a eae Vol. 2. (wewsenrss) JANUARY, 1902. | BULLETIN WISCONSIN NATURAL HISTORY SOCIETY CONTENTS. c PAGE PROCEEDINGS OF THE WISCONSIN NATURAL HISTORY SOCIETY ..............0005 3 STUDIES IN PLANT DISTRIBUTION—E. BRUNCKEN .........00...ccccscccsstccecesccevecce 17 FLOWERS ADAPTED TO FLESH-FLIES—-DR. S. GRAENICHER..........c000.eeeeeceenee 29 ADDITIONS TO THE FLORA OF MILWAUKEE COUNTY—W. J. BENNETTS........ 39 CONTRIBUTION TOWARDS A LIST OF MILWAUKEE COUNTY FUNGI-—-C. E., BROWN AND V. FERNEKES ..........00..0000% ARE See eens OST oy oN a A ae BD 45 NOTES ON A COLLECTION OF HAMILTON FOSSILS FROM THE TOWN OF BETH- Rye SOVENE SEE LON. Y= Gs MONROE osoic, ec 5ic ole eteecCancusecdeds o¥3 View THE WINTER HABITS OF THE RED HEADED WOODPECKER--H. A. WINKEN- SINR wt ee te RSS doce ected ces cues vac one bau ndyecnecr cede ciedsderscesases 69 ~PLACE MODES OF ACRIS GRYLLUS FOR MADISON, WIS.—P. H. DERNEHL...... 75 THE POLYODON SPATHULA—-HORACE BEACH, SR.......:seseescccccceeescseecsseseccess 85 MMe PRETO WEEE Be oe es ees Shs oe ea oe ae eek ce ia Sane an Paaweee vo naga Blkwecerec levee 89 MILWAUKEE, WISCONSIN. EVENING WISCONSIN CO., PRINTERS, MILWAUKEE. The Wisconsin Natural History Society, MILWAUKEE, WIS. ORGANIZED MAY 6, 1857. OFFICERS. EDGAR E. TELLER—PRESIDENT....ecceeceee: 3303 Cedar Street, Milwaukee DR. S. GRAENICHER—VICE PRESIDENT.....551 Seventh Street, Milwaukee W. J. BENNETTS—GEneERAL SeEc’y....413 Twenty-third Street, Milwaukee LEE R. WHITNEY—Conr. SEc’Y.........., Room 225, P. O. Bldg., Milwaukee GEO. A. WEST—TREASURER........00..:00000 2828 Highland Bl’vd, Milwaukee A} BIB RSAC H—DIBRARIAN (rile he inca tintin tee. Public Museum, Milwaukee a DIRECTORS OF SECTIONS. Secretary of Sections, C. E. Brown Geology, - - - - C.E. Monroe Archeology, - W.H. Ellsworth Ornithology, - -. Edw. E. Voss Numismatics, - W. F. Sandrock Entomology, - - C.E. Brown Botany, .- - - - - E. Bruncken Mineralogy, - - - Louis Lotz REGULAR MEETINGS. (1) These are all held in the Society’s lecture room in the Museum-Library Bldg., Milwaukee. (2) Meetings of the combined sections take place on the 2nd Thursday of each Month, at8 P. M. 4 ‘ (3) The Archeology and Numismatics sections meet on the 3d Thursday of each Month. cs (4) General meetings are on the last Thursday ofeach Month except July and August. (5) Meetings of the Archeologists and collectors of the State are to be held semi-annually under the direction of the Archeology section, for the purpose of. furthering the cause of Wisconsin Archeology. PUBLICATIONS. (1) The ‘Bulletin of the Wisconsin Natural History Society’’—a 64 page octa- vo publication issued quarterly. Editor, W. J. Bennetts. (2) The ‘‘Wisconsin Archeologist,’’ published by the Archeology section. Edi- tor, C. E. Brown. & MEMBERSHIP DUES. Local Members, $3.00 per annum; Non-resident Members, $1.00 per annum; Life Members, one payment of fifty dollars. a Digitized by the Internet Archive in 2015 https://archive.org/details/bulletinofwiscon2190wisc BULLETIN OF THE WISCONSIN NATURAL HISTORY SOCIETY. Vol. 2 New Series. JANUARY, 1902. No. 1. Proceedings of the Wisconsin Natural History Society. September 27, 1900 to October 31, 1903. THURSDAY, Sept. 27, 1900. Twenty-four persons were present at this meeting, which was held in the lecture room of the Public Museum. President Teller occupied the chair. Chas. E. Brown as secretary of sections read an interesting report on the work done at the union section meetings during the three preceding months, and concluded by dwelling at some length upon the benefits to be derived from attending these meetings. Dr. Peckham then drew attention to a card index of publica- tions on the flora and fauna of Wisconsin that he was then at work upon and promised to describe it at greater length at a future meeting. The resignation of Paul H. Dernehl as librarian was accepted and Mr. Paul Rhode elected to the vacancy. John H. Fiebing and Adolph Biersach were elected members of the society and Prof. Wm. H. Wheeler of the University of. Texas an honorary member. John A. Brandon then read a paper on local ornithology that revealed a deep interest in, and much patient observation of the birds. All of the common visiting and migratory species were considered in the order of their appearance and departure, and the habits of many of them—particularly of the horned lark, the sap- sucker and the purple martin—were described at considerable length. 4 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 2. No. 1. A paper written by Paul H. Dernehl on the Purple Martin (Progne subis Bd.) was read by Chas. E. Brown. For many years past martins have each year occupied bird houses set out for their use at the home of Mr. Dernehl, and his paper was chiefly based upon notes he has taken during the past six years upon their breeding and other habits. The meeting was then adjourned. THurspay, Oct. 25, 1900. This meeting was held in the Museum lecture room with President Teller in the chair and thirty persons present. Chas. E. Brown reported on a meeting of the united sections of the society held Oct. 11, and also on a meeting of the Arche- ology Section at the home of Mr. Henry R. Denison. Mr. F. M. Benedict then addressed the meeting on the “Earth- works and Other Traces of Pre-historic Man Existing in Wau- paca County, Wis.” After describing the topography and geological character of the region, with its underlying formations of granite and Potsdam sand, the speaker described the principal ancient village-sites, Indian trails and groups of mounds of the “Chain o’ Lakes” dis- trict with which he was most familiar. The village sites were marked by numerous kitchen-middens from which little had been obtained except broken pottery and broken cobblestones, the latter bearing evidence of having once been employed when heated to boil water for the ancient villagers. The speaker estimated the ancient cornfields to be fully 350 years old, basing his views upon the remains of trees that rested upon the ancient cornhills. The principal mounds in that region were stated to be, (1) six effigy mounds of the turtle form that had contained encysted skeletons in a sitting posture, (2) a man mound 400 feet long, (3) a group of seven oblong mounds and (4) about 46 round mounds scattered throughout the district under consideration. Two prehistoric excavations in the vicinity of the lakes were also described. Dr. Stanhope, Rev. O. G. McNeill and C. E. Brown took part in a discussion that followed this address. The following were nominated for membership by Mr. Nehr- ling and President Teller, and duly elected: Messrs. Carl Bartelt, Aug. Cloos, Henry R. Denison, Sydney R. Hartwell, Edw. E. Voss and Lindsay Webb. There being no further business, the meeting was adjourned. JANUARY, 1902. . PROCEEDINGS. 5 Tuurspay, Nov. 22, 1900. The general meeting for November was held on the evening of the twenty-second, in the Museum lecture room, with President Teller in the chair and thirty persons present. Chas. E. Brown reported on a meeting of the combined sec- tions held on the eighth of the month. Dr. Robinson was proposed for membership by Mr. Nehrling and elected a member of the society. Dr. S. Graenicher next read a paper on the “Fertilization of Symphoricarpos and Lonicera,” illustrating it by drawings show- ing the structure of the flowers and by specimens of all the insects he had found visiting them. Two species of Symphoricarpos were considered, S. racemosus and S. occidentalis. The first was vis- ited principally by the smaller bees and the other also by a great many wasps. Of the five species of Lonicera native to this locality, two, L. ciliata and L. Tatarica, are visited principally by the smaller bees, while the three remaining species, L. dioica, L. oblongifolia and L. Sullivanti, are bumble-bee flowers, but include also many of the smaller bees, a few flies and lepidoptera, as well as the humming bird among their visitors. Tuurspay, Dec. 27, 1900. This meeting was held in the usual place—the Museum lecture room—and was presided over by President Teller. The attend- ance was twenty-five. C. E. Brown reported on a union section meeting and also on a meeting of the Archeology Section held earlier in the month. Mr. Valentine Fernekes was proposed for membership by Mr. Nehrling and duly elected. Ernest Bruncken then addressed the meeting on the physiog- raphy of Milwaukee County. The speaker described the general features of the surface geology of the vicinity and drew attention to many problems that still awaited solution, such for instance as whether the terraces along the Menominee valley were identical in height with corre- sponding ones along the lake front. He drew attention also to the absence of large limestone boulders in this vicinity in contrast to their frequent occurrence farther west. President Teller then read an instructive paper on fossil cepha- lopods, illustrating it with a number of specimens of local species from his own collection. He drew attention to a variation he had detected in the siphuncle of a cephalopod, Orthoceras abnorme 6 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 2. No, 1. Hall, occurring in the Niagara formation at Racine, Wis., which perhaps justified its being considered as a new species or sub- species. { W. J. Bennetts read a paper on the winter birds of Lake Michi- gan, mentioning those species of the loons, grebes and gulls that were known to winter on the lake, and giving some attention to their winter habits. The meeting was then adjourned. TuHurspay, January 31, 1901. The Wisconsin Natural History Society met this day in the lecture room of the Public Museum; thirty-three persons were present and President Teller occupied the chair. Chas. E. Brown reported on section meetings held during the month, after which Mr. P. V. Lawson addressed the meeting on the antiquities occurring in the vicinity of Menasha, Wis. The oldest relics of pre-historic man in that locality were con- sidered by the speaker to be a class of chipped stone implements found by him on the shores of Lake Winnebago and at Green Bay. They are of a black sandstone similar to the stone implements found in the Trenton gravels of New Jersey and probably belong to an age equally remote. Next in order of antiquity are probably the stone cairns, and shell mounds, that occur at several places around lakes Winnebago and Winneconne. Effigy mounds and oval mounds are exceedingly common in the locality considered. Three lizard mounds and a turtle mound have been preserved in the Elisha D. Smith Park, Menasha. Near Little Butte des Morts are two remarkable serpent mounds 1,210 and 1,580 feet long respectively, while near Stockbridge is what is probably the finest group of existing mounds in the world occupying 90 acres of primeval forest and representing many types. The address was illustrated by numerous drawings and maps made from surveys taken by the lecturer, as well as by many archeological specimens and photographs. Mr. John H. Tweedy was elected a member of the society and Dr. R. Menger, San Antonio, Texas, a corresponding member, after which the meeting was adjourned. TuHurspDay, February 28, 1901. ' The Wisconsin Natural History Society held its general meet- ing this day in the Museum lecture room with the President in the chair and twenty-eight members and visitors present. JANUARY, 1902. PROCEEDINGS. 