagonien. Borge, Oskar Fredrik Andersson, 1862—__; Hirn, Karl Engelbrecht, 1872-1907 (Borge & Hirn). Braun, Alexander Carl Heinrich, 1805-1877 (A. Br.). Abh. Akad. Berlin 1855: 21-83. pl. 1-5. 1855.—Ueber Chytridium, eine Gattung einzel- liger Schmarotzergewachse auf Algen und Infusorien. Brébisson, Louis Alphonse de, 1798-1872 (Bréb.). Britton, Max Edwin, 1912— ; Smith, Benjamin Harrison, 1892- (Britton & Smith). Proc. Ind. Acad. 44: 65-68. 1935.—Further studies of Indiana algae. Carter, Henry John, 1813-1895 (Carter). Ann. Mag. Nat. Hist. III. 1; 29-39. pl. 3. Ja 1858.—On specific character, fecundation and abnormal development in Oedogonium. Chmielewsky, Vincent Ferdinandowitsch, 1860— (Chmiel.). Trudy Obshch. Ispyt. Prir. Khark. 23: 167-171. pl. 1890.—[Two new species of algae.] Cleve, Per Theodor, 1840-1905 (Cleve). Collins, Frank Shipley, 1848-1920 (Collins). Rhodora 20: 141-143. o/. 124, f. 1-5. 1 Au 1918—Notes from the Woods Hole laboratory —1917. I. Species new to science or to the region. VoLUME 11, Part 1, 1937] 87 88 NORTH AMERICAN FLORA (VoLume 11 Tufts Coll. Stud. 3: 69-109. pl. 1, 2. Ap 1912.—The green algae of North America, sup- plementary paper. Tufts Coll. Stud. 47: 1-106. pl. 1-3. 1 Je 1918.—The green algae of North America, second supplementary paper. Collins, Frank Shipley, 1848-1920; Hervey, Alpheus Baker, 1839-1931 (Collins & Hervey). Proc. Am. Acad. 53: 1-195. “ pl. 1-6” [on 173, 175, 177, 179, 181, 183]. Au 1917.—The algae of Bermuda. Collins, Frank Shipley, 1848-1920; Holden, Isaac, 1832-1903; Setchell, William Albert, 1864— (C.H.S.). Phyc. Bor. Am. 1-2300. i-cxxv. 1895-1919.—Phvycotheca boreali-americana. I-50. F 1895. 851-900. N 1901. 1751-1800. D 1911, 51-100. Mr 1895. 901-950. S$ 1902. 1801-1850. F 1912. 101-150. 3S 1895. 951-1000. O 1902. 1851-1900. D 1912. 151-200. Mr 1896. 1001-1050. My 1903. 1901-1950. N 1913. 201-250. S 1896. 1051-1150. S 1903. 1951-2000. Ji 1914. 251-300. Ja 1897. 1151-1200. O 1904. 2001-2050. Mr 1915. 301-350. Au 1897. 1201-1250. Ja 1905. 2051-2100. Mr 1916. 351-400. N 1897. 1251-1300. N 1905. 2101-2150. Au 1916. 401-450. My 1898. 1301-1350. D 1906. 2151-2250. Je 1917. 451-500. Au 1898. 1351-1400. Mr 1907. 2251-2300. $ 1919. 501-550. D 1898. 1401-1450. D 1907. 4-24K0. JI 1899, 551-600. Ap 1899. 1451-1500. My 1908. xvi, Mr 1901. 601-650. N 1899. 1501-1550. N 1908. li-lexv. Je 1902. 651-700. Ap 1900. 1551-1600. O 1909. lxxvi—c, S 1905. 701-750. Ji 1900. 1601-1650. Ap 1910. ci-cxxy, Ja 1911. 751-800. D 1900. 1651-1700. N 1910. 801-850. Ji 1901. 1701-1750. My 1911. Cooke, Mordecai Cubitt, 1825-1914 (Cooke). Brit. Fresh-w. Algae 1-329. pl. 1-130. 1882-84.—British fresh-water algae. Exclusive of Desmideae and Diatomaceae. 1-110. pl. 1-44. 1882. 111-198. pl. 45-80. 1883. 199-329. pl. 81-130. 1884. Cramer, Carl Eduard, 1831-1901 (Cramer). Hedwigia 2: 17-19. pl]. 1, f.C. 1859—Oedogonium Pringsheimii Cramer. De Bary: see Bary. De Notaris, Giuseppe, 1805-1877 (De-Not.). Erb. Critt. Ital. II. 29. 1868.—Oedogonium ciliare DNtris. Description reprinted, Hedwigia 7: 120. 1868. Desmaziéres, Jean Baptiste Henri Joseph, 1786-1862 (Desmaz.). Pl. Crypt. 14-2200. 1825-51.—Plantes cryptogames de France. Nos. /-800 under the title: Plantes cryptogames du nord de la France. I-50. 1825. 651-750. 1834. 1351-1450. 1845. 51-150. 1826. 751-850. 1836. 1451-1550. 1846. 151-250. 1827. 851-900. 1837. 1551-1650. 1847. 251-350. 1828. 901-950. 1838. 1651-1750. 1848, 351-450. 1829. 951-1050. 1839. 1751-1950. 1849. 451-500. 1830. 1051-1100. 1840. 1951-2100. 1850. 501-550. 1831. 1101-1150. 1841. 2101-2200. 1851. 551-600. 1832. 1131-1250. 1842. 601-650. 1833. 1251-1350. 1843. Eichler, Bogumir, 1843-1905 (B. Eichler). Pam. Fizyjogr. 123: 157-169. pl. 9, 10. 12 Jl 1893.—Materyaly do flory wodorostéw okolic Miedzyrzeca. {Matériaux pour la flore algologique des environs de Miedzyrzec.] Part 1, 1937] BIBLIOGRAPHY 89 Elfving, Fredrik Emil Volmar, 1854— (Elfy.). Filarszky, Nandor, 1858- (Filar.). Math. Term. Kézlem. 27: 721-800. 1901.—Adatok a Pienenek moszatvegetatiéjahoz. Fiorini-Mazzanti, Elisabetta, 1799-1879 (Fior.-Mazz.). Atti Accad. Nuovi Lincei 13: 259, 260. 1860.—De novis microphyceis. Grunow, Albert, 1826-1914 (Grun.). Gutwifiski, Roman, 1860-1932 (Gutw.). Nuova Notar. 8: 125-136. N 1897,—Materyaly do flory glonéw Galicyi. Res ad floram algarum Galiciae congesti. Rozp. Akad. Umiej. II. 13: 33-63. pl. 5-7. 1898.—De nonntullis algis novis vel minus cognitis. Hallas, Emma Dorothea Kathinka Helene, 1849-1926 (Hallas). Bot. Tidssk. 26: 397-410. Je 1905.—Nye Arter af Oedogonium fra Danmark. Hansgirg, Anton, 1854~1917 (Hansg.) Arch. Nat. Land. Béhmen 5: 1-96. 1886.—Prodromus der Algenflora von Béhmen. Erster Theil. I. Heft. Arch. Nat. Land. Bohmen 6°: 97-290. 1888.