THE LIBRARY OF THE UNIVERSITY OF CALIFORNIA LOS ANGELES No. 38 — JULY, 1905 DEPARTMENT OF THE INTERIOR BUREAU OF GOVERNMENT LABORATORIES THE POLYPODIACEAE OF THE PHILIPPINE ISLANDS II. NEW SPECIES OF EDIBLE PHILIPPINE FUNGI EDWIN BINGHAM COPELAND, PH. D. SYSTEMATIC BOTANIST MANILA BUREAU OF PUBLIC PRINTING 1905 PREVIOUS PUBLICATIONS OF THE BUREAU OF GOVERNMENT LABORATORIES. No. 1, 1902, Biological Laboratory. — Preliminary Report of the Appearance in the Philippine Islands of a Disease Clinically Resembling Glanders. By R. P. Strong, M. D. No. 2, 1902, Chemical Laboratory. — The Preparation of Benzoyl-Acetyl Peroxide and Its Use as an Intestinal Antiseptic in Cholera and Dysentery. (Pre- liminary notes.) By Paul C. Freer, M. D., Ph. D. No. 3, 1903, Biological Laboratory. — A Preliminary Report on Trypauosomiasis of Horses in the Philippine Islands. By W. E. Musgrave, M. D., Acting Director Biological Laboratory, and Norman B. Williamson, Assistant Bac- teriologist, Bureau of Government Laboratories. No. 4> 1903, Serum Laboratory. — Preliminary Report on the Study of Rinderpest of Cattle and Carabaos in the Philippine Islands. By James W. Jobling, M. D., Director of the Serum Laboratory. No. 5, 1903, Biological Laboratory. — Trypanosoma and Trypanosomiasis, with Special Reference to Surra in the Philippine Islands. By W. E. Musgrave, M. D., Acting Director Biological Laboratory, and Moses T. Clegg, Assist- ant Bacteriologist Biological Laboratory. No. 6, 1903. — I. New or Noteworthy Philippine Plants. II. The American Element in the Philippine Flora. By Elmer D. Merrill, Botanist. No. 7, 1903, Chemical Laboratory. — The Gutta Percha and Rubber of the Philip- pine Islands. By Penoyer L. Sherman, jr., Ph. D., Chemist, Chemical Laboratory. No. 8, 1903. — A Dictionary of the Plant Names of the Philippine Islands. By Elmer D. Merrill, Botanist. No. 9, 1903, Biological Laboratory. — A Report on Hemorrhagic Septicaemia in Animals in the Philippine Islands. By Paul G. Woolley, M. D., and J. W. Jobling, M. D. No. 10, 1903, Biological Laboratory. — Two Cases of a Peculiar Form of Hand Infection (Due to an Organism Resembling the Koch- Weeks Bacillus). By John R. McDill, M. D., and Wm. B. Wherry, M. D. No. 11, 1903, Biological Laboratory. — Entomological Division, Bulletin No. 1, Preliminary Bulletin on Insects of the Cacao. (Prepared Especially for the Benefit of Farmers). By Charles S. Banks, Entomologist Bureau of Government Laboratories. No. 12, 1903, Biological Laboratory. — Report on Some Pulmonary Lesions Pro- duced by the Bacillus of Hemorrhagic Septicaemia of Carabaos. By Paul G. Woolley, M. D. No. 13, 1904, Biological Laboratory. — A Fatal Infection by a Hitherto Undescribed Chromogenic Bacterium : Bacillus aureus fcetidus. By Maximilian Herzog, M. D. No. 14, 1904 — Serum Laboratory: Texas Fever in the Philippine Islands and the Far East. By J. W. Jobling, M. D., and Paul G. Woolley, M. D. Biological Laboratory: Entomological Division, Bulletin No. 2, The Australian Tick (Boophilus Australis Fuller) ' in the Philippine Islands. By Charles S. Banks, Entomologist. No. 15, 1904, Biological and Serum Laboratories. — Report on Bacillus Violaceus Manila : A Pathogenic Micro-organism. By Paul G. Woolley, M. D. No. 16, 1904, Biological Laboratory. — Protective Inoculation Against Asiatic Chol- era : An Experimental Study. By Richard P. Strong, M. D. No. 17, 1904. — New or Noteworthy Philippine Plants. By Elmer D. Merrill, Botanist. No. 18, 1904 Biological Laboratory. — I. Amebas : Their Cultivation and Etiologic Significance. By W. E. Musgrave, M. D., and Moses T. Clegg. II. The Treatment of Uncomplicated Intestinal Amebiasis (Amebic Dysentery) in the Tropics. By W. E. Musgrave, M. D. (Continued on third pajje of cover.) Photo by Martin. PLATYCERiUM BIFORME (SW.) BLUME. (IN CULTIVATION IN MANILA.) No. 38.