7 The report of the January meeting was read by the secretary and reports of two section meetings by Chas. E. Brown. At one of these—a meeting of the Archeology Section on the 21st—it had been proposed to extend the membership of the section so as to include archeologists from all parts of Wisconsin, and thus give the section the character of a state organization. As a preliminary step in this direction Chas. E. Monroe gave notice that at the next meeting he would propose a change in the by-laws of the society so that hereafter the fee of non-resident members should be one dollar a year. Mr. A. W. Slocum then read an instructive and interesting paper entitled, “The Development of Life Upon the Earth as Re- vealed by Paleontology.” After a brief historical account of the growth of the science, the different ‘forms of fossils were mentioned and described, as well as illustrated by specimens and plaster of Paris models. The geological eras were then considered in their order and at this point Mr. Slocum displayed a set of charts prepared by himself to illustrate the development of each of the classes of the animal and the vegetable kingdoms during geologic time. Each class was then taken up separately and its development clearly described, numerous specimens from the Public Museum collec- tion of fossils being employed to illustrate the subject. At this meeting Mr. Otto Grigrutsch was elected an ordinary member of the society. TuHurspay, March 28, Igor. President Teller presided over this meeting, at which twenty- eight persons were present. The minutes of the last meeting were read by the Secretary and Mr. C. E. Brown reported on two sec- tion meetings of much interest that had been held earlier in the month. The lecture of the evening was to have been one on paleon- tology by Dr. Stuart Weller of Chicago, but the day previous word had been received from him that he would not be able to be present. Three members of our society had therefore hastily prepared papers for the evening, which, if somewhat incomplete, were yet interesting on account of the variety of subjects treated. : The first paper by C. E. Brown was on the “Geographical Dis- tribution of the Milwaukee Butterfly, Anosia ple~tppus.” The de- velopment and habits of this commonest of our lepidoptera were described and its range on the American continent shown to be from the shores of Alaska and Hudson Bay to the northern boun- daries of Patagonia. 8 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY, VOL. 2. NO. }. During the last half century it had spread westward to the South Sea Islands, the Malay Archipelago, and the Southern Asi- atic coast, while to the east of our continent it had during the same period obtained a foothold in the Bermudas, the Azores and the western countries of Europe and Africa. At the end of another half century Mr. Brown predicted it would be doubtless common throughout most parts of the known world. Mr. W. J. Bennetts then read some notes on the life history of the Virginia deer, Cariacus Virginiana. The points chiefly considered were the development of its dif- ferent coats and of the antlers, and its food and feeding habits at different seasons of the year. Geo. A. West followed with a paper based upon a recent journey taken by him through the Republic of Nicaragua, Central America. . It dealt principally with the habits and superstitions of the natives of the East Coast. He also described at some length the peculiar habits of the leaf-carrying ants and also of the termites or white ants, to both of which he had paid considerable attention while in their habitat. Mr. West also exhibited a sheet used by the Indians and made from the inner bark of a native tree, and also some artistic examples of inlaid gold work done by one of the native women. The meeting was then adjourned. Tuurspay, April 25, 1901. This being also the annual meeting of the society, much of the time was occupied by the reading of the reports of progress by the different officers. C. E. Brown described what had been accomplished in the Biology sections and in the sections of Archeology and Numis- matics during the past year, while the report of the treasurer, J. A. Brandon, showed that financially the society was in a satisfactory condition, there being a balance of $232.77 in the treasury. W. J. Bennetts also reported concerning his work as recording secretary and editor of the society’s Bulletin. Secretary’s Annual Report for the Year from April 27, 1900, to April 25, 1901. The progress made by the society during the past year and the work accomplished by it has been of a satisfactory nature. Its membership now numbers 109, an increase of 22 over that of last year. Ten general meetings have been held, at which the average attendance was 27 and at which 15 papers were read JANUARY, 1902. PROCEEDINGS. 9 by members of our society and others. These papers were prin- cipally of a popular nature, being intended for the general mem- bership of the society and not for the specialist, and were as follows: Po Dante SAP LOUNUS: 5 ies een oe Lee R. Whitney Ts I AS See Sales Sa ar eae a ee Ernest Bruncken 3. “Crustaceans of the Niagara Formation”........ ir, peller ie and dames at Wtawa, Beach ley koe ens E. Bruncken YT Da Del 2) 2 a oe Pr J. A. Brandon 6. “Earthworks ef Watipaca County”. .....°.... F. M. Benedict 7. “Fertilization of Lonicera and Symphoricarpos......... “yh OS AOR Pe ae Br cick cara gee pea ei Dr. >. Gratnicher 8. “Physiography of Milwaukee County”........ E. Bruncken SoMa IOMOUS von acl ths y sie es ele e we oe reer Rh. Wither Hirde of Jake’ Michipan oe. W. J. Bennetts Behe ae ROMAINE IC SNCS ELIS SIRS ty aia a ere trees P. V. Lawson 12. “Development of Life Upon the Earth as Revealed by ROUSE a BARRE teed EE RD opr Sapa nn a wag A. W. Slocum fo Lite vistory ot the Virginia Deer”... 2° W. J. Bennetts fe nan pitves of Nicatagtia (856 ote ees os Cr AAW est 15. “Geographical Distribution of Anosia Plexippus’’.C. E. Brown One of the most important ways in which our society has been of use to its members has been through the interchange of ideas and observations at the section meetings. Of these 19 have been held, 9 of the Archeology section, and IO union meetings of the other sections. Many papers of a special character and containing the results of original investigation were presented at these meetings, a detailed account of which will be found in the report of their proceedings. Two Bulletins, aggregating 130 pages, have been issued dur- ing the year. It has been our aim to publish nothing in our peri- eaical but articles containing a large proportion of new facts or based upon original observations and research. Naturally our society is expected to be the authority on all matters relating to the natural history of its own locality and to make it its special object to encourage and to carry on investi- gations in that field. In this regard the work done has been encouraging and satis- factory. In the field of entomology we have published a list of the Lepidoptera of Milwaukee County by Messrs. Rauterberg and Dernehl, a list of the Syrphidae by Dr. Graenicher, and studies on our solitary wasps by Geo. W. and Eliz. G. Peckham. In the field of Botany Dr. S. Graenicher has worked up the local methods of fertilization of a great many of our native plants and we have published his papers on the fertilization and insect 10 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 2. NO, 1. visitors of the different species of Lonicera and Symphoricarpos, and on Trillium mivale, Erigema bulbosa and Salix discolor. Ernest Bruncken has also reported on the forest conditions of the vicinity and has worked up our species of Salix and Betula, while W. J. Bennetts has published a second supplement to W. M. Wheeler’s “Flora of Milwaukee County.” In Ornithology we have published papers on our local Avi- fauna by John A. Brandon, P. H. Dernehl and W. J. Bennetts. A paper by Geo. A. West on the “American Crocodile” was a valuable contribution to our knowledge of that little known animal. Still, an enormous amount of work remains to be done in de- veloping the knowledge of our local natural history. Wisconsin is almost an unworked field in this respect and less has been done in the way of exploring its flora and fauna than has been accom- plished in much younger states lying to the west of us. Even in regard to the district lying immediately around our city it may be said that definite and accurate knowledge is still wanting in almost every line of natural-history. The following subjects only may be mentioned regarding each of which almost no work has been done,—the mosses, lichens, fungi, fresh water alge, the fishes, batrachians, crustaceans, reptiles and molluscs, without en- tering at all the immense field of entomology. A recently published bibliograhpy of Indiana molluscs contains twelve pages and about 100 titles. A Wisconsin list would prob- ably contain the titles of less than a dozen papers. There are two matters which affect us in accomplishing work of this kind and which should receive careful consideration by our society in the near future. There should in the first place be a closer working relationship between our society and the Mil- waukee Public Museum. In order to arrive at an accurate knowledge of any of our local species it is necessary that large numbers of specimens be collected and preserved for future comparison and study. As an example it is well known that our common garter snake, Eutaenia sirtaris, is exceedingly variable, so that eleven or more sub-species are dis- tinguished, and it is plainly only possible to arrive at the status of our own local species and varieties by the accumulation of a large collection of specimens. Some understanding and method of co- operation should clearly exist between our society and the Museum in matters of this kind. Another matter. When our society was first organized one of its leading objects was clearly stated to be the formation of an efficient reference library of natural history works. For the past 40 years it has been receiving books and pamphlets of this char- JANUARY, 1902. PROCEEDINGS. 