—Prodromus der Algenflora von Béhmen. Erster Theil. II. Heft. Beih. Bot. Centr. 18?: 417-522. 1905.—Grundaztige der Algenflora von Niederésterreich. Sitz.-ber. Béhm. Ges. Wiss. 1891: 297-365. 1891.—Algologische und_bacteriologische Mittheilungen. Hantzsch, Carl August, 1825-1886 (Hantzsch). Hardy, Alfred Douglas (A. D. Hardy). Viet. Nat. 23: 18-22. 10 My 1906.—The fresh-water algae of Victoria. Part III. Harvey, William Henry, 1811-1866 (Harv.) In Hook. f. Fl. Tasm. 2: 282-320. 16 Au; 321-343 pl. 185-196. 29 D 1859.—Algae. Hassall, Arthur Hill, 1817-1894 (Hassall). Ann. Mag. Nat. Hist. 10: 385-395. Ja 1843.—Observations on a new group, genus and subgenus, of freshwater Confervae, with descriptions of species mostly new. (Con- cluded.) Ann. Mag. Nat. Hist. 11: 428-437. Je 1843.—Descriptions of British freshwater Con- fervae, mostly new, with observations on some of the genera. Hist. Brit. Freshw. Algae 1: 1-462. 2: 1-24. pl. 1-103. 1845.—A history of the British freshwater Algae. Heering, Wilhelm, 1876-1916 (Heering). In Pascher, Siissw.-fl. Deutschl. 6: 156-244. 1914.—Oedogoniales. Hirn, Karl Engelbrecht, 1872-1907 (Hirn). Acta Soc. Faun. FI. Fenn. 116: 1-24. pl. 1895.—Verzeichnis finnlandischer Oedogoniacéen. Acta Soc. Sci. Fenn. 27: 1-395. pl. 1-64. 1900.—Monographie und Iconographie der Oedogoniaceen. Acta Soc. Sci. Fenn. 343: 1-63. pl. 1-4. 1906.—Studien tiber Oedogoniaceen. I. Eine kritische Zusammenstellung der Untersuchungen und Beobachtungen, die in den Jahren 1901-1905 iiber Oedogoniaceen gemacht worden sind. Erythea 6:21. 17 Mr 1898.—A new Oedogonium from California. Oefv. Finska Vet.-Soc. Férh. 38: 18-25. 1896.—Algologische Notizen. Hooker, Joseph Dalton, 1817-1911 (Hook. f.). FL Tasm. 1855-59.—The botany of the antarctic voyage. Part III. Flora Tasmaniae. 1 1-80. pl. 1-20. 24 O 1855. 2: 1-80. pl. 101-120. 3 My 1858. 1: 81-160. pi. 21-40. 13 My 1856. 81-160. pl. 121-140. 3S 1858. 1: 161-240. pl. 41-60. 17 O 1856. : 161-240. pl. 141-160. 15 F 1859. 1; 241-320. pl. 61-80. 28 Jl 1857. : 241-320. pl. 161-180. 16 Au 1859. 1 : 321-359. pl. 81-100. 1 D 1857. : 321-422. pl. 181-200. 29 D 1859. 4-CXKUET. 29 D 1859. NNN WY 90 NORTH AMERICAN FLORA [Volume 1] Istvanffi de Csik Madéfalva, Gyula von, 1860-1930 (Istv.). Term. Fiiz. 13: 67-77, 1 D 1890.—Ruméliae Algdk, Frivaldszky Imre gyiijtésébal. Algae nonnullae a beato EK. Frivaldszky in Rumelia lectae. Jao, Chin Chih, 1900— (Jao). Papers Mich. Acad. 19: 83-92. pl. 5-7. Mr 1934.—New Oedogonia collected in China. Papers Mich. Acad. 20: 57-63. pl. 10, 11. My 1935.—New Oedogonia collected in China. II. Rhodora 36: 197-214. pl. 286-288. 1 Je 1934.—Oedogonium in the vicinity of Woods Hole, Massachusetts. Rhodora 38: 67-73. pl. 407. 3 F 1936.—Notes on Oedogonium and Bulbochaete in the vicinity of Woods Hole, Massachusetts. Juranyi, Lajos, 1837-1897 (Juranyi). Jahrb. Wiss. Bot. 9: 1-35. pl. 1-3. [O] 1873.—Beitrag zur Morphologie der Oedogonien. Kirchner, Emil Otto Oskar von, 1851-1925 (Kirchn.). Krypt.-Fl. Schles. 2!: 1-284. 1878.—Algen. Knapp, Edgar (E. Knapp). Ber. Deuts. Bot. Ges. 51: 40-43. pl. 2. 23 F 1933.—Ein neues Oedocladium aus Nord- Amerika (Oed. Wettsteinii). Kiitzing, Friedrich Traugott, 1807-1893 (Kititz.). Phyc. Gen. 1~458. #1. 1-80. 1843.—Phycologia generalis oder Anatomie, Physiologie und Systemkunde der Tange. Phye. Germ, 1-340. 1845.—Phycologia germanica, d. i. Deutschlands Algen. Sp. Alg. 1-922. 1849.—Species algarum. Tab. Phyc. 1846-71.—Tabulae phycologicae oder Abbildungen der Tange. 1: 1-16. pl. 1-20. 1846. 9: 1-42. pl. 1-100. 1859. 1: 17-36. pl. 21-50. 1847. 10: 1-39. pl. 1-100. * 1860. 1: 37-54. pl. 51-100. 1849. 11: 1-32. pl. 1-100. 1861. 2: 1-8. ph 1-30. 1850. 12: 1-30. pl. 1-100. 1862. 2: 9-16. pl. 31-50. 1851. 13: 1-31. pl. 1-100. 1863. 2: 17-37. pl. 51-100. 1852. 14: 1-35. pl. 1-100. 1864. 3: 1-28. pl. 1-100. 1853. 15: 1-36. pl. 1-100. 1865. 4: 1-23. pl. 1-100. 1854. 16: 1-35. pl. 1-100. 1866. 5: 1-30. pl. 1-100. 1855. 17: 1-30. pl. 1-100. 1867. 6: 1-35. pl. 1-100. 1856. 18: 1-35. pl. 1-100. 1868. 7: 1-40. pl. 1-100. 1857. 19: 1-36. pl. 1-100. 1869. 8: 1-48. pl. 1-100. 1858. Index 1-57. 1871. Lagerheim, Nils Gustaf, 1860-1926 (Lagerh.). Anal. Univ. Ecuador 47: 81. 1890.—Contribuciones a la flora algologica del Ecuador. Nuova Notar. 4: 153-166. 2 Ja 1893.—Chlorophyceen aus Abessinien und Kordofan. Le Clerc, Léon (Le Clerc). Mém. Mus. Paris 3: 462-478. pl. 23. 1817.—Sur la fructification du genre Prolifére de M. Vaucher. Lemmermann, Ernst Johann, 1867-1915 (Lemmerm.). Abh. Nat. Ver. Bremen 12: 497-550. Mr 1893.—Versuch einer Algenflora der Umgegend von Bremen (excl. Diatomaceen). Arch. Hydrobiol. 4: 165-192. pl. 5. 1909.—Algologische Beitrage. Forsch. Biol. Sta. Plén 3: 18-67. 1895.—Verzeichnis der in der Umgegend von Ploen ge- sammelten Algen. Lewin, Maria, 1859- (Lewin). Bih. Sv. Vet-Akad. Handl. 