— JULY, 1905 DEPARTMENT OF THE INTERIOR BUREAU OF GOVERNMENT LABORATORIES I. (THE POLYPODIACEAE OF THE PHILIPPINE ISLANDS II. NEW SPECIES OF EDIBLE PHILIPPINE FUNGI * BY EDWIN BINGHAM COPELAND, PH. D. SYSTEMATIC BOTANIST MANILA BUREAU OF PUBLIC PRINTING 1905 I. THE POLYPOD1ACE/E OF THE PHILIPPINE ISLANDS. 1217015 LETTER OF TRANSMITTAL DEPARTMENT OF THE INTERIOR, BUREAU OF GOVERNMENT LABORATORIES, OFFICE OF THE SUPERINTENDENT OF LABORATORIES, Manila, P. I., December 21, 1904. SIR: I have the honor to transmit herewith and to recommend for publication articles entitled "I. The Polypodiacese of the Philip- pine Islands/' and "II. New Species of Edible Philippine Fungi," by Edwin Bingham Copeland, Ph. D., Systematic Botanist. Very respectfully, EICHARD P. STRONG, Director Biological Laboratory, Acting Superintendent Government Laboratories. Hon. DEAN C. WORCESTER, Secretary of the Interior. 5 I. THE POLYPODIACE£ OF THE PHILIPPINE ISLANDS. INTRODUCTION. The PolypodiacecB are distinguished from the other orders of true ferns by the character of the sporangium, which is usually stalked and provided with a longitudinal annulus interrupted by the stalk, and opening by a stomium at right angles to the annulus. In the field, and without the use of the microscope, they can be distinguished as a rule from other ferns by the following charac- teristics : They are rarely tree ferns, as are Marattiacece and CyatJieaceoB. They are not filmy in texture, as are Hymenophyllacece. They are not dichotomously compound, like most of our Gleiche- niacece. They do not have climbing fronds, as do most of our Schizaeacece. In the Philippines, as elsewhere in the world, the PolypodiacecB are several times more numerous than are all other ferns combined, and, therefore, a treatment of the order does not fall far short of being an entire fern flora. My attempt has been to collect and publish descriptions of all the ferns known to have been found in these Islands. It is likely that I have fallen considerably short of this goal, for in some groups the discrepancy between my number of species and the larger one given by Underwood x is far greater than can be explained by any difference in our interpretation of specific limits. A history of the work on the ferns of these Islands would be superfluous, since the subject has been well handled within the past two years by both Merrill2 and Underwood. While I was engaged on this work practically no ferns collected before the American occupation were available for study in Manila. 1 Underwood, L. M. : A Summary of Our Present Knowledge of the Ferns of the Philippines. Contr. Bot. Dept., Columbia Univ., No. 206, 1903. 2 Merrill, E. D.: Botanical Work in the Philippines. Bull. (Philippine) Bureau of Agr. No. 4, 1903. 7 8 POLYPODIACE^E OF THE PHILIPPINE ISLANDS. I am not personally acquainted with a large part of those ferns still known here only from earlier collections and have compiled their descriptions from various sources, especially from the Synopsis Filicum. Of the collections most frequently cited, those of Cuming, Baranda, Steere, Warburg, and Loher are given on the authority of other botanists; while I have at my disposition the collections of Merrill, Elmer, Whitford, Barnes, other collectors employed by the Bureau of Forestry and the Exposition Board, and my own. Ferns have been among the plants most ill favored by the imposi- tion of plural names, and therefore, in these days of chaos in nomen- clature, they present the best of material for jugglery. Not caring to take any part in the strife between the advocates of the different "rules" of nomenclature, I have made it my chief principle to form no new combination of names for any plant which already had, in its proper genus, a name valid under any rules. Pending a gen- eral agreement among competent botanists, it seems to me that current usage should be the chief criterion in deciding a choice between names. Because their adoption would have compelled me to make new combinations for many species, rather than from any preference for