11 acter by purchase and exchange, and these are all at present stored in the offices of the Public Museum, and, besides being almost in- accessible, are uncatalogued and unindexed, and therefore of prac- tically no use to the society. There is urgent need for a well arranged and fairly complete Natural Science Library here in Milwaukee, and we should not let the matter rest until something permanent has been accom- plished in this direction. Still another matter has been in a manner thrust upon us dur- ing the past few months. The founders of our society plainly intended it as a state organization, and named it the Wisconsin Society, and distant parts of the State have at all times been repre- sented on its membership roll, but the actual work of the society has practically always been confined to the vicinity of this City and to Milwaukee County. Letters, however, have been received of late from science teachers, collectors and archeologists throughout the state, express- ing a desire that our field of work be extended so that our society become in fact as in name a state organization. In fact steps have already been taken in our Archeology Section to extend its mem- bership and its field of work in this way, but we think it wise to consider the matter well and weigh well all our resources before committing ourselves to any definite step of this kind. A large non-resident membership can only be successfully retained and the work of the organization carried on with such, by correspond- ence and publications, and this implies an immense amount of work for those who have it in charge. In other societies where such work is successfully conducted, those entrusted with it are generally persons having considerable leisure or those holding positions whose duties do not clash with the work thev do for their society, such as government scientific officials or University professors. There are, we believe, no men of leisure among our active members and probably none who could look after such work effi- ciently without considerable self-sacrifice, so that it behooves us not to hastily take any step in this matter until we are assured that what we do will be permanent and done well. W. J. BENNETS, Secretary. _ A Committee on Membership, consisting of Messrs. Habhag- ‘ger, Cline, Stanhope and Bennetts, which had been nominated at a section meeting, was approved by the society upon a motion made by Mr. Harlowe. | A motion to the effect that the dues of non-resident members should henceforth be $1.00 per annum was made by Dr. Chas. Stanhope and unanimously carried. 12 BULLETIN OF WISCONSIN NATUBAL HISTORY SOCIETY. VOL. 2. NO. 1. The officers for the ensuing year were then elected as follows: President—E. E. Teller. Vice-President—Dr. S. Graenicher. General Secretary—W. J. Bennetts. Corresponding Secretary—Lee R. Whitney. Treasurer—Geo. A. West. Librarian—Adolf Biersach. DIRECTORS OF SECTIONS. Entomology—C. E. Brown. Botany—E. Bruncken. Archeology—W. H. Ellsworth. Numismatics—W. F. Sandrock. Geology—C. E. Monroe. Ornithology— Mineralogy—Louis Lotz. The following were also elected to membership: Messrs. A. S. Mitchell, J. A. Sheridan, Thos. G. Laurenzen. Mr. Adolf Biersach then read a paper entitled, “Snakes of the Genera Elaps and Osceola.” Elaps is a genus of poisonous snakes consisting of about thirty species, whose character as to whether they are poisonous or non-poisonous was for many years a sub- ject of debate among herpetologists. They are beautifully marked with red, black and yellow rings, and are mimicked in this par- ticular by the king snakes of the genus Osceola, which on the contrary are all perfectly harmless. It was shown by the speaker that the venomous genus could be distinguished from the non-venomous one by the fact that in Elaps the black rings are bordered by the yellow, while in Osceola the yellow rings are bordered by black. The paper was illustrated by charts and drawings and by alco- holic specimens of Elaps fulvius and of Osceola doliata coccinea. TuurspaAy, May 30, 1901. At this meeting Mr. A. Schroeder and Rev. J. W. Berg of St. Francis were elected members of the society, after which those present listened with much interest to a lecture by Prof. Stuart Weller of the University of Chicago entitled, “Modern Problems in Paleontology.” The lecturer described the methods employed, and some of the results achieved, by that branch of Paleontological Geology which dealt with faunal societies. It was shown how by its aid it ws possible in a measure to restore the ancient geography of the earth at any geological period, and to determine the migrations of any of the fossil faunal types. JANUARY, 1902. PROCEEDINGS. 13 Prof. Weller then considered the Mississippi valley region of our continent; treating in detail each geologic period from the Silurian, up to and through the Carboniferous, showing how it was possible by a comparison of the fossil fauna of each era to map out the shallow seas and the land barriers then existing, and also to determine the order in which the changes took place, and from whence new fossil types were derived. THURSDAY, June 27, I9OI. The general meeting of the Wisconsin Natural History Society for June was held in the usual place—the Museum lecture room— President Teller occupying the chair. C. E. Brown read reports of section meetings held during the month, and he also stated that the botanists of the society had recently added many new plants and species of fungi to the Museum collections. Mr. William Riley was elected a member of the society. The election of Mr. Edw. E. Voss as director of the section of ornithology was approved. The attendance was 24. Chas. E. Brown then read a paper entitled, “Types and Dis- tribution of Grooved Stone Axes.” It was shown how, accord- ing to the peculiarities of the handle-groove, they could be ar- ranged into three main divisions: (1) Those having only a notch in each opposite side of the axe; (2) those with a groove extend- ing around three sides; (3) those in which the groove completely encircled it. These could again be divided into several sub-classes according to the position and number of the grooves or the general shape or ornamentation of the axes themselves. Drawings were exhibited. of specimens belonging to each class and the material, possible uses, and occurrence of these axes throughout the state discussed. This paper was followed by a lecture by E. Bruncken on “Ecology,” in which the general principles of this recently de- veloped branch of botany were stated and explained, and applied to many of our local species of plants. Mr. Herman Pereles of the Numismatic section then read an instructive paper entitled. “Jackson Tokens and Hard Times Money.” He described the financial and political conditions that led to the issuing of these interesting series of coins, as well as many of the coins themselves in detail. Dr. S. Graenicher next read a paper entitled, “Flowers Adapt- ed to Carrion-Fly Visitors,” which dealt principally with the fer- tilization of our three local species of Smilax, S. herbacea, S. hispida and S. ecirrhata, specimens of which and of their insect visitors were exhibited by the speaker. 14 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 2. NO, 1. A valuable collection of coins belonging to Mr. Altenberg was examined with much interest by those present. ‘The expenditure connected with the holding of a State Archeological meeting was authorized by the society, after which the meeting was adjourned. THURSDAY, SEPTEMBER 26, IQOI. At this meeting, which was attended by 26 persons, President Teller brought the matter of the society’s library to the attention of those present, stating that the documents relating to the trans- fer of the books to the Public Museum had been lost, and that while the Trustees of that institution had expressed their willing- ness to have the library properly catalogued and put in charge of a competent person, they did not see their way clear to do so while the ownership of the books remained in doubt. The subject was discussed at some length by E. Bruncken, Dr. Stanhope and Chas. Doerflinger, after which a committee consist- ing of Messrs. Peckham, Monroe, West and Bennetts was ap- pointed by the President to confer with the Museum Board and to look after the society’s interest in this matter. C. E. Brown then briefly reported concerning the section meet- ings that had been held since the last general meeting of June 27, after which the first paper of the evening was read by Chas. Doer- flinger, whose subject was “The Prehistoric Exhibit at the Paris Exposition of 1900.” He described especially the excellent repro- ductions of the rock pictures from the walls of caves that had recently been discovered in Southern France, those of the cave “Pair-non-Pair,” near Bourg sur Gironde, being of unusual inter- est; and also drew attention to the value added to the exhib’ts by the numerous books of reference that accompanied them and that were accessible to all visitors. The adoption of some similar plan by our Public Museum was suggested in the paper. Adolf Biersach followed with a paper on the habits of the common toad, which consisted largely in a defence of this useful little animal against the evil reputation that the superstition and ignorance of the people had conferred upon it. At this meeting twenty persons were elected to membership as follows: E. R. Buckley, of Rolla, Missouri; Horace Reach, Sr., of Prairie du Chien; F. M. Caldwell, Princeton; W. P. Clark, of Milton: Matt Duane, Marshall; Wm. Finger, Milwaukee; Frank B. Faroo, Lake Mills; P. D. Griste, East Troy: Alnhonse Gerend, St. Francis: W. W. Gilman, Boscohel; H. M. Jaycox, Take Mills: Rudolf Kuehne, Shebovgan: Rev. J. G Laurer, Plain: I. H. Lyman, Kenosha; Frank Mueller, Princeton; G. F. Melcher, Woodland; R. L. Porter, Mukwonago; Chas. Slocum, JANUARY, 1902. PROCEEDINGS. 