141: 1-24. pl. 1-3. 1888.—Ueber Spanische Siisswasseralgen, Lewis, Ivey Foreman, 1882— (I. F. Lewis). Link, Johann Heinrich Friedrich, 1767-1851 (Link). Horae Phys. Berol. 1-8. pl. J. 1820—Epistola ..de Algis aquaticis in genera disponendis. Part 1, 1937] BIBLIOGRAPHY 91 Linnaeus, Carl, 1707-1778 (L.). Sp. Pl. 1-1200. 1753.—Species plantarum. Love, Louise M., 1903— ; Rogers, Robert Leroy, 1908- (Love & Rogers). Proe. Ind. Acad. 42: 79-81. 1933.—Some algae of Vigo, Greene and Daviess counties. Lundell, Peter Magnus, 1841- (Lundell). Magnus, Paul Wilhelm, 1844-1914; Wille, Johan Nordal Fischer, 1858-1924 (Magnus & Wille). Mébius, Martin August Johannes, 1859- (Mdbius). Abh. Senck. Nat. Ges. 18: 309-350. pl. 1,2. [0] 1894.—-Australische Stisswasseralgen. IT. Mougeot, Joseph Antoine, 1815-1889; Roumeguére, Casimir, 1828-1892 (Moug. & Roum.). Alg. Fr. 1-1200. 1883-89.—Les Algues des eaux douce de France. Nos. 1-300 with collaboration of Manoury (Charles Ambroise); nos. 301-1200 with that of Dupray (Lucien). 1-200. 1883. 601-800. 1886. 1001-1100. 1888? 201-400. 1884. 801-1000. 1887. 1101-1200. 1889. 401-600. 1885. Continued as: Roum. & Dupray, Alg. Fr. Nordstedt, Carl Fredrik Otto, 1838-1924 (Nordst.). Acta Univ. Lund. 164: 1-20. pl. 1. [15 N] 1880.—De Algis et Characeis. Bot. Notiser 1878: 176-180. pi. 2. 16 D 1878.—Algologiska smasaker. I. Minnesskr. Fys. Sallsk. Lund 7: 1-24. pl. 1, 2. 1878.—De Algis aquae dulcis et de Char- aceis ex insulis sandvicensibus a Sv. Berggren 1875 reportatis. Oefv. Sv. Vet.-Akad. Férh. 344: 21-33. pi. 3. 1877.—Bohuslans Oedogonieer. Sv. Vet.-Akad. Handl. IT. 228: 1-98. pl. 1-7. 1888.—Fresh-water algae collected by D:r S. Berggren in New Zealand and Australia. Nordstedt, Carl Fredrik Otto, 1838-1924; Hirn, Karl Engelbrecht, 1872-1907 (Nordst. & Hirn). Ohashi, Hiro, 1882— (Ohashi). Bot. Gaz. 82: 207-214. 28 0 1926.—Oedogonium nebraskensis [sic!], sp. nov. Pascher, Adolf, 1881- (Pascher). Siissw.-fl. Deutsch]. 1913-36.—Die Siisswasser-flora Deutschlands, Oesterreichs und der Schweiz. 3: 1-66. 1913. 1: 1-138. 1914. 12: 1-481. 1925. 9: 1-51. 1913. 6: 1-250. 1914. 4: 1-506. 1927. 10: 1-187. 1913. 5: 1-250. 1915. 14: ed. 2. 1-252. 1931. 2: 1-192. 1913. 7: 1-103. 1921. 9: ed. 2. 1-232. 1932. 14: 1-222. 1914, 11: 1-250. 1925. 15: 1-486. 1936. Petrovsky, Andrei Stanislavovié, 1832-1882 (Petrovsky). ; Bull. Soc. Nat. Mosc. 341: 605-618. pl. 13. Jl 1861.—Etudes algologiques. Pringsheim, Nathanael, 1823-1894 (Pringsh.). Ber. Akad. Berlin 1856: 225-237. pl. [Je] 1856.—Ueber die Befruchtung und den Genera- tionswechsel der Algen. : Jahrb. Wiss. Bot. 1: 1-81. pl. 1-6. 1857.—Beitrage zur Morphologie und Systematik der Algen. Rabenhorst, Gottlob Ludwig, 1806-1881 (Rab.). Alg. Eur. 1001-2590. 1861-79.—Die Algen Europa’s (mit Beriicksichtigung des ganzen Erdballs). Continuation of Rab. Alg. Sachs. /-1000. 1001-1240. 1861. 2041-2060. 1868. 2391-2430. 1875. 1241-1400. 1862. 2061-2140. 1869. 2431-2480. 1876. 1401-1600. 1863. 2141-2240. 1870. 2481-2520. 1877. 1601-1730. 1864. 2241-2260. 1871. 2521-2570. 1878. 1731-1820. 1865. 2261-2310. 1872. 2571-2590. 1879. 1821-1910. 1866. 2311-2350. 1873. 1911-2040. 1867. 2351-2390. 1874. 92 NORTH AMERICAN FLORA [VOLUME 11 Alg. Sachs. 1-1000. 1849-60.—Die Algen Sachsen’s (respective Mittel-Europa’s). 1-30. 1849. 261-340. 1853. 561-660. 1857. 31-70. 1850. 341-400. 1854. 661-780. 1858. 71-140. 1851. 401-480. 1855. 781-900. 1859. 141-260. 1852. 481-560. 1856. 901-1000. 1860. Continued as Rab. Alg. Eur. Fl. Eur. Alg. 1864-68.—Flora europaea algarum aquae dulcis et submarinae. 1: 1-359. 1864. 2: 1-319. 1865. 3: 1-461. 1868. (3: 1-320 issued earlier than 3: 321-461, but all in same year.) Reinsch, Paul Friedrich, 1836-1914 (Reinsch). Contr. Alg. Fung. 1: i-xii. 1-104. Melanoph. pl. 1-3, 3a, 4-6, 6a, 7-12, 12a, 13-20, 20a, 21-35, 35a, 36. Rhodoph. pl. 1-42, 42a, 43-47, 47a, 48-61. Chloroph. pl. 1-18. Fungi pl. 1-9. 1875.—Contributiones ad algologiam et fungologiam. No more published. Some copies dated ‘ 1874-1875 ”’ (date of printing?). Roth, Albrecht Wilhelm, 1757-1834 (Roth). Catalecta Bot. 1797-1806.—Catalecta botanica. 1: 1-244. pl. 1-8. 1797. 3: 1-350. pl. 1-12. 1806. 2: 1-260. pl. 1-9. 1800. Roy, John, 1826-1893 (Roy). Schaarschmidt [Istvanffij, Julius, 1860-1930 (Schaars.). Jour. Linn. Soc. 21: 241-250. pl. 5. 18 Au 1884.—Notes on Afghanistan algae. Schmidle, Wilhelm, 1860— (Schmidle). Flora 78: 42-66. pl. 7. 24 Ja 1894.—Aus der Chlorophyceen-Flora der Torfstiche zu Virnheim. Flora 82: 297-313. pl. 9. 4 Jl 1896.—Siisswasseralgen aus Australien. Hedwigia 40: 343-349. pl. 12. 30 D 1901.—Einige Algen, welche Prof. Dr. Volkens auf den Carolinen gesammelt hat. Schréder, Julius Ludwig Bruno, 1867— (Schréder). Forsch. Biol. Sta. Plén 5: 29-66.'pl. 2-4. 1897.