these generic names themselves, I have retained the ones in common use, rather than those taken up by Underwood, for Gymnopteris, Neplirodium, Hymenolepis, and Niphobolus. Chiefly for the same reason, but in part too because I can not see that the multiplication of genera adds a particle to the naturalness of the presentation, I have maintained as very large genera Neplirodium, Aspidium, Asplenium, and Polypodium. It may not be superfluous to add that this Bureau will be very glad to undertake the determination of any ferns which may be sent to it. It is to encourage the interest in our ferns, and in response to very numerous requests for a guide in the determination of the local plants that this paper, our first systematic treatment of any part of the Philippine flora, is published. I take the liberty of copying literally, from Professor Underwood's already mentioned paper, the following directions for the profitable collection of fern specimens : (1) In all ferns not over 2 feet high an entire plant should be secured, but in plants growing in dense crowns the rootstock may well be split lengthwise and several of the leaves removed before drying. (2) In all ferns not over 4 feet high an entire leaf should be secured if possible attached to the rootstock or to some portion of it. In case of INTRODUCTION. 9 very wide leaves the lower pinnae on one side may be cut away to prevent the too great massing of foliage when the leaf is doubled on itself to make a manageable specimen. (3) In tree ferns the basal portion of the petiole should always be secured, if possible, attached to the lower pinnules. Where possible the top of the caudex should also be taken. Notes on the character of the leaf scars should always be made. (4) If the specimen taken does not show whether the leaves are scattered or cespitose this should always be included in the notes. (5) In ferns, of whatever size, invariably secure some portion of the rootstock, for it nearly always possesses diagnostic characters. (6) In large leaves note whether the lowermost pinnae are larger than the others or are reduced in size and if their laminae stand in the same plane as the rest of the leaf or are set obliquely. POLYPODIACE^E. Chiefly perennial plants, rarely annual, and rarely arborescent; leaves (called fronds) with the tissues of flowering plants — epidermal, fibro-vascular, and fundamental ; spores borne in stalked sporangia with incomplete longitudinal annulus and transverse stomium. Families of the Polypodiacece. Stipe not articulate to the rhizome ; sorus dorsal on its vein ; indusium fastened beneath the sorus on all sides, ruptur- ing irregularly over it (p. 14) ................................................ I. WOODSIE,E Fronds not articulate to the rhizone ; sori dorsal or terminal on their veins, usually round, exceptionally extending along the veins or over the parenchyma ; indusia fixed by the center or at the top of a basal sinus, frequently wanting (p. 15) ............................................. _ ........................... II. ASPIDIE^E Stipe articulate to the rhizome, or not; sori, except In Oleandra, terminal on the veins, often on the margin of the frond, and the margin modified in connection with them ; indusium opening toward the margin or obliquely, wanting in Monachosorum (p. 45) .......................................... III. DAVALLIE.*; Stipe, except in Stenochlcena, not articulate to the rizhome ; sori superficial, springing from the sides of the fertile veins ; indusium opening on the side away from the vein or irregularly in Allantodia) or wanting (p. 66) .............. IV. ASPLENIE^E Stipe not articulate to the rhizome ; sori near the margin, on the ends of the veins or a strand connecting their ends, protected, except in Nothochlcena, by the inflexed and modified margin of the frond (p. 92) ............. ., ................. V. PTERIDE^E Fronds simple and entire, not articulate to the rhizome ; sori marginal or dorsal, linear, usually immersed (p. 106).. VI. VITTARIE^B Stipes articulate to the rhizome ; sori terminal or dorsal on the veins, usually of definite form and size, without indusia (p. 110) ....................... _ ...................................... - ....... VII. POLYPODIES Fronds articulate to the rhizome or not ; sporangia cover- ing the fertile surface, without being collected into sori ; indusia therefore wanting (p. 136) ........................................ VIII. ACHROSTICHES Artificial key to the families and erratic genera. 1. Sori indefinite, covering the dorsal surface, in- dusium wanting (Achrostichum L.). 2. Fertile region restricted to specialized apex of simple frond (49) Hymenolepis 11 12 POLYPODIACEJE OF THE PHILIPPINE ISLANDS. 2. Fertile region not so restricted. 3. Fronds articulate to rhizome. 4. Fronds pinnate (32) Stenochlcena 4. Fronds simple, dichotomous (62) Platycerium 3. Fronds not articulate to rhizome. 4. Fertile and sterile fronds alike. 5. Fronds simple (59) Elaphoglossum 5. Fronds pinnate (60) Achrostichum 4. Fronds dimorphous. 5. Veins free (7) Polybotrya 5. Veins forming areolae along main veins (8) Stenosemia 5. Veins anastomosing copiously. 6. Sterile frond 2-pronged (61) Cheiropleuria 6. Fronds*pinnate in plan (9) Gymnopteris 1. Sporangia gathered into sori, which are sometimes contiguous, or somewhat indefinite. 2. Sori elongate, not marginal nor sunken. 3. Indusium wanting. 4. Fertile veins oblique to costa. 5. Veins free throughout (23) Coniogramme 5. Veins free except near mar- gin (26) Syngramme 5. Veins anastomosing copiously. 6. Sori anastomosing (24) Hemionitis 6. Sori simple. 7. Stipe not artic- ulate (25) Loxogramme 7. Stipe articulate to rhizome (54) Selliguea 4. Fertile veins connecting main veins (5) Meniscium 4. Sori parallel to costa, one on each side. 5. Frond pinnate (50) Tcenitis 5. Frond tripartite (51) Christopteris 5. Frond simple and entire (52) Drymoglossum 3. Indusium present ASPLENIE.-E 2. Sori elongate, sunken, fronds simple and entire fViTTAEiE^ {Polypodium elongatum 2. Sori marginal or submarginal, protected by the inflexed margin of the frond PTERIDE;E 2. Sori marginal or submarginal, apical on their veins, indusium opening toward margin DAV ALLIED 2. Sori dorsal on the fronds, round or nearly so. 3. Stipe articulate to rhizome, indusium absent POLYPODIES 3. Stipe articulate to rhizome, indusium present DAVALLIES 3. Stipe not articulate to rhizome. 4. Indusium fastened on all sides, rupturing in middle (1) Diacalpe 4. Indusium, when present, not fast- ened on all sides. 5. Veins all free, sori terminal. 6. Pinnae articulate to rachis (12) Nephrolepis ARTIFICIAL KEY. 13 6. Pinnae not articulate to rachis. 7. Indusium atta 7. Indusium fixed by base only, or wanting .............. ASPIDIE^B 5. Veins free, sori subterminal or dorsal. 6. Frond quadripinnate, sorus naked .............. (20) Monachosorum 6. Less compound, or with indusium .................. ASPIDIE^E 5. Veins anastomosing ...................... ASPIDIEJE I. WOODSIE^E. Stipe not articulate to the rhizome; sorus dorsal on its vein; indusium fastened beneath the sorus on all sides, rupturing irregularly over it. (1) DIACALPE Blume. Rhizome erect; fronds large, tripinnate; veins free; sorus usually one to each segment, on the lowest acropetal veinlet; indusium spherical. Two terrestrial ferns, in this part of the world. (1) D. aspidioides Blume. Stipes clustered, erect, 40 cm. high, scaly at the base ; frond 25 to 50 cm. high, triangular-ovate ; pinnules oblong-cuneate, lobed and more or less decurrent, submembranaceous, glabrescent, or sparsely chaffy on the veins, disposed to blacken in drying. Mountains of Benguet and Lepanto, not below 2,000 m., Loher. India, southern China, and Malaya. 