15 M. D., Defiance, Ohio; Geo. Schuette, Manitowoc; C. E. Wood, Mukwonago; H. A. Willard, Mazomanie. Dr. Harlan J. Smith of the American Museum of Natural His- tory was elected an honorary member. THuRSDAY, October 31, I90I. The attendance was twenty-nine at this meeting, which was presided over by President Teller. Chas. E. Brown, the secretary of sections, read the proceedings of a meeting of the Biology section and also of a meeting of the Archeology section, both of which had been held during the past month. He also reported as to the work accomplished during two ex- cursions made into Waukesha County on Sept. 30 and Oct. 21. Ten groups of undescribed mounds and several isolated mounds and earthworks had been surveyed and platted and considerable data collected in regard to the copper and stone implements pecu- liar to the localities. The following were elected to membership: Miss H. B. Mer- rill and Messrs. S. C. Wadmond of Racine; Dr. H. B. Hinsdale of Ann Arbor, Mich.; P. V. Lawson of Menasha, S. D. Mitchell of Ripon, W. H. Canfield of Baraboo, Louis Falge of Reedsville and Herb. J. Johnson, O,. L. Hollister and W. H:. Vogel of Mil- waukee. The committee appointed to look into the matter of transfer- ring the society’s library to the Public Museum then reported through its Chairman, Dr. G. W. Peckham, as follows: “Your committee to whom was referred the question of re- lations between the Natural Historv Society and the Public Mu- seum, have the honor to report as follows: First. Thev believe that in the interests of all concerned the library should he catalogued. Second. That exchanges should be maintained and that where hreaks occur in the series, steps should be taken to make good the missing volumes. Third. That during certain days of each week the library should be open during reasonable hours during the evening. Under the nresent conditions the librarv is inaccessible except to persons so fortunate as to be able to command their own time. “Your committee further believe that if proper arrangements can he made with the Museum Trustees, that there can be no ob- jection to the transfer of the title to the Museum. As an alterna- tive pronosition, and in the event of the Museum not caring to undertake any responsibility in caring for the library, the com- — 16 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY, VOL. 2. NO. 1. mittee suggest that it be transferred to the Public Library of the city, where it would be catalogued and accessible to the public. Respectfully submitted, G. W. PECKHAM, C, E. MONROE, Gy AW WES: B-PELEE: W: J. BENNETTS. ‘Ernest Bruncken then moved that the committee be given full power to make an agreement with the Museum or the Library on the basis of these principles, which motion was seconded and carried. The lecture of the evening was by Dr. Peckham and was en- titled “Some Points in Geographical Distribution.” The speaker illustrated by numerous examples the fact the world could be divided into many life or faunal areas, and that the original explanations given of these, such as, for example, that they depended upon the amount of heat, or that certain resem- blances were due to a former land connection, failed to interpret the facts as they were now known. The modern view is that dis- tribution was brought about by the same natural forces that are to-day in operation, and that those changes that are at work in Geology operate also in Biology. The West India Islands have a warm and tropical climate, but are remarkably destitute of animal life, both of species and indi- viduals, except in the case of introduced species. Geology shows that they have been several times raised and submerged and as many times has life been destroyed and repopulation taken place, doubtless by drift species from the nearest mainland. This theory is supported by the fact that the fauna of Cuba is related to that of North America, while that of Jamaica resembles more nearly that of South America. Prof. E. C. Case, after the lecture, discussed these latter points, showing that any extensive migration from the adjacent continent would be largely prevented by the prevailing winds and currents from the eastward, and that in the case of amphibia it would be prevented by the fact that salt is fatal to most of the species. Mr. W. H. Ellsworth displayed a grooved stone axe from Da- kota which was of unusual shape, being almost entirely spherical. The meeting was then adjourned. WM. J. BENNETTS, Recording Secretary. STUDIES IN PLANT DISTRIBUTION. 47 JANUARY, 1902. BRUNCKEN Studies in Plant Distribution. By ERNEST BRUNCKEN. J. On the Succession of Forest Types in the Vicinity of Milwaukee. In a former paper (Bull. Wis. Nat. History Society, I, page 178) the forest conditions in the vicinity of Milwaukee were con- sidered principally from the economic standpoint. The following pages are an attempt to treat some of the peculiarities of the for- ests of the same region from the standpoint of ecological distri- bution. The forests of the Milwaukee region are almost exclusively of the deciduous, mesophytic type, xerophilous associations being now represented only by the meager remnants of tamarack swamps still lingering here and there. But there is evidence of the former prevalence of xerophytic, principally coniferous asso- ciations; and within the mesophytic association a number of dis- tinct groups of more or less pronounced mesophily can be clearly distinguished. Between these sub-associations a vigorous con- test is carried on, so that there are numerous transition stages. The mesophytic association may be conveniently divided into three sub-associations, according to the degree of mesophily ex- hibited in the species of which they are most prevalently com- posed. These sub-associations are: 1. The hemi-xerophytic sub-association. Its characteristic species are various oaks, particularly the white and burr oaks; the shell-bark hickory and the black cherry. 2. The mesophytic sub-association, with the basswood, the hard maple, and in a part of the region the beech (1) as its most characteristic members. The hemi-hydrophytic sub-association, in which various elms, black ash and cotton wood are leading species. The first of these sub-associations is probably the most widely spread in the region. It is characterized by the great light de- mand of the trees composing it. In addition to the species men- tioned, we find in this sub-association Quercus rubra and tincto- ria, Ostrya Virginica, Populus tremuloides and grandidentata Hicoria ovata and glabra. The underbrush shows, in addition to the young seedlings and saplings of the trees, several shrubs with xerophytic characters, such as various species of Ribes, haz- (1) On the peculiarities of distribution of the beech, see Wis. N.H.S. Bulletin, I, page 33. pe 18 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 2. NO, . elnut and witch hazel. In places there are thickets of Rubus, and Xanthoxylum is not uncommon. The herbaceous flora is rich, both in species and individuals, and golden rod, punnowen and asters find here their favorite habitat. The second sub-association is characterized by the great shade tolerance of some of its members, and probably as a consequence of the deep shade prevailing in its midst, by the thick layer of humus found on the floor. In addition to the hard maple and basswood, there belong to this association the butternut, the black walnut (now rare), and the white ash. The underbrush is apt to be less dense than the preceding class, and often confined to the places where the canopy has been broken. It is composed largely of the same shrubs that are found in the preceding sub-association, except that the hazelnut is not likely to be found, and that Sam- bucus mgra may be added. The herbaceous vegetation is apt to be scanty, especially in summer, when the crowns are fully leaved. Often the dry leaves monopolize the floor almost entirely. Among the herbs most often accompanying this association should be men- tioned Podophyllum peltatum, Viola scabriuscula, Trillium grand- iforum, and two species of Erythronium. This sub-association rarely occupies large areas; it is usually found in the form of islands among the surrounding sea of the hemi-xerophytes. Often it inhabits damp ravines, where the ac- cumulation of humus is assisted by washing from the sides. As the two associations are still in the fighting stage, neither is very firmly established in any particular locality. Consequently it is by no means uncommon to find individuals belonging to the one sub-association scattered among the other. But in those places where there has been no modification by human interference such as will be described below, this difference is quite noticeable: The hemi-xerophytic trees scattered among the maple-basswood sub- association are usually old, often veterans in a state of evident de- — cay; on the other hand, where maples, basswood and their associ- ates are found among the oaks and hickories, they are more often young trees. This phenomenon will throw considerable light on the history of these forests, and should be borne in mind for the discussion which will follow below. The hemi-hydrophytic sub-association may again be divided into a double group, according as it is found in the swampy de- pressions of the uplands or in the river bottoms. The difference is not so much in the species as in the way in which they are asso- ciated. In the upland swamps(2)Ulmus Americana and Frax- (2) These swamps are usually fairly well drained, dry after about the first of July, and very distinct from the tamarack swamps. Their center is usually i in eb open water, in part occupied by the swamp loving shrubs mentioned in the ex JANUARY, 1902. BRUNCKEN—STUDIES IN PLANT DISTRIBUTION. 