—Die Algen der Versuchsteiche des Schles. Fischereivereins zu Trachenberg. Skuja, Heinrichs, 1892— (Skuja). Acta Horti Univ. Latv. 2: 51-116. pl. 1, 2. 24 D 1927.Vorarbeiten zu einer Algenflora von Lettland. III. Acta Horti Univ. Latv. 4: 1-76. pl. 1-3. 10 Mr 1930,—Siisswasseralgen von des westest- nischen Inseln Saaremaa und Hiiumaa. Acta Horti Univ. Latv. 7: 25-86. 8 Ja 1934.—Beitrag zur Algenflora Lettlands. I. Smith, Benjamin Harrison, 1892- (B. H. Smith). Proc. Ind. Acad. 41: 177-206. 1932-—The algae of Indiana. Stahl, Christian Ernst, 1848-1919 (Stahl). Jahrb. Wiss. Bot. 23: 339-348. pl. 16, 17. 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IV. 11: 192-204. pl. 4,f Ap 1859—Sur la reproduction et la fécondation d’une espéce du genre Oedogonium. Wailes, George Herbert, 1862- (Wales). Mus. Notes Vane. 5: 92-109. S 1930.—Munday Lake and its ecology. West, George Stephen, 1876-1919 (G. West). ; : Jour. Bot. 37: 49-58. pl. 394. F 1899,—The alga-flora of Cambridgeshire. Jour. Bot, 42: 281-294. pl. 464. O 1904—West Indian freshwater algae. : Jour. Linn. Soc. 38: 81-197. pl. 2-10. 14 O 1907.—Report on the freshwater algae, in- cluding phytoplankton, of the third Tanganyika expedition conducted by Dr. W. A. Cunnington, 1904-1905. . Jour. Linn. Soc. 39: 1-88. pl. 1-6. 11 Mr 1909.—The algae of the Yan Yean Reservoir, Victoria: a biological and ecological study. West, William, 1875-1901 (W. West). . Jour. Linn. Soc. 29: 103-216. pl. 18-24. 26 Ap 1892.—A contribution to the freshwater algae of West Ireland. 94 NORTH AMERICAN FLORA [VoLuME 11 West, William, 1875-1901; West, George Stephen, 1876-1919 (W. & G. West). Jour. Bot. 35: 1-7. pl. 365-369. Ja 1897.—Welwitsch’s African freshwater algae. Jour. Bot. 41: 33-41. pl. 446-448. F 1903.—Notes on freshwater algae.—III. Jour. Roy. Mier. Soc. 1897: 467-511. pl. 6, 7. [18] D 1897.—A contribution to the fresh- water algae of the south of England. Trans. Linn. Soc. IT. 6: 123-215. pl. 17-22. Mr 1902.—A contribution to the freshwater algae of Ceylon. Whitford, Larry Alston, 1902— (L. Whitford). Jour. Elisha Mitchell Soc. 52: 93-98. pl. 12. Jl 1936.—New and little known algae from North Carolina. Wille, Johan Nordal Fischer, 1858-1924 (Wille). Bih. Sv. Vet.-Akad. Handl. 81*: 1-64. p/. 1-3. 1884.—Bidrag til Sydamerikas Algflora. Forh. Vid.-Selsk. Christiania 188011: 1-72. pl. 1, 2. 1880—Bidrag til Kundskaben om Norges Ferskvandalger. I. Smaalenenes Chlorophyllophyceer. Wittrock, Veit Brecher, 1839-1914 (Wittr.). Bih. Sv. Vet.-Akad. Handl. 11: 1-72. pl. 1-4. 1872—Om Gotlands och Olands sétvattens- alger. : Bot. Notiser 1872: 1-8. pl. 7. 15 F 1872,—Oedogoniaceae novae, in Suecia lectae. Bot. Notiser 1878: 133-145. 1 N 1878.—Oedogonieae americanae, hucusque cognitae. Nova Acta Soc. Sci. Upsal. III. 93: 1-64. pl. 1. 1874.—Prodromus monographiae Oedogoniearum. Oefv. Sv. Vet.-Akad. Férh. 27: 119-144. pl. 1. 1870.—Dispositio Oedogoniacearum sue- cicarum. Oefv. Sv. Vet.-Akad. Férh. 336: 44-56. p]. 13, f. 20-33. 1876—Oedogonieae [ab O. Nordstedt in Italia et Tyrolia collectae]. Wittrock, Veit Brecher, 1839-1914; Cleve, Per Theodor, 1840-1905 (Wittr. & Cleve). Wittrock, Veit Brecher, 1839-1914; Lundell, Peter Magnus, 1841— (Wittr. & Lundell). Wittrock, Veit Brecher, 1839-1914; Nordstedt, Carl Fredrik Otto, 1838-1924 (Wittr. & Nordst.). Algae Exsicc. 1-1612. 1877-1903.—Algae aquae dulcis exsiccatae. Nordstedt was editor of Botaniska Notiser throughout this period (1877-1903), and published lists of contents, with diagnoses of all novelties, within a few weeks after the appearance of each fascicle; hence the parenthetic citations given here. 1-100. 20 Ja 1877. (Bot. Notiser 1877: 21-26.) 101-200. 28 F 1878. (Bot. Notiser 1878: 67-73.) 201-300. 11 Ja 1879. (Bot. Notiser 1879: 20-27.) 301-400. 10 J1 1880. (Bot. Notiser 1880: 113-122.) 401-500. 10 F 1882. (Bot. Notiser 1882: 51-61.) 501-600. 25 My 1883. (Bot. Notiser 1883: 145-153.) 601-700. 7 Ji 1884. (Bot. Notiser 1884: 121-128.) 701-750. 19 Jl 1886. 751-800. 8 Je 1886. ¢ (Bot. Notiser 1886: 130-139.) 801-850. 30 Je 1886. 851-900. 19 Au 1889. 901-950. 30 Au 1889.- (Bot. Notiser 1889: 157-168.) 951-1000. 13S 1889. ties . : ene (Bot. Notiser 1893: 185-200.) 1201-1400. 30 D 1896. (Bot. Notiser 1897: 75-94.) 1401-1612. 10 My 1903. (Bot. Notiser 1903: 133-141.) 21: 1-92. 30 N 1889. (Descr. syst. fase. 1-20.) 35: 1-42. 10 Je 1903. 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Notiser—Botaniska notiser, for 4r 1839-1936—. 1839-1936—. No vols. issued for 1847, 1848, 1859-62, 1864, 1869, and 1870. Bot. Tidssk.—Botanisk Tidsskrift. Vols. 143—. 1866-1936—. Brittonia—Brittonia. Vols. 1—. 1931-35—. Bull. Soc. Nat. Mosc.—Bulletin de la Soc’eté impér ale des naturalistes Ce Moscou. Vols. 1-62. 1829-87. Bull. Torrey Club—Bulletin of the Torrey Botanical Club. Vols. 1-63—. 