14 II. ASPIDIE.E. Fronds not articulate to the rhizome; sori terminal or dorsal on their veins, usually round, exceptionally extending along the veins or over the parenchyma; indusia fixed by the center or at the top of a basal sinus, never elongate, frequently wanting. Because the presence or absence of the indusium varies within the larger genera, and even in some of their species, no classification and arrangement of the Aspidiece is everywhere easy to use. But, for this reason, any arrangement which tries to define its genera primarily by this character is eminently artificial and impractical. This is the largest group in our fern flora, and, except for the genera whose sporangia cover the dorsal surface, it is a very natural one, distinguished from the Polypodiece by the nonarticulate stipe and the usually present indusium, from Aspleniece by the round sorus and indusium, and from Davalliece by the latter's mode of attachment. < 1. Frond pinnate or pinnately vehied. 2. Sori definite, confined to the veins, fertile fronds or segments not sharply differentiated. 3. Veins free. 4. Indusium oval, attached by its axis (2) DidymocJilcena 4. Indusium orbicular, attached by its center.. (3) Polystichum 4. Indusium cordate-reniform or wanting (4) Lastraea 3. Lowest veinlets of neighboring veins uniting to form regular triangular areolae, usually with a series of regular areolse outside. 4. Sori round (4) Nephrodium 4. Sori elongate along the cross-veinlets (5) Meniscium 3. Veins anastomosing copiously (6) Aspidium 2. Fronds or their segments dimorphous, sori covering the parenchyma. 3. Veins free (7) Polybotrya 3. Veins anastomosing. 4. Veins free toward the margin (8) Stenosemia 4. Veins anastomosing throughout (9) Gymnopteris 1. Frond and venation dichotomous (10) Dipteris (2) DIDYMOCHLAENA Desvaux. Fronds at least bipinnate, the basiscopic half of the ultimate divisions almost suppressed; veins free, branched; sori terminal on them but not marginal, somewhat elongate; indusium the shape of the sorus, fixed along the middle, opening on all sides. A single variable species, terrestrial in most tropical countries, resembling a Lindsay a more than any of its relatives in Aspidiece. 15 16 POLYPODIACEJE OF THE PHILIPPINE ISLANDS. (1) D. lunulata Desv. Rhizome erect, rising above the ground or not; stipes clustered, fronds 1 to 2 m. high, commonly bipinnate; pinnules almost dimidiate, trapezoidal, the lower margin almost straight, the upper slightly rounded, entire, glabrous, herbaceous; sori 4 to 6 to a pinnule, large, partly immersed. Luzon, Cuming 142, Steere; Mount Apo, DeVore and Hoover 345, com- mon at about 4,500 feet. Pantropic. (3) POLYSTICHUM Roth. Fronds at least pinnate, usually tough or rigid, with toothed and spinulose margins and the basiscopic half the less developed; veins free, or in one species anastomosing sparsely and irregularly; sori round, usually dorsal; indusium normally peltate, exceptionally reniform. A reasonably natural genus, but difficult to define because of the many directions in which single species or groups vary; related to both Neph- rodium and Aspidium. Mostly terrestrial. 1. Pinnae articulate to rachis (Cyclopeltis) _ (1) P. preslianum 1. Pinnae not articulate, veins free (Eupolystichum) . 2. Simply pinnate (2) P. auriculatum 2. Lower pinnae pinnate, sori costal or medial. 3. Teeth aristate. (3) P. aculeatum 3. Teeth blunt or mucronate (4) P. obtusum 2. Lower pinnae pinnate, sori submarginal (5) P. amabile 2. Lower pinnae at least bipinnate. 3. Teeth mucronate or awned. 4. Lower pinnae lanceolate-deltoid. 