19 inus nigra are by far the most numerous, silver and red maple (3) are interspersed very sparingly, Ulnius fulva a little more ire- quently, and Quercus bicolor is common. The underbrush con- sists of many species of Salix, Cornus, Viburnum, etc. Creepers, such as Ampelopsis, Lonicera, Smilax are characteristic of this as well as the second group of this sub-association, while they are practically unknown in the other forest associations (with the exception of Evonymus). The soil is probably sour in not a few cases, as would be indicated by the rich development of swamp- loving mosses, Cyperaceae, etc. Phanerogamic herbs growing under the shade of the trees mostly have some xerophytic charac- ters (Viola blanda and Labradorica, Majanthemum Canadense, etc.), in sharp contrast to the hydrophytic flora towards the middle of the swamps. . The second group of the hemi-hydrophytic sub-association, the bottom woods, has been more disastrously affected by human ac- tivity than any other portion of the forests of the region, except the tamarack association. “There can be little doubt that previous to the settlement of the country this group occupied the entire val- leys of the Milwaukee, Menomonee and Kinnickinnic Rivers with the exception of the sedge and wild rice marshes at their mouth, and perhaps isolated patches of tamarack swamp and hydrophytic shrubbery. To-day a few small remnants is all that is left of the bottom forest, such as the grove near the junction of Honey Creek and the Menomonee. On the pastures which now form the largest part of the river valleys, there are scattered a good many groups and individual trees, some of them in full vigor, others in various stages of decay, stag-headed and hollow-boled. From these rem- nants, however, it is possible to draw a mental picture of what these woods must have looked like when they were in their pris- tine glory. Three species of elm (Ulmus Americana, fulva and racemosa) seem to have furnished the most numerous host; as- sociated with them were Celtis occidentalis, which now remains only in comparatively few individuals, the largest group known to the writer growing near the County Insane Asylum, Quercus bi- color, Acer dasycarpum, Acer Negundo, Populus deltoides, Frax- mus nigra, Salix amygdaloides. The trees in this group seem to have grown to very great dimensions, if one may judge from the giants which still remain. Creepers of the species mentioned above were abundant. It is probable that the forest was interrupted by considerable areas covered with shrubs. Such thickets have again come up in many places since the original growth was destroyed. (3) Young red maple trees are occasionally found among young growths of hard maple, away from the proximity of swamps. 20 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 2. NO. 1. They cannot properly be classed with forest associations, but must be considered as a distinct formation, and will not be considered here in detail. The remnants of the bottom wood group are in evident course of extinction. The old trees are gradually dying or being removed by the axe. Windfalls are exceedingly common in the thinned stands of elm. The young trees that are coming up are as apt to be hard maples and other trees from the mesophytic uplands as the progeny of the original occupants. Having thus briefly described the three mesophytic forest sub- associations of the region, the question arises as to their history. The hemi-hydrophytic sub-association is evidently conditioned directly by the physiography of the country. But the other two seem to’ be far more directly the result of the struggle for life among species. To understand the mutual relations of these two types of forest it is necessary to throw a glance at a somewhat wider region than that under immediate consideration. The vegetation map of Eastern Wisconsin, accompanying the first Geological Survey of the State, shows that there is a broad belt to the west of Milwau- kee County, which is there denominated the Oak Group. To the east of this is a strip classified as the Oak and Maple Group, and still farther east comes the Maple and Beech Group. A visit to the forest anywhere within the Oak Group will show that various. species of oak are almost the only trees found there. Their only associates are the hickories, only in some places the black cherry is found. These are precisely the species which have been mentioned as the characteristic ones of the hemi-xerophytic sub-association. Perhaps it is possible to divide even this sub-association into seve- ral groups of more or less highly developed xerophily. At all events, the white and burr oak seem to have more pronounced xerophytic characters than the red and black oaks, and it is well known that groves of stunted burr oaks are not uncommon as far West as South Dakota, where conditions are decidedly xerophytic. A closer study of the oak forests will show that here and there, usually in a deep ravine or in the neighborhood of a lake or water course, there are a few individuals of basswood. The vicinity of such trees is usually distinguished also by the occurrence of strongly mesophytic herbs, such as Podophyllum peltatum, which are uncommon in the purely oak forests. Sometimes one will.no- tice that the basswood and its minor companions grow exclusively on the southerly side of a ravine, while they are entirely absent on the northerly side. One remembers that these locations receive less sunlight than the northerly slopes. Their greater shade and consequently damp and cool condition retards the oxydization of JANUARY, 1902. BRUNCKEN—STUDIES IN PLANT DISTRIBUTION. 21 the vegetable mould, and in such places the humus is deeper and richer than is usual in the oak woods, with their insufficient shade. As one travels eastward, the maple makes its appearance, at first sparingly and confined to such localities as have just been de- scribed. By the time one is fairly within the territory of the Oak and Maple Group of the map, maples and basswood and their asso- ciated trees mentioned above occur with growing frequency on the ordinary uplands a well as in ravines and coves. Going still far- ther east, and coming within two or three miles of Lake Michigan, one begins to find the beech, the tree which of all trees of the re- gion throws the densest shade and grows in the places with the deepest and richest humus. This geographical arrangement suggests that its cause is the amount of humus required for the various species. The oaks and their associates demand the least of it. The basswood comes next, while maples and beeches demand the richest soil. It might be supposed that the distribution of these trees is determined by the mineralogical character of the soil on which they grow. But this is negatived by a comparison of the vegetation map and the soil map found in the Geological Survey atlas. From this it appears that maples and beeches are found indiscriminately on “heavy marly clay,” “lighter marly clay,” “calcareous sand” and “red clay”; while the oak forests, although mostly on “lighter marly clay,” are by no means confined to that soil formation. Although sufficient sunshine reaches the forest floor under an oak canopy to cause comparatively rapid oxydization of the vege- table mould, that process is not rapid enough to prevent the slow accumulation of humus even in an oak forest. It is conse- quently a mere question of time until there will be sufficient humus in all the oak woods to satisfy even the hard maple. But as soon as the maple has gained a foothold it prevents by its dense shade the growth of oak seedlings, while its own seedlings, with their remarkable shade tolerance, can flourish well enough. At the same time it gives a great impetus to the further accumulation of humus. In the course of ages, therefore, with no new factor en- tering into the process, the maple and its associates would supplant the oak and its accompanying species everywhere in this region. The maple-basswood-beech sub-association is consequently the culmination type of forest in this locality. It is safe to assume that at one time Milwaukee County was covered by almost pure oak forests (with the qualification to be discussed forthwith), such aS are now struggling with the prairie formation in the Rock River valley and the country immediately to the east of that. The further question presents itself: Why are the maples, 22 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 2. NO. 1. basswood and beeches somuch better developed in the neighborhood of Lake Michigan than they are twenty or thirty miles inland? The hypothetical answer which suggests itself is that the nearness of so large a body of water has a modifying influence on the hy- gricity and temperature relations of the climate, by which the ac- cumulation of humus in the oak forests is favored by retarding of oxydization. The correctness of this hypothesis can be determined by nothing except numerous and long-continued meteorological observations in various localities. Such data are not in existence, and there is no prospect that the gathering of them will be com- menced in the near future. The culmination type of forest has not been reached in this vicinity anywhere except in small, isolated, specially favored areas. By far the greater part of the territory is in a transition stage, presenting neither the purely mesophytic nor the hemi-xero- phytic character. On the whole it is probably easier to find areas decidedly of the latter kind than of the former. It is apparent, then, that the course of development from the oak forest through the various trans‘tion stages to the basswood-maple-beech, or per- haps eventually to the pure maple forest, has not yet become completed. Perhaps it would be more correct to say: Had not been com- pleted when the settlement of the region brought in a new factor of the greatest modifying power. Not only was the greater part of the territory wholly deprived of its forest cover by human hands, but the remaining tracts of forest were cut up into small parcels, of sizes ranging up to about a hundred acres, but usually much smaller. This reduction alone would probably be suff- cient, by allowing the better access of wind to the forest floor, to make the conditions more xerophytic, especially as the edges of the tracts are rarely protected against the drying influence of the wind by a mantle of shrubs. But in addition a great many trees have been culled from the forest everywhere, so that frequently the crown cover is very much broken and the sunshine has full access. This of course increases the rate of oxydization of the humus and prevents its accumulation to a great degree. The floor in such places is often covered w‘th a dense growth of grasses. All these factors tend to reverse the natural progress towards the purely mesophytic sub-association. It is quite notice- able that taking the region as a whole the oaks are on the increase. In many places, especially where there is much grass, oaks are practically the only young trees to be found. However, there are isolated tracts here and there, on which, through accident probably more often than design, the maple has JANUARY, 1902. BRUNCKEN—STUDIES IN PLANT DISTRIBUTION. 