1870-1936—. Erb. Critt. Ital. II.—Erbario crittogamico italiano. Serie II. J-1500. 1868-85. Erythea—Erythea, a journal of botany, West American and general. Vols. 1-8. 1893-1922. Flora—Flora, oder (Allgemeine) botanische Zeitung. Vols. 1-130—. 1818-1936—. Forh. Vid.-Selsk. Christiania—Forhandlinger i Videnskabs-Selskabet i Christiania. Aar 1858-1924. 1859-1924. Forsch. Biol. Sta. Plén—Forschungsberichte aus der Biologischen Station zu Plén. Vols. 1-12. 1893-1905. Hedwigia—Hedwigia. Vols. 1-75—. 1852-1936—. Horae Phys. Berol.—Horae physicae berolinenses collectae ex symbolis virorum doctorum 1-123. pl. 1-27. 1820. Jahrb. Wiss. Bot.—Jahrbiicher fiir wissenschaftliche Botanik. Vols. 1-83—. 1857-1936—. Jour. Asiatic Soc. Bengal—-Journal of the Asiatic Society of Bengal. Vols. 1-73. 1832-1904. Jour. Bot.—The journal of botany, British and foreign. Vols. 1-74—>. 1863~1936—. Jour. Elisha Mitchell Soc.—Journal of the Elisha Mitchell Scientific Society. Vols. 1-52—. 1884-1936—. Jour. Linn. Soc.—Journal of the proceedings of the Linnean Society. Botany. Vols. 1-8. 1856-65. The journal of the Linnean Society. Botany. Vols. 9-49—. 1865~-1935—. Math. Term. Kézlem.—Mathematikai és természettudomanyi kézlemények vonat-kozélag a hazai viszonyokra. Kiadjaa Magyar Tudomanyos Akademia. Vols. 1-312. 1861-1925. Mém. Mus. Paris—Mémoires du Muséum d’histoire naturelle [de Paris]. Vols.1-20. 1815-32. Minnesskr. Fys. Sallsk. Lund—Minnesskrift utgifven af Kongl. Fysiografska Sallskapet iLund. 1878. Mus. Notes Vanc.—Museum (and art) notes. Issued by the Art, Historical and Scientific Association of Vancouver, B. C. Vols. 1-7. 1926-32. New Phytol.—The new phytologist. Vols. 1-35». 1902-36—. Nova Acta Soc. Sci. Upsal. III.—Nova acta Regiae societatis scientiarum upsaliensis. Series tertia. Vols. 1-20. 1851-1904. This was actually the second series of the ‘‘ Nova acta.” In calling it series “ tertia,” the ‘‘ Acta” were counted as the first series, the ‘‘ Nova acta ” as the second. Nuova Notar.—La nuova Notarisia. Vols. (‘ Serie’) 1-36. 1890-1925. Oefv. Finska Vet.-Soc. Férh.—Ofversigt af Finska Vetenskaps-Societetens férhandlingar. Vols. 1-64. 1853-1922. Part 1, 1937] BIBLIOGRAPHY 97 Oefv, Sv. Vet.-Akad. Férh.—Ofversigt af Konel. Vetenskaps-Akademiens férhandlingar. Vols. 1-59. 1844-1903. Ohio Jour. Sci.—The Ohio journal of science. Vols. 16-35->. 1915~36—. Continuation of ‘ Ohio naturalist.” Pam. Fizyjogr—Pamietnik fizyjograficzny. Vols. 1-27. 1881-1922. Papers Mich. Acad.—Papers of the Michigan Academy of Science, Arts, and Letters. Vols. 1-21—. 1923-36—. Proc. Acad. Phila.—Proceedings of the Academy of Natural Sciences of Philadelphia. Vols. 1-8 (for 1841-1856). 1841-57. 1857-1900. 1857-1901. Vols. 53-88 (for 1901-1936)—. 1901-37—. Proc. Am. Acad.—Proceedings of the American Academy of Arts and Sciences. Vols. 1-71—. 1846~-1937—. Proc. Am. Phil. Soc.—Proceedings of the American Philosophical Society, held at Philadelphia, for promoting useful knowledge. Vols, 1-76—>. 1838-1936—. Proc. Ind. Acad.—Proceedings of the Indiana Academy of Science. 1891-1923. 1892-1924. Vols. 34-45—. 1925~36—. Quart. Jour. Micr. Sci. II.—(The) Quarterly journal of microscopical science. New series. Vols. 1-78—. 1861-1936—. Rev. Alg.— Revue algologique. Vols. 1-8—. 1924-36—. Rhodora—Rhodora; journal of the New England Botanical Club. Vols. 1-38. 1899- 1936. Rozp. Akad. Umiej. II.—Rozprawy Akademii Umiejetnosci. Wydzial matematyczno- przyrodniczy. Serya II. Vols. 1-20. 1891-1902. Sitz.-ber. B6hm. Ges. Wiss.—Sitzungsberichte der Kénigl. béhmischen Gesellschaft der Wis- senschaften. Mathematisch-naturwissenschaftliche Classe. (Véstnik Krélovské Ceské Spoleénosti Nauk. Tfida mathematicko-piirodovédecké.) 1885-1917. 1885-1918. Sv. Vet.-Akad. Handl.—(Kongl.) Vetenskaps-akademiens handlingar. Vols. 1-40. 1741-79. 1813-1854. 1813-56. Between these two series came the “‘ Nya handlingar.”’ Techn. Publ. N. Y. Coll. Forestry—Technical publication of the New Vork State College of Forestry at Syracuse University. Nos. 1-47—. 1914-35->. Term. Fiiz—Természetrajzi fiizetek. Vols. 1-25. 1877-1902. Trans. Am. Micr. Soc.—Transactions of the American Microscopical Society. Vols. 17-55—. 1895-1936—>. Earlier vols. were entitled ‘‘ Proceedings of the American Society of Microscopists ” or “ Proceedings of the American Microscopical Society.” Trans. Linn. Soc. I.—-Transactions of the Linnean Society of London. Second series. Bot- any. Vols. 1-7—. 1875-1913—-. Trudy Obshch. Ispyt. Prir. Khark.—Trudy Obshchestva ispytatelei prirody (Imp.) Kharkov- skom Universitetye. Vols. 1-50—. 1869-1925—. Tufts Coll. Stud.—Tufts College studies. (Scientific series.) Vols. 1-5. 1894-1924. Vict. Nat.—The Victorian naturalist. Vols. 1-52. 1884-1936—. Vidensk, Meddel.—Videnskabelige Meddelelser fra den Naturhistoriske Forening i Kjoben- havn, for 1849-1910. 1849-1911 Vols. 63-95. 1911-33. INDEX Descriptions of accepted species are indicated by numbers in bold-face type, synonyms in italic, incidental mention and extra-limital species by roman figures. Bulbochaete rhadinospora 4, 5, 12 Bulbochaete imperialis 5 Androgynia 17 echinata 63 Huntii 55 mirabilis 65 multispora 65 Bulbochaete 3 affinis 5 alabamensis 10 alpina 14 angulosa 8 f. picta 3 anomala 3, 5, 14 areolata 15 basispora 6 borealis 4 Brebissonii 7 v. minor 84 brevifulta 5 Bullardi 14 Canbyii 10 cimarronea 12 congener 11 crassa 11 crassiuscula 10 crenulata 7 v. plena 7 v. supramediana § Debaryana 6 denticulata 5 depressa 7 diamesandria 3 dispar 10 v. Ripartiana 4 doliiformis 3 dumosa 13 elachistandria 3, 8 elatior 6 f. pumila 3 v. scrobiculata 6 ellipsospora 10 Furberae 7 v. depressa 7 gigantea 9 glabra 3, 84 gracilis 6 hiloensis 13 horrida 5 ignota 13 v. regalis 84 insignis 14 v. reticulata 14 intermedia 8 f. americana & v. depressa 8, 8 f. supramediana 8 lagoensis 5 litoralis 5, 84 megastoma 3 minor 13 v. germanica 5 minuta 7 mirabilis 6 v. gracilis 6 f. immersa 3 v. lapponica 6 monile 5 v. robusta 5 nana 5, 5 v. subbasispora 5 Nordstedtii 8 f. suberecta 9 v. minor 4 norvegica 4, 84 obliqua 9 pachyderma /4 polyandria 9 praereticulata 15 Pringsheimiana 1/4 punctulata 4 pygmaea 12 v. erecta 12 v. major 13 v. minor 12 pyrulum 4 quadrata 11 rectangularis 13 v. hiloensis 13 v. Lundellii 12 v. norvegica 12 v. tenuis 12 regalis 5, 84 repanda 12 reticulata 14 v. minor 13 98 f. antiqua 4, 5 v. litoralis 84 robusta 5 sanguinea 5 scrobiculata 6 sessilis 9 f. glabra 84 setigera 10, 10 v. Canbyii 10 speciosa 14 spinosa 15 spirogranulata 5 suberecta 9 subintermedia 4 subsimplex 13 tenuis 12 v. norvegica 84 tumida 7 valida 11 varians 13 v. alpina 13 v. hawaiensis 13 v. subsimplex 13 Woronichini 3, 84 Conferva capillaris 35 setigera 3, 10 undulata 73 vesicata 41 Cymatonema 73 confervaceum 73 Oedocladium 15 albemarlense 16 Hazenii 16 medium 16 operculatum 16 Protonema 15 Wettsteinii 16 Oedogonium 17, 36 abbreviatum 50 Ackleyae 70 acmandrium 48 v. stictospermum 21, 84 acrosporum 72, 72 v. bathmidosporum 72 f. boreale 72 Part 1, 1937] Oedogonium v. boreale 72 f. connectens 72 v. floridense 73 v. majusculum 73 acuminatum 25, 84 acutum 58 africanum 82 Ahlstrandii 55 alternans 24 ambiceps 79 americanum 45 amplius 52 amplum 39 angulosum 60 angustum 39 anomalum 35 apiculatum 42 apophysatum 62, 64 arcyosporum 45 Arechavaletae 66 areolatum 42 areoliferum 29 Areschougii 77 v. americanum 77 v. contortifilum 77 f. majus 77 f. robustum 77 argenteum 44, 44 f. michiganense 44 armigerum 63 Aster 56 aureum 42 australe 29 australianum 21 autumnale 53 bahusiense 26 bathmidosporum 72 bengalense 26 biforme 36 birmanicum 65 bohemicum 76 boreale 24, 26 v. americanum 79 Borgei 25, 85 Borisianum 64, 65 v. minus 65 v. Westii 65 Boscii 41, 42 f. dispar 42 v. notabile 20 v. occidentale 41 brasiliense 78 Braunii 59 v. hafniense 23 INDEX: OEDOGONIALES Oedogonium v. Zehneri 60 brevicingulatum 18, 85 Brittonii 47 caleareum 17 v. africanum 17, 85 v. gaditanum 59 calosporum 42 canadense 56 Candollei 33 capense 21 eapillare 35 v. flavescens 35 f. stagnale 36 capilliforme 37 v. australe 37 f. Debaryanum 37 f. diversum 37 v. diversum 37 v. Lorentzii 19 f. uberosporum 37 capitellatum 76 earbonicum 31 ceardiacum 31 v. carbonicum 31 f. interjectum 18 v. minus 31 f. pulchellum 18 carolinianum 41 cataractum 66 ciliare 50 ciliatum 71 circinatum 79 clavatum 78 Cleveanum 23 f. exoticum 85 Collinsii 80 columbianum 20, 85 commune 74 completum 82 concatenatum 64, 64 f. Hutchinsiae 64 v. Hutchinsiae 64 . lagenarioides 64 _ rectangulare 85 . regulare 64 v. superornatum 64 condensatum 66 confertum 77 consociatum 83 contortum 67 costatosporum 21, 85 costatum 68 crassipellitum 66 crassiusculum 66, 66 ada 99 Oedogonium v. Arechavaletae 66 v. cataractum 66 v. idioandrosporum 66 crassum 34, 39, 39 v. amplum 39 v. longum 40 v. orbiculare 39 v. subtumidum 20 crenulatocostatum 42 v. aureum 42 f. eylindricum 42 v. cylindricum 42 v. longiarticulatum 42 crenulatum 24 vy. gracilius 24 crispulum v. minutum 69 crispum 52 v. elongatum 52 f. gracile 53 v. gracilescens 53 f. granulosum 53 v. granulosum 53 v. hawaiense 53 f. inflatum 53 f. proprium 53 v. uruguayense 53 f. vernale 52 Croasdaleae 69 cryptoporum 27 f. abbreviatum 67 v. subdepressum 67 v. vulgare 27 curtum 27 curvum 27 cyathigerum 62 f, americanum 61 vy. ellipticum 62 v. hormosporum 23 f, ornatum 62 v. ornatum 62 f. perfectum 62 v. rumelicum 62 cymatosporum 29 y. areoliferum 29 v. chungkingense 17, 85 danicum 24 Debaryanum 37 decipiens 68 vy. africanum 68 vy. bernardense 24 f. dissimile 68 v. dissimile 68 delicatulum 67 depressum 59 100 Oedogonium diandronites 33 dictyosporum 43 f. Westii 20 dioicum 22, 37 diplandrium 7/ diversum 37 Donnellii 63 v. Wittrockianum 24 echinatum 63, 63 echinospermum 57, 57 v. horridum 57 elegans 17 v. americanum 74 eminens 25, 85 epiphyticum 50 eremitum 71 eriense 46 Euganeorum 50 excavatum 20, 85 excentriporum 61 excisum 21, &2 exiguum 28 exmonile 25, 85 exocostatum 40 exospirale 58 exostriatum 26, 85 exoticum 23, 85 fabulosum 40 v. columbianum 85 v. maximum 85 Vv. punctatum 85 fennicum 33 figuratum 44 flavescens 59 v. gynandrosporum 59 v. minus 59 flexuosum 83 fonticola 7/1, 83 v. flavescens 71 foveolatum 43 fragile 32, 33 v. abyssinicum 18 v. robustum 85 Franklinianum 31, 50 fuscurm 55 fusum 21, 27 gallicum 59 gemelliparum 39 v. majus 39 geniculatum 35 giganteum 84 glabrum 31 globosum 32 gracilius 36 NORTH AMERICAN FLORA Oedogonium gracillimum 54 f. majus 22 grande 17, 38 v. aequatoriale 38 v. angustum 39 f. gemelliparum 19 f, hortense 35 v. majus 38 f. robustum 38 v. robustum 38 Gunnii 48 Hallasiae 54 herjedalicum 19, 20, 85 hians 70 v. megasporum 80 Hirnii 32 v. africanum 75 hispanicum 52 hispidum 55 Hoehnei 20 hoersholmiense 25 Hohenackerii 71 Howardii 49 v. minus 49 Howei 48 huillense 47 Huntii 55 Hutchinsiae 64 hystricinum 56 v. excentriporum 61 Hystrix 56, 57 v. canadense 56 v. subglobosum 85 idioandrosporum 66 v. minus 66 illinoiense 58 v. oklahomense 58 Ilsteri 21, 85 implexum 25 incertum 61 inconspicuum 84 indianense 45 indicum 26 inerme 17 infimum 48 inflatum 18, 20 inframediale 23, 85 insigne 21 v. minus 47 intermedium 32, 33, 71 v. fennicum 33 v. szechwanense 18, 85 inversum 48 f. subclusum 48 [VoLumME 11, Oedogonium v. subclusum 48 iowense 51 irregulare 65 v. condensatum 66 Itzigsohnii 47 f. heteromorphum 21 f. minus 21 Jaoii 79 Kirchneri 22 Kitutae 24 Kjellmanii 20 Klebahnii 82 Kurzii 35 laetevirens 70 laeve 28 lageniforme 35 Lagerheimii 53 Lagerstedtii 24 Landsboroughi 39 v. norvegicum 39 v. robustum 39 latiusculum 75 latviense 82 lautumniarum 31, 32 leiopleurum 20 Lemmermannii 31 Lindmanianum 24 longatum 69, 70 longiarticulatum 42 longicolle 67 f. afghanicum 67 v. senegalense 67 longum 40 loricatum 52 Lundellii 28 lundense 71 macrandrium 70 f. acuminatum 84 f, aemulans 7] v. aemulans 71 v. Hohenackerii 71 f. lundense 71 Vv. propinquum 71 v. scrobiculatum 70 macrospermum 68 f. patagonicum 68 magnum 61 Magnusii 28, 29 majus 38 mammiferum 47 manschuricum 23 margaritiferum 20 martinicense 34 maximum 20, 85 Part 1, 1937] INDEX: OEDOGONIALES 101 Oedogonium Oedogonium Oedogonium megaporum 738 pachydermatosporum 50 punctatum 44 mexicanum 38 pachydermum 55 pungens 57 michiganense 80 minus 75 minutissimum 84 mirandrium 24, 25 mitratum 49 monandronites 33 monile 69 f. Borgei 85 v. eminens 85 f. victoriense 85 moniliforme 30 Montagnei v. saxicola 71 v. submarinum 71 montichii 48 multisporum 65 v. magnum 61 nanum 51 nebraskense 56, 56 v. Whitfordii 56 neglectum 33 nobile 47 .v. minus 47 nodulosum 74, 74 v. commune 74 Nordstedtii 50 obesum 53 oblongellum 54 oblongum 54 v. fusiforme 22, 85 f. majus 54 v. majus 54 f. sphaericum 54 v. sphaericum 54 oboviforme 38 obsoletum 30 obtruncatum 72 v. completum 8&2 v. ellipsoideum 72 v. oblatum 77 occidentale 41 ochroleucum 28 oelandicum 78 f. minus 85 v. novae-angliae 78 v. subpyriforme 78 operculatum 26, 85 orientale 20, 85 ornatum 62 Oryzae 82 ouchitanum 76 oviforme 34 pachyandrium 37 paludosum 34, 41 v. americanum 41 V. parvisporum 41 paraguayense 18, 85 patulum 75 paucocostatum 46 v. gracile 46 patcostriatum 46 paulense 40 peipingense 22, 85 perfectum 62 perspicuum 24 Petri 22 piliferum 71, 76 pisanum 50 v. gracile 50 Pithophorae 51 plagiostomum 36 v. gracilius 36 platygynum 47, 79 v. ambiceps 79 v. continuum 24, 26 f. majus 79 v. novae-zelandiae 26 f. obtusum 26 v. osiliae 79 plicatulum 24 plusiosporum 30 pluviale 71 poecilosporum 84 polymorphum 30 porrectum 51 v. africanum 22, 85 pratense 49 praticolum 81 princeps 36, 37 Pringsheimii 50 v. abbreviatum 50 v. brevius 50 f. Euganeorum 50 v. Nordstedtii 50 f. pachydermatosporum 50 propingttum 71 psaegmatosporum 49 pseudacrosporum 46 pseudo-Boscii 33 pseudoplenum 77 pseudospirale 23, 85 pulchrum 24 punctatostriatum 27 v. minus 75 pusillum 82 pyriforme 52 pyrulum 22 v. amplius 52 v. obesum 53 quadratum 26 rectangulare 24, 85 Reinschii 73 reticulocostatum 45 rhodosporum 83 Richterianum 34 rigidum 80 rivulare 37 v. majus 39 robustum 18, 85 rostellatum 52, 53 Rothii 67 f. majus 68 rufescens 28 f. elongatum 28 f. exiguum 28 v. exiguum 28 subsp. Lundellii 28 v. Lundellii 28 rugulosum 68 f. minutum 69 v. minutum 69 f. rotundatum 69 v. rotundatum 69 rupestre 53 f, pseudautumnale 53 sancti-thomae 83 santurcense 30 Schmidlei 69 _ scrobiculatum 43 Selandiae 22 semiapertum 23 senegalense 67 setigerum 65 sexangulare 60 v. angulosum 60 v. majus 60 silvaticum 64 simplex 22 sinense 23, 85 sinuatum 74 sociale 28 Sodiroanum 33 sol 21 spectabile 72 spetsbergense 27 sphaerandrium 25, 26 102 Oedogonium sphaericum 54 spinospermum 61 spirale 59 v. acutum 58 v. latviense 2 spiralidens 23, 85 spiripennatum 57 spirogranulatum 75 spirostriatum 75 spurium 76 stagnale 35, 36, 37 v. variabile 35 stellatum 61 Stephensiae 19, 85 sterile 73 striatum 63 subareolatum 43 subglobosum 23, 80, 85 suboctangulare 19 suborbiculare 81 subpisanum 50 subplenum 77 subrectum 40 subsexangulare 60 suecicum 29 f. australe 29 v. australe 29 supremum 81 Taftii 80 tapeinosporum 83 v. angolense 83 taphrosporum 45 NORTH AMERICAN Oedogonium Taylorii 76 tentoriale 73 Tiffanyi 44 trioicum 22 tumidulum 21, 34 tyrolicum 31 Uleanum 24 undulatum 73 v. americanum 74 v. interrupte-incisum 73 v. Moebiusii 73 f. senegalense 74 v. senegalense 74 upsaliense 34 urbicum 18 v. oviforme 34 urceolatum 20 varians 30 Vaucherii 32, 33 f. insulare 33 velatum 21, 25 vernale 30, 52 verrucosum 43 vesicatum 68 v. flavescens 53 victoriense 66 _ virceburgense 22, 26, 27 vulgare 27 wabashense 81 Warmingianum 18, 20 Welwitschii 51 Westii 65 FLORA [VoLuME 11, Oedozonium Wolleanum 62 v. concinntuin 63 f. insigne 63 v. insigne 63 Wyliei 44 Zehneri 60 zigzag 18 Pringsheimia 17 inaequalis 31 Prolifera 17 Borisiana 64 Boscii 41 rivularis 37 Rothii 67 Vaucherii 33 Vesiculifera 17 aurea 64 Borissii 64 Candollei 52 capillaris 36 cardiaca 31 ciliata 71 concatenata 64 crassa 39 crispa 52 dissiliens 7 flavescens 59 Landsboroughi 39 paludosa 41 princeps 36 vernalis 52 COMPLETED VOLUME 9: i-iv, 1-542. (Agaricales:) Polyporaceae (pars), Boletaceae, Agaricaceae (pars). Complete in 7 parts. PARTS OF VOLUMES PREVIOUSLY PUBLISHED 3!: 1-88. Hypocreales: Nectriaceae, Hypocreaceae. Fimetariales: Chaeto- miaceae, Fimetariaceae. 6': 1-84. Phyllostictales: Phyllostictaceae (pars). 7': 1-82. Ustilaginales: Ustilaginaceae, Tilletiaceae. 7?: 83-160. 73: 161- 268. 74: 269-336. 75: 337-404. 7%: 405-480. 77: 481-540. 78: 541- 604. 7°: 605-668. 7': 669-732. 74: 733-796. 7: 797-848. 78: 849- 969. Uredinales: Coleosporiaceae, Uredinaceae, Aecidiaceae. 10': 1-76. 10?: 77-144. 10°: 145-226. 104: 227-276. 105: 277-348. (Agari- cales:) Agaricaceae (pars). 141; 1-66. Sphaerocarpales: Sphaerocarpaceae, Riellaceae. Marchantiales: Ricciaceae, Corsiniaceae, Targioniaceae, Sauteriaceae, Rebouliaceae, Marchantiaceae. 15': 1+75. Sphagnales: Sphagnaceae. Andreaeales: Andreaeaceae. Bryales: Archidiaceae, Bruchiaceae, Ditrichaceae, Bryoxyphiaceae, Seligeriaceae. 152: 77-166. Dicranaceae, Leucobryaceae. 16!: 1-88. Ophioglossales: Ophioglossaceae. Marattiales: Marattiaceae. Filicales: Osmundaceae, Ceratopteridaceae, Schizaeaceae, Gleicheniaceae, Cyatheaceae (pars). 17!: 1-98. Pandanales: Typhaceae, Sparganiaceae. Naiadales: Zannichel- liaceae, Zosteraceae, Cymodoceaceae, Naiadaceae, Lilaeaceae. Alismales: Scheuchzeriaceae, Alismaceae, Butomaceae. Hydrocharitales: Elodeaceae, Hydrocharitaceae. Poales: Poaceae (pars). 177: 99-196. 17%: 197-288. 174: 289-354. 175:355-418. 178:419-482. 177:483-542. Poaceae (pars). 18': 1-60, 182: 61-112. 18%: 113-168. 184: 169-240. 18°: 241-312. 18°: 313- 392. 187: 393-478. (Poales:) Cyperaceae (pars). 211: 1-93. Chenopodiales: Chenopodiaceae. 21?: 95-169. Amaranthaceae. 213: 171-254. Allioniaceae. 214: 255-339. Batidaceae, Petiveriaceae. Tetragoniaceae, Portulacaceae, Basellaceae. 221: 1-80. Rosales: Podostemonaceae, Crassulaceae, Penthoraceae, Parnas- siaceae. 227: 81-191. Saxifragaceae, Hydrangeaceae, Cunoniaceae, Itea- ceae, Pterostemonaceae, Hamamelidaceae, Altingiaceae, Phyllonomaceae. 223: 193-292. Grossulariaceae, Platanaceae, Crossosomataceae, Connar- aceae, Calycanthaceae, Rosaceae (pars). 224: 293-388. 22°: 389-480. 22°: 481-560. Rosaceae (pars). 231: 1-76. 23%: 77-136. 23%: 137-194. (Rosales:) Mimosaceae. 23): 195- 268. Krameriaceae, Caesalpiniaceae (pars). 23°: 269-349. Caesalpini- aceae (pars). 241: 1-64. 247: 65-136. 248: 137-200. 244: 201-250. 245: 251-314. 24°: 315-378. 247:379-462. (Rosales:) Fabaceae (pars). 251: 1-87. Geraniales: Geraniaceae, Oxalidaceae, Erythroxylaceae, Linaceae. 257: 89-171. ‘Tropaeolaceae, Balsaminaceae, Limnanthaceae, Koeberlini- aceae, Zygophyllaceae, Malpighiaceae. 25°: 173-261. Rutaceae, Surian- aceae, Simaroubaceae, Burseraceae. 254: 263-326. Meliaceae, Trigoni- aceae. Polygalales: Vochyaceae, Polygalaceae (pars). 25°: 327-383. Polygalaceae (pars), Dichapetalaceae. 291: 1-102. Ericales: Clethraceae, Monotropaceae, Lennoaceae, Pyrolaceae, Ericaceae. 321: 1-86. 322: 87-158. 323: 159-228. 324: 229-300. Rubiales: Rubiaceae (pars). 331: 1-110. Carduales: Ambrosiaceae, Carduaceae (pars). 341; 1-80. 347: 81-180. 34°: 181-288. 344: 289-360. (Carduales:) Car- duaceae (pars). fi LANCASTER PRESS, INC., LANCASTER, PA.