5. Rhizome creeping (6) P. aristatum 5. Rhizome erect (7) P. coniifolium 4. Pinnae linear (8) P. horizontale 3. Teeth awnless (9) P. varium 1. Pinnae not articulate, veins inclined to anastomose toward the margin (10) P. falcatum (1) P. preslianum (J. Sm.) Moore. Rhizome creeping or oblique, short, densely fibrillose; stipes clustered, 3 to 10 cm. high, naked or nearly so; frond 20 to 40 cm. high, 8 to 10 cm. broad, simply pinnate; pinnae jointed to the rhizome, broadly lanceolate, obscurely crenate, almost horizontal, acute, cordate on the lower and truncate on the upper side at the base, coriaceous, glabrous; veins forked about three times, the lower branches falling short of the margin; sori in 1 to 3 rows on each side of the costa, the costal row the most constantly complete. Masbate and Catanduanes, Baranda; Tayabas, Merrill 3351. Malaya. A species very near this, but with thinner foliage and the pinnae not articulate to the rachis, occurs in Luzon and Mindanao, and probably throughout the Archipelago; the two are decidedly too alike for me to separate them generically, by recognizing J. Smith's Cyclopeltis. (2) P. auriculatum (Sw.) Presl, var nervosum (Fee) Christ. Stipss fasciculate, decumbent, 10 to 15 cm. long, scaly below or throughout; frond about 30 cm. long, 5 cm. broad; pinnae numerous, subsessile, crenate, ASPIDIEJE — POLYSTICHUM. 17 without awns, falcate, acute, auricled on the upper side, subcoriaceous ; sori minute, scattered, indusia almost wanting. Mount Mariveles, 1,400 m., Loher. India to Formosa ( the type ) . (3) P. acuieatum (Sw.) Roth. Stipes tufted, 15 cm. and upward in height, more or less clothed with ovate-lanceolate and fibrillose pale brown scales; frond 30 to 60 cm. high, 20 cm. broad, bipinnate below or almost throughout; pinnae close, horizontal, lanceolate; pinnules ovate-rhomboidal, oblique, auricled on the acroscopic side at base, aristate-serrate, sub- coriaceous, almost glabrous; rachises fibrillose or scaly; sori principally in rows, nearer the midrib than the margin. An exceedingly variable species, or type of a large group of closely related species, of which our material is not sufficient to determine which are distinct enough to be profitably named. Beside fairly typical specimens the following varieties are reported: Hastatum Ten., Davao, Warburg 14150. Subamoenum Christ, Davao, Warburg 14124, 14136. Batjanense Christ, which is almost tripinnate, Benguet, Loher. Luzon, Steere; Davao, Warburg 14149, Copeland 1031. Cosmopolitan. (4) P. obtusum (Mett.) Presl. Stipes tufted, 10 to 15 cm. high, densely clothed with large, ovate-acuminate, bright brown scales; frond 30 cm. or more high, 10 to 15 cm. broad, lanceolate; pinna? numerous, distant, linear- lanceolate, the lower ones 6 to 10 cm. long; pinnules distinct, oblong- rhomboidal, the obscure teeth blunt or mucronate, subcoriaceous, glabrous; rachis densely fibrillose; sori in rows midway between the midrib and margin. Luzon, Cuming 234, Lobb; Mount Arayat, Loher; Baguio, Topping 179. Not very distinct from P. acuieatum. (5) P. amabile (Bl.) Presl. Rhizome creeping, scaly; stipes scattered, about 30 cm. high, slender, stramineous, scaly toward the base; frond 30 cm. or more high, 20 to 25 cm. broad, with a lanceolate, acuminate, terminal pinna, and 3 to 6 similar lateral ones on each side; pinnules rhomboidal, with at least half of the lower side cut away, 10 to 15 mm. long, over half as broad, the upper side and outer half of the lower lobed and sharply spinulose-serrate, subcoriaceous, glabrous; sori submarginal, small. Benguet, Loher; Davao, Copeland 1114. India to Formosa and Java. (6) P. aristatum (Sw.) Presl. Rhizome creeping; stipes scattered, 30 to 50 cm. high, clothed at least toward the base with linear or fibrillose scales; frond 30 to 60 cm. high, 20 to 30 cm. broad, ovate-deltoid, tri- or quadripinnatifid; lower pinnae largest, 15 to 25 cm. long, subdeltoid; lowest pinnules much largest, lanceolate-deltoid, 5 to 10 cm. long, with subdeltoid lower segments; teeth copious, aristate; texture subcoriaceous; glabrous, rachis nearly so; sori small, principally in rows near the midrib; indusium sometimes reniform. 