93 been favored. This has occurred where the culling has been mod- erate, so that the shade on the floor remained too dense to allow the growth of the intolerant oaks. Thus there is a considerable tract in the town of Wauwatosa, which is now an almost pure maple wood with the young trees ranging in age from the last year’s seedling up to good-sized poles. The few standards re- maining are in about equal numbers oaks and maples, but oak seedlings are entirely absent. The floor is almost bare of vegeta- tion and the humus deep and rich. Similar places are found scattered in many parts of the country. It was stated in the beginning of this article that there was evidence of this region having been clothed at one time with a xerophytic forest, mostly composed of conifers. This proposition remains to be discussed. A glance at the vegetation map shows that to the north of Milwaukee County the Oak and Oak and Maple Groups are re- placed by two quite dissimilar types of forest. In one of these the white pine is prevalent; this group stretches along the Lake Shore in a strip that gradually narrows as it comes South. The other type is characterized by the prevalence of hard maple, yellow birch and hemlock, and the almost complete absence of oak. This is the association which covers such large areas in the central part of Northern Wisconsin (4). Of both these associations relicts are not infrequently found in the neighborhood of Milwaukee, thus indicating that they must once have been represented in this region. The white pine association has for its most characteristic com- panion tree the paper birch. This tree ‘s still common in a very narrow strip along the shore of Lake Michigan. The white pine itself formerly occurred in the same narrow strip, but the last large specimens seem to have disappeared a few years ago. It is said that a few very small individuals are still growing in a ravine near Fox Point. Going south, from Milwaukee, the white pine re-occurs on sandy beaches and on the dunes near Chicago. The paper birch is very well developed in several places along the Lake Shore, to the South, conspicuously so on the broad and swampy land flat north of Waukegan, Ills. Small species usually accompanying this association, such as Pteris aquilina, are found sparingly in the paper birch strip, although they are entirely absent everywhere else in our territory. The conclusion can hardly be avoided that the white pine areas of the North and the Southern (4) See Roth, Forest Conditions of Northern Wisconsin. 24 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 2. NO. 1. end of the Lake were formerly connected by a strip along the Lake Shore (5). The signs that the maple-yellow birch-hemlock association was ever present in this neighborhood are not quite so convincing as those of the white pine association. The only direct evidence discovered so far is the occurrence of Betula lutea in this neigh- borhood (see Bull. Wis. Natural History Soc., I, page 31). But there is good theoretical ground for assuming such a stage in the history of our torest. For in the regions to the Northward, the white pine association is normally succeeded by this or similar as- sociations, the development proceeding from the interior to the shore (6). The white pine association is of course typically xerophytic; the only other xerophytic forests found in our region are the tamarack swamps, which were formerly quite extensive but have now almost disappeared, principally through the direct activity of man. The result of this inquiry into the history of the forests of the Milwaukee region is the following: The earliest forests of which we can find any trace belongs to the xerophytic white pine association. It was probably succeeded more or less completely by a forest similar to the hardwood forests of Central Northern Wisconsin, in which maples, yellow birches, and perhaps hemlock played a leading part. Whether this group ever occupied the whole area not reserved to the white pine asso- ciation, or whether in some places the pines were directly sup- planted by the oaks that must have invaded the territory from the Southwest, it is now impossible to tell. Nor is there any clear evidence to show what caused the birches to disappear. It is cer- tain that the oaks successfully conquered the whole territory ex- cepting the swamp lands and river bottoms, which developed dis- tinct associations. What gave the oaks their temporary advantage over the maples and birches we do not know. After a while the maples, but not the birches, began to reconquer the lost ground, and the forests progressed towards a basswood-maple-beech cul- mination type, when the interference of man gave a renewed ad- vantage to the oaks. Il, Contributions to the Ecology of the Genus Viola. The fact that a large number of plants growing in undrained swamps have numerous xerophytic characters is well known. (5) The immediate shore of Lake Michigan, i. e. the beach, terraces, clay banks and ravines, have so distinct and peculiar a flora that they deserve separate treatment, which must be reserved to a later time. (6) See H. N. Whitford, Genetic Development of the Forests of Northern Michigan, Botanical Gazette, vol. 31; May, 1901. JANUARY, 1902. BRUNCKEN—STUDIES IN PLANT DISTRIBUTION. 25 Various suggestions have been made to explain this phenomenon, which is so surprising when first encountered (7), but hitherto these suggestions have not ripened into more than plausible hy- potheses. The following observations may furnish some material towards an ultimate solution of the problem: The genus Viola is represented by seven species in the near neighborhood of Milwaukee, and by at least four others in other parts of Eastern Wisconsin. These species form an illustrative series in which xerophytic characters increase as one departs from those growing in typically mesophytic places to either those species inhabiting dry hillsides or wet and boggy situations. The species forming the mesophytic center is V. scabriuscula. It has hardly anything suggestive of a protection against excessive transpira- tion, with its broad leaves, juicy stems, light green color and al- most complete absence of pubescence. This species flourishes in the shadiest portions of our mesophytic forests, under the hard maples and beeches, where the humus is deepest and yet the drain- age sufficient to prevent the formation of deleterious acids. Very similar to this species both in habit and habitat is V. Canadensis, which does not occur in Milwaukee Cotinty but is fairly common farther North. The next species in regard to slight development of xerophytic characters is V. pubescens. The name of this species is by no means suggestive of its general appearance, for while one can find individuals with a fairly conspicuous coat of hair, there are others almost as naked as V. scabriuscula. The seed pod is an exception, for this organ is invariably covered with a very close coat of hair. This species is also found principally in the meso- phytic forest, but it is not so closely confined to the beech and maple groups as scabriuscula. It is quite satished with the ordi- nary type, where oak, hickory, cherry and other trees compete with the maple, where the shade is less dense and the humus does not reach the same thickness and richness. Viola obliqua and the tather rare V. ovata come next. They are not absent from the forests where ’. pubescens has its favorite stations, but far more characteristic of thickets of shrubs and saplings, where there is still a reasonable amount of humus. They are also found in the vigorous grass of meadows, and in the willow brush along the rivers. In at least one place I have found Viola obliqua growing . copiously in a small sedge marsh. Both of these species have a few xerophytic characters, the most conspicuous of which is the rolling in of the leaf edges. (This also occurs sometimes in V. pubes- cens). By this the stomata of the upper leaf surface are protected from the wind. (7) See Warming, Oekologische Pflanzen-Geographie, German ed., page 69. 26 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 2. NO. 1. All the species mentioned so far one would not think of class- ing otherwise than as mesophytes. The next one, however, is quite distinctly xerophytic, although not extremely so. This is V. sororia, a species very similar to V. obliqwa, but distinguished by the pronounced hirsuteness of the green parts. It is perhaps the commonest species in this neighborhood, and invarably occupies dry localities, such as sunny hillsides or the hawthorn scrub lands. Hardly ever does one find this and its cousin, V. obliqua, interming- ling, although it is common to see the latter flourish at the foot of a hill, where the ground is fairly moist and the insolation mod- erate, while the adjacent slope, dry and exposed to hot sunlight, shows numerous plants ot . sororia. Stations similar to those occupied by this species are pre-empted by:V’. pedata in many places a little farther west, for instance on deforested slopes of the Kettle’ Range. The division of the leaves in this species seem to be a xerophytic adaptation, serving a similar purpose as the hirsuteness of V. sororia. In some places, e. g. near the Lake Shore in section 36, Town of Oak Creek, the last named species shares its dry habitat with Viola Labradorica. Byt more often that species is found in the damp, almost swampy places in the forest, where elm, black ash and red maple indicate the great moisture content of the soil. Here the ground is often largely occupied by mosses, and among these the low, much-branch‘ng plants, with their tangle of thin, super- ficial roots and little pale flowers are found. The habit of this species forms a striking contrast to that of its mesophytic cousins, like V. Scabriuscula or Canadensis. Where it grows copiously, it forms carpets on the ground, and might almost be called cespitose. In its neighborhood in such damp, mossy localities one is quite apt to find also the smallest of our violets, V. blanda. Both of these species are distinguished for their small size. But the pecu- liarity of VY. Labradorica which is most interesting in the present connection is that it seems to flourish equally well in decidedly dry and pronouncedly wet situations. V. Labradorica is closely allied to the European ’. canina, in fact so closely that some tax- onomists will give it only varietal rank. (V. canina Muehlen- bergu.) Now the European form is found in very dry localities, such as gravel slopes where the dominant vegetation consists of xerophilous grasses like Festuca ovina, or among the heather. There must be something in common between the two apparently so very different stations in which Viola Labradorica is found, and that common quality must be something which favors xero- phytic adaptations. For the low growth and semi-cespitose habit of this species is a fairly pronounced indication of xerophily. JANUARY, 1902. BRUNCKEN—STUDIES IN PLANT DISTRIBUTION. 27 It seems to me that the similarity consists in this: In the dry places, especially the gravelly, strongly insolated slopes, there is very little humus. What little there may be found is some- times sour or “raw’’; in fact the dense tangle which roots often form in such localities is well known for its tendency to produce sourness by hindering aeration. Similar sour humus is found in the wet, swampy forests. Sour humus makes it more difficult for the roots to absorb moisture, and consequently it becomes neces- sary for the plant to reduce the transpiration. The lack of oxy- gen and assimilable forms of nitrogen in such soils still further induces a weakening of physiological activity. Now the series of Viola species outlined above shows clearly that the number and importance of xerophilous adaptations increases in inverse pro- portion of the presence of fresh, well-aerated humus, from the maple-beech forests to the dry hillsides on the one hand and the boggy elm and black ash forests on the other. Does not this circumstance indicate that there must be some causal connection between the quality of the humus and the occurrence of xerophy- tic characters? It will be noticed, however, that there is a marked difference in the kind of adaptation between the dry and wet xerophytic sta- tions. In the dry localities the most conspicuous feature is hairi- ness and next to it the rolling in of the leaf edge. In the swamp, what one notices most of all is the reduction in size, both of the plant as a whole and the proportion of the various organs of as- similation and transpiration. V. Labradorica is one of the small- est of our violets, both as regards length of stems and breadth of leaves. (The flowers are also smaller than in most other species. ) V. blanda is smaller still. European species in similar stations, like V. palustris, which grows in sphagnum bogs, and V. biflora, which is found in gulches and on rocks where the water is con- stantly dripping, are also among the smallest of violets. On the other hand, lV. sororia does not appear a bit less vigorous and full- sized than its cousin V. obliqua, though the latter has far better advantages as regards humus. It will suggest itself therefore that the plants growing in sour humus have a tendency towards reduction in size, and a glance at other species than those of the genus Viola confirms this impression. Although hairiness is not entirely absent in bog plants, it is uncommon (8); but nearly all such species are dis- tinguished by small leaves. This is true of many Fricaceae, and of conifers, such as tamarack and spruce. In very bad localities, such as sphagnum bogs, the spruce which occasionally grow there (8) See Warming, Op. cit., page 174. 28 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 2. NO. 1. suffer an individual dwarfing, so that such a tree, although but a few feet high, may be a hundred years old. The results which appear to flow from the above observations are the following: 1. The occurrence of more or less xerophytic species of Viola in a given locality depends on the amount and quality of humus in the soil. 2. Scantiness of humus favors specific adaptations for reducing transpiration, but does not diminish the vigor of growth; sourness of the humus tends to produce dwarfishness both of the whole plant and its separate parts. The case of Viola obliqua growing in a sedge marsh, as men- tioned above, does not necessarily militate against the second con- clusion. It is by no means uncommon to find colonies of a species in a station not at all adapted to its growth. But such colonies are apt to be transitory ; the numbers and individual vigor of the mem- bers is likely to diminish with each generation, until they dis- appear. Iam unable to state how long V. obliqua has been in the marsh in question, but it will be interesting to watch its future history. It is probable that it will gradually disappear, unless the marsh should dry up and its soil become less sour; or unless the invaders should develop a variation which would adapt it to the new conditions. JANUARY, 1902. GRAENICHER—FLOWERS ADAPTED TO FLESH-FLIES. 29 Flowers Adapted to Flesh-Flies. By DR. S. GRAENICHER. The flies which are to be considered in the present paper, in regard to their relations to certain flowers, agree more or less in their food-habits, and are members of the families Sarcophagidae, Muscidae and of a few other closely allied families. They are the scavengers among the flies, feeding either in their larval state or as perfect insects on decaying organic matter, but also resorting to flowers in search of honey and pollen. Some of these are popu- larly known as flesh-flies, carrion-flies, dung-flies, etc., according to the nature of the substances to which they usually pay their at- tention. They are guided to these substances by the putrid odor emanating therefrom, and for this reason we might expect any flower, producing a similar odor, to be especially attractive. to them. Delpino has given an account of two species of Stapelia from the Cape of Good Hope, plants belonging to the family As- clepiadaceae, the flowers of which are carrion-scented and are visited by flesh-flies (sapromyiophilous). The Papaw, Asimina triloba, Dunal, a plant well known in this country, especially throughout the Southern States, on account of its edible fruit, produces dark purple flowers which are also sapromyiophilous. From Southern Illinois Robertson (1) has reported the visits of 9 flies to these flowers, seven of which are flesh-flies, or other flies of similar food-habits. At Firenze, in Italy, Delpino observed seven species of flies on the flowers of cultivated specimens of the Papaw. In our surroundings there occur three species of Smilax (fam- ily Smilaceae), two of which, S. ecirrhata and S. herbacea, pro- duce flowers of a disagreeable odor, as the name carrion-flower, given to one of them, implies, while the flowers of the third species, S. Hispida, are sweet-scented. In color and structure of the flowers all three species agree, but they differ essentially in the odor of the flowers. For this reason they furnish a suitable ma- terial for determining the effect of the putrid odor on the various types of flower-visiting insects. Besides these two sapromyiophilous species of Smilax, a third plant is represented in our flora with flowers of an offensive odor, and of a dark purple color besides. This is Euonymus atropurpur- eus, the Waahoo, a member of the family Celastraceae, and it will (1) Chas. Robertson, Flowers and Insects, Trans. Acad. Sc. St. Louis, Vol. VII, No. 6, pp. 154-5. 30 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 2. No. 1. be considered in the course of this paper, with the same points in view as in the case of the Smilax-species. The flowers of the latter have a greenish color. In a paper on the pollination of the greenish-yellow flowers of plants belonging to the genera Caulophyllum, Ptelea, Rhamnus, Rhus and Sassa- fras, Robertson (2) reviews the opinions held by various authors on the effect of the greenish color of the flowers on the insect- visitors. According to Delpino and Herm. Mueller, such flowers are very attractive to the larger flies (macromyiophilous), but the observations of Robertson show a distinct predominance of the flies in one species only, in Sassafras officinale, Nees, while in the remaining species (with the exception of Caulophyllum thalic- troides (L.) Michx.), the lower bees, Andrenidae are the leading visitors. Of the dark colored flowers, such as are present in our Waahoo, (Euonymus atropurpureus) Delpino and Herm. Muel- ler express the view that they are visited mostly by flesh-flies (sapromyiophilous). As will be shown later on, the observations made on the Waahoo do not support this view. SMILAX L. The plants are dioecious, and produce simple flowers, which, in our own three species, present a very slight variation in struc- ture, size and color. The staminate, as also the pistillate flowers, are gathered in axillary umbels and have a greenish-yellow color. In the staminate flowers the perianth-segments and stamens are present to the number of six, rarely of eight, and honey is se- creted around the base of the filaments, as also along the inner surface of the perianth-segments. ‘The pistillate flower has the same number of perianth-segments as the staminate, and contains an egg-shaped ovary, crowned with a three- or rarely a four- parted stigma. In addition to these parts it has abortive stamens, consisting of small filaments without anthers, which are appressed to the ovary, and never spread, as they do in the staminate flow- ers. The secretion of honey around the base of the ovary, and on the inner surface of the perianth-segments, is about the same as in the stam:nate flowers. The abundant whitish pollen of the stam- inate flowers renders the latter more conspicuous than the pistil- late flowers, in which all the parts are of a greenish color. The characters mentioned above are those common to all three of our species. (2) Chas. Robertson, Flowers and Insects, XVII, Bot. Gaz., Vol. X XII (1896), pp. 154-165. JANUARY, 1902. GRAENICHER—FLOWERS ADAPTED TO FLESH-FLIES. 31 SMILAX ECIRRHATA, S. WATS. UPRIGHT SMILAX. This is our earliest Smilax, blooming from May roth to June 12th. The stems grow upright, varying in height between six and nine dm., and producing long-stalked axillary umbels, with numerous erect flowers of one cm. diameter. In the older flowers the lanceolate perianth-segments are somewhat reflexed. The staminate and pistillate flowers of plants, growing under the same conditions, open at about the same time. ‘The stamens are strongly divergent, and all) the anthers of the same flower shed their pollen synchronously. In the pistillate flower the abortive stamens are represented by four to six thin, poorly developed fila- ments, while the stigmatic lobes are comparatively large, and covered with numerous papillae. Nectar is secreted abundantly by both kinds of flowers, although in fine weather the flowers are mostly found with hardly any nectar, the supply having been ex- hausted by the very numerous insect-visitors. The putrid odor of the flowers, staminate as well as pistillate, is very distinct and miay be likened to the smell of decomposing cheese. Smilax ecirrhata presents a case of trioecism. Besides plants bearing either staminate or pistillate flowers, specimens are found with perfect (hermaphrodite) flowers exclusively. Such plants have appeared regularly for the last three seasons in a piece of woodland near the northern limits of Milwaukee, in Mineral Spring park. These perfect flowers are homogamous. Their ant- hers and ovaries are not as well developed, as is the case in the staminate and pistillate flowers, but they nevertheless furnish nor- mal pollen and produce fruit. Trioecism has not yet been ob- served in any of our other species of Smilax. On different days within the last four years, the following vis- itors have been taken on the flowers of Smilax ecirrhata: A. Hymenoptera. | Andrenidae: (1) Andrena, sp. 9, c. p.;* (2) Augochlora vividula, Sm. 9,s. and c. p.; (3) Halictus fasciatus, Nyl., 2 ¢. p.; (4) H. fulvipes, Sm. 9, s. and c. p. b. Diptera. Tipulidae: (5) Tipula graphica, Doane; Syrphidae: (6) Mesogramma geminata, Say; Tachinidae: (7) Gonia capitata, DeG.; Muscidae: (8) Hemichlora sp.; (9) Pollenia rudis, Fabr.; (10) Callibhora erythrocephala, Meig.; (11 ) C. vomi- ‘toria, L.; (12) Phormia regina, Meig.; (13) P. terrae-novae, Desv.; (14) Lucila sylvarum, Meig.; (15) L. caesar, L.; (16) L. s Ys 9 Worker; ¢ Male; ? Female; s Sucking; c p Collecting Pollen; f p Feeding on ollen. 32 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 2. No. 1. sericata, Meig.; (17) L. splendida, Meig.; (18) Pseudopyrelha cornicina, Fabr.; (19) Morellia micans, Meig.; (20) Myospila meditabunda, Fabr.; (21) Clinopera sp.; Sarcophagidae: (22) Helicobia helicis, Town.; (23-28) Helicobia spp.; (29) Sarcoph- aga sarraceniae, Riley; (30-32) Sarcophaga spp.; Anthomyidae: (33) Drymeia sp.; (34) Ophyra sp.; (35) Phorbia fusciceps, Zett.; (36-37) Phorbia spp.; Scatomyzidae: (38) Scatophaga squalida, Meig.; Ortalidae: (39) Rivellia favimana, Loew; (40) Chaetopsis aenea, Wied.; Sepsidae: (41) Sepsis wiolacea, Meig.; (42) Piophila casei, L.; Oscinidae: (43) Chlorops grata, Loew; (44) C. assimilis, Macq.; Borboridae: (45) Bor- borus equinus, Fall. ;—all s. or f. p. C. Coleoptera. Elateridae: (46) Cardiophorus obscurus, Lec:; Malachiidae: (47) Malachius montanus, Lec.; (48) M. thevenetu, Horn; Cerambycidae: (49) Leptura lineola, Say; (50) Acmaeops biv- ittata, Say; Chrysomelidae: (51) Orsodachna atra, Ahr.; An- thicidae: (52) Corphyra lugubris, Say—all s. D. Hemiptera. Pentatomidae: (53) Corimelaena lateralis, Fabr. s. Before drawing any conclusions from this list of visitors, it may seem advisable to first consider our other species of Smilax and then compare the results obtained. SMILAX HERBACEA, L. CARRION-FLOWER. The flowering season of this species is a continuation of that of the preceding species and extends from June t1oth to July 13th. As a rule the plants attain a greater size than those of S. ecir- rhata, growing to a height of 2 m. and sending off a number of branches. Besides this is a climbing species, another feature sep- arating it from S. ecirrhata. As regards the flowers, they agree so closely with those of the preceding species, that a description of them may seem superfluous. Occasionally an umbel contains as many as eighty flowers, in which case it has a globular form. Although disagreeable, the odor of these flowers is decidedly less putrid than that of the flowers of S. ecirrhata; it is a peculiar odor, reminding somewhat of rotten fruit. The following list of visitors has been obtained through re- peated observations during the last four seasons: A. Hymeneptera. | Andrenidae: (1) Andrena rugosa, Rob. 9, s. and c. p.; (2) Augochlora vividula, Sm. 9,s.andc.p.; (3) Agapostemon vadiatus, Say.,@, c. p.; (4) Halictus confusus, Sm. Qs. and c.p.; (5) H. inconspicuus, Sm. 9, cc. p.; (6) H. fulvipes, Sm.. JANUARY, 1902. GRAENICHER—FLOWERS ADAPTED TO FLESII-FLIES. Do @,¢. p.; Eumenidae: (7) Odynerus tigris, Sauss., s.; Ichneu- monidae: (8) Tryphon seminiger, Cress. s.; (9) Campoplex dissitus, Nort. s.; (10) Cryptus sp., Ss. B:< eptera: Culicidae: (11) Culex stimulans, Walk.; Syrphidae: (12) Mesogramma geminata, Say; Muscidae: (13) Pollenia rudts, Fabr.; (14) Calliphora vomitoria, L.; | (15) Phormia regina, Meig.; (16) P. terrae-novae, Desv.; (17) Lucila sylvarum, Meig.; (18) L. caesar, L.; (19) L. sericata, Meig.; (20) Pseu- dopyrellia cornicina, Fabr.; (21-22) Clinopera spp.; Sarcoph- agidae: (23) Helicobia helicis, Town.; (24-26) Helicobia spp.,; (27) Sarcophaga sarracemae, Riley; (28-33) Sarcophaga spp.; Dexiidae: (34) Myocera cremides, Walk.; Anthomy:dae: (35) Phorbia fusciceps, Zett.; (36) Leucomelina garrula, Gig.—Tos.; Sapromyzidae: (37) Lonchaea polita, Say; (38) Sapromyza lupulina, Fabr.; (39) Sapromyza sp.; Ortalidae: (40) Rivel- ha pallida, Loew,—all s. or f. p. C. Lepidoptera. ‘ Rhopalocera: (41) Neonympha eurytus, F. s.; J, Coleoptera. _ Cerambycidae: (42) Acmaeops atra, Lec.;-(43) A. bivittata, Say; (44) Cyrtophorus verrucosus, Oliv.; (45) Euderces pi- copes, Fabr.; Mordellidae: (46) Mordella sp.; Anthicidae: (47) Corphyra collaris, Say; (48) C. lugubris, Say—all s. E. Hemiptera. Capsidae: (49) Lygus pratensis, L.; (50) Poectlocapsus lineatus, Fabr.; (51-52) spp.—all s. SMILAX HISPIDA, MUHL. GREENBRIER. The main factor separating this from the two species consid- ered above is the sweet scent of :ts flowers. These are open from June 5 to June 28, they bloom together w:th the late flowers of S. ecirrhata and with the flowers of S. herbacea during the first half of the latter’s flowering season. S. hispida is a climbing species, and produces plants Io to 12 dm. high with pendulous flowers. The number of flowers forming an umbel is small, on an average not exceeding fifteen, and on this account the umbels are less conspicuous than those of the other species. In 1899 and 1900 the following insects were taken on the flowers : . A. Hymenoptera. Nomadidae: (1) Nomada maculata, Cress 2, s.; (2) N. americana, Kirby, 92, s.; Andrenidae: (3) Andrena forbesii, Rob. 2, 8.3; (4) A. rugosa, Rob. 9, s.; (5) Andrena sp. 3, s.; (6) Agapostemon radiatus, Say,?; s.; (7) Halictus coria- 34 BULLETIN OF WISCONSIN NATURAL HISTORY SOCIETY. VOL. 2. NO. 1. ceus, Sm. 9,8.; (8) H. forbesu, Rob. 9,s.; (9) H. 4 macu- laius,-Rob: 2 ,'s. and-c: py; (10) Ae, fuloipes, Si?) 6-3 ae Sphecodes dichroa, Sm. 9, s.; (12) S. confertus, Say, $ 8.; Prosopidae: (13) Prosopis modesta, Say, 2, s.; Eumenidae: (14) Odynerus foraminatus, Sauss., s.; (15) O. tigris, Sauss. s.; Sphegidae: (16) Ammophila vulgaris, Cress., s.; Ichneu- monidae: (17) Tryphon sp. s.; Evaniidae: (18) Gasteruption incerium, Cress., s. B. Diptera. Culicidae: (19) Culex stimulans, Walk.; Syrphidae: (20) Syrphus ribesti, L.; (21) Allograpta obliqua, Say; (22) Meso- gramma geminata, Say; (23) Helophilus similis, Macq.; Tach- inidae: (24) Siphona geniculata, DeG.; Muscidae: (25) Pol- lenia rudis, Fabr.; (26)-Luctha sylvarum, Meig.; - (27) L. caesar, L.; Sarcophagidae: (28) Helicobia helicis, Town.; (29) Sarcophaga, sp.; Anthomyidae: (30) Phorbia fusciceps, Zett.; (31) Coenosia sp.; Scatomyzidae: (32) Scatophaga squalida, Meig.; Sapromyzidae: (33) Lonchaea polita, Say; (34) Sap- romyza lupulina, Fabr.; (35) S. quadrilineata, Loew; Sepsidae: (36) Sepsis violacea, Meig.; Oscinidae: (37) Meromyzsa ameri- cana, Fitch; Agromyzidae: (38) Agromyza jucunda, v. d. W., —all s. or f. p. C. ‘Coleoptera. Anthicidae: (39) Corphyra collaris, Say, s. D. Hemiptera. Capsidae: (40) Lygus pratensis, L. s. In the following table the results obtained from our three species of Smilax are brought together. | Eee dig). CE pe Ss PT ae, fs) ‘¢ she (8) 4) a. HYMENOPTERA... Higher bees...............cesesseeesees ae oa ste (Rael vee eee 2 TiG@ Wer NCGS... in... cay ea ee 4) 6/11 Other Hymenoptera....... qe ngdi i swapns waacupieet a Wie ee eoe Mie 4| 5 DIPTERA;