24036 2 18 POLYPODIACFJE OF THE PHILIPPINE ISLANDS. Luzon, Steere; Benguet and Arayat, Loher; Camarines, Baranda. Africa to Japan and Polynesia. (7) P. conifolium (Wall.) Presl. Rhizome erect; stipes clustered, 20 to 50 cm. high, clothed at the base with narrow black scales, stramineous ; frond 30 to 50 cm. high, deltoid; pinnae deltoid, the lowest 10 to 15 cm. long, with its lowest basipetal pinnule largest, usually falcate, 6 to 8 cm. long, its pinnules of the second order stalked and toothed or lobed, spinulose, subcoriaceous, glabrous; sori mostly in rows along the midribs. Luzon, Cuming 262; Benguet, Loher, Topping 192; Arayat, Merrill 3815; Mount Mariveles, Copeland, Barnes 136, 142; Whitford 136. Africa to Polynesia. (8) P. horizontale Presl., in Epim. Bot., p. 57. Stipes clothed with short, ovate, and long, linear acuminate scales; frond about 1 m. high, ovate, tripinriate; pinnae subopposite, short stalked, linear, very acute, the lower ones horizontal; primary pinnules subsessile, oblong-lanceolate, acute; secondary pinnules sessile, rhomboidal, obtuse, mucronate-dentate, coriaceous, the veins beneath bearing scattered, minute scales; sori rather large, with coriaceous, persistent indusium. Luzon, Cuming. (9) P. varium (L.) Presl. Rhizome short, creeping; stipe 30 to 60 cm. high, densely fibrillose toward the base; frond 30 to 50 cm. high, about 30 cm. broad; lower pinnae the largest, 15 cm. long, subdeltoid, with the lowest basipetal pinnules elongate, 8 cm. long, and divided into distinct, linear-oblong, falcate secondary pinnules; the rest of the frond only bipinnate, teeth rather obscure, not spinulose; coriaceous, glabrous, but rachis and midribs fibrillose; sori medial; indusia reniform or peltate. Baguio, Elmer 6,489; Arayat, Loher. Japan and China. (10) P. falcatum (L.) Diels. Stipes tufted, 15 to 30 cm. high, beset at the base with large, dark scales; frond 30 to 60 cm. high, ovate- lanceolate, simply pinnate; pinnae numerous, the lower ones stalked, ovate- acuminate, falcate, 10 to 15 cm. long, 2 to 5 cm. broad, entire or slightly undulate, contracted suddenly on the upper side and often auricled; rounded or obliquely truncate on the lower, coriaceous, glabrous, glossy above; veins as a rule anastomosing toward the margin; sori small, copious, scattered. Mount Data, 2,250 m., Loher. Natal across India to Hawaii. (4) NEPHRODIUM Richard. Fertile and sterile fronds or parts of the frond not differentiated, or but slightly so; veins free, or the branches of adjacent veins anas- tomosing to form regular areolae, triangular next the costa, trapezoidal farther out ; sori round, the indusim cordate-reniform or wanting. Mostly terrestrial ferns, of medium or large size, thin or moderately firm, but not very coriaceous, compound. Related through Pleocnemia to Aspidium. A very large genus, so natural that even the separation of the two great ASPIIHEJE — NEPHRODIUM. 1 9 subgenera leaves several species in an equivocal position. In spite of this homogeneity it includes a large number of genera proposed at different times. Lastrcea: Veins free. 1. Simply pinnate, pinnae not incised beyond the middle (1) N. hirtipes 1. Simply pinnate, pinnae incised beyond the middle. 2. Lowest pinnae not reduced conspicuously. 3. Lowest pinnae considerably longer than others. 4. Frond over 30 cm. high (2) N. distans 4. Frond under 10 cm. high (3) N. grammitoides 3. Lowest pinnae not longer than others. 4. Segments of pinnae at right angle to costa. 5. Segments obtuse (4) N. crassifoUum 5. Segments acute J(5) N~ Fauriei elatius 1(6) N. attenuatum 4. Segments of pinnae forming acute angles. 5. Veinlets less than 10 on a side. 6. Lower surface villous (7) N. calcaratum 6. Lower surface grandular .... (8) N. viscosum 6. Lower surface glabrous (15) N. sagenoides 5. Veinlets more than 10 on a side. 6. Sori submarginal, texture thin ' (9) N. irnmersum 6. Sori marginal, subcoriaceous (10) N. ligulatum 2. Lowest pinnae reduced, veinlets simple. 3. Pinnae not lobed nearly to their midrib (11) N. exiguum 3. Pinnae lobed nearly or quite to their rachis. 4. Veinlets 4 or 5 on a side (12) N. Beddomei 4. Veinlets 8 to 12 on a side |(13) N~ ^rsseni |(14) N. oxydon 2. Lowest pinnae reduced, veinlets forked. 3. Lobes of pinnae entire. 4. Sori subterminal, indusium absent... (16) 2V. obscurum 4. Sori subterminal, indusium present (17) N. syrmaticum 3. Lobes of pinnae toothed or pinnatifld. 4. Surfaces glabrous, young indusium red.. (18) TV. erythrosorum 4. Surfaces glabrous, indusium never red.... *(19) N. Preslii 4. Lower surface villous (20) 2V. flaccidum 1. Decompound (except 2V. dissectum). 2. Small or middle sized ferms with erect rhizome. 3. Frond ovate-lanceolate, glabrous ,. (21) 2V. sparsum 3. Frond deltoid, pubescent beneath (22) 2V. crenatum 2. Small or middle sized ferns, rhizome creeping. 3. Sori marginal (23) 2V. recedens 3. Sori medial (24) 2V. hirtum 2. Large ferns, indusium usually inconspicuous. 3. Bipinnatifld (25) 2V. dissectum 3. Bipinnate. 4. Lamina glabrous (26) 2V. intermedium 4. Both surfaces villous (27) 2V. asperulum 3. Tripinnate. 4. Indusium present. 5. Frond not glabrous (28) N.setigerum 5. Glabrous throughout (29) 2V. divisum 4. Indusium wanting. 5. Rhizome erect (30) 2V. ornatum 5. Rhizome creeping (31) 2V. rugulosum 3. Quadripinnate (32) 2V. megaphyllum 20 POLYPODIACE^E OF THE PHILIPPINE ISLANDS. Goniopteris: Veinlets from neighboring veins anastomosing regularly. 1. Terminal pinna much exceeding the lateral, lobes uniform. 2. Sori small, lamina not villous (33) N. simplicifolium 2. Sori large, lamina villous. 3. Frond obtuse (34) N. Bakeri 3. Frond acuminate (35) 2V. canescens 1. Terminal pinna exceeding lateral or not, lobes of pinnae very unequal (36) N. diversilobum 1. Terminal pinna hardly exceeding lateral, lobes uniform. 2. Rhizome creeping. 3. Lower pinnae hardly, if at all, reduced. 4. Pinnae entire (37) N. rubidum 4. Segments of pinnae entire. 5. Sori marginal in the lobes (38) N. pteroides 5. Sori not confined to lobes, pinnae not lobed over half way to costa. 6. Indusium hairy (39) N. unitum 6. Indusium absent, sori in- definite (40) N. aoristisorum 6. Indusium absent, sori definite. 7. Proliferous (41) N. proliferum 7. Not proliferous (42) N. urophyllum 6. Indusium present, not hairy (43) N. moulmeinense 5. Sori not confined to lobes, pinnae lobed two-thirds of way to costa.. (44) N. extensum 4. Segments of pinnae sharp toothed (45) N. Otaria 3. Lower pinnae shorter than the succeeding. 4. Glabrous (46) N. aridum 4. Not glabrous beneath. 5. Rachis nearly naked (47) N. cucullatum 5. Rachis villous, sori marginal (48) N. loherianum 5. Rachis villous, sori medial. 6. Pinnss 15 cm. long, villous beneath (49) N. invisum 6. Pinnae 25 cm. long, gland- ular (50) N. Mrsutum 2. Rhizome erect. 3. Pinnae entire, or not lobed one-third of dis- tance to midrib. 4. Lowest pinna? not much reduced. 5. Pinnae under 10 cm. long (51) N. glandulosum 5. Pinnae over 20 cm. long (52) N. philippinense 4. Lowest pinnae reduced. 5. Rachis and lower surface glabrous (53) N. latipinna 5. Rachis and lower surface not glabrous. 6. Lower pinna} gradually smaller and deflexed (54) N. amboinensc 6. Lower pinnae very abruptly reduced. 7. Veinlets 3 to 4 on a side (55) N. Arbuscula 1. Veinlets 6 to 9 on a side (56) N. pennigerum 3. Pinnae incised one-third or two-thirds of dis- tance to midrib. ASPIIHE^E — NEPHRODIUM, 21 4. Lower pinnae abruptly reduced to auri- cles (57) N. hispidulum 4. Lower pinnee not abruptly reduced to auricles. 5. Stipe black flbrillose, later rough.. (58) N. ferox 5. Stipe naked or villous. 6. Frond about 40 cm. high, sori medial (59) N. parasiticum 6. Frond about 1 m. high, sori close to veins (60) N. truncatum (1) N. hirtipes (Bl.) Hooker. Stipes tufted, 30 cm. or more high, densely clothed with long, blackish, fibrillose scales; frond 60 to 100 cm. high, 20 to 40 cm. broad; pinnae 10 to 20 cm. long, 2 to 3 cm. broad, cleft about one-third of the way to the midrib into obtuse lobes, herbaceous, glabrous, the lower ones not reduced; rachis fibrillose like the stipe; veinlets 4 or 5 on each side; sori medial, indusium sometimes wanting. Benguet and Arayat, Loher. India and Malaya. (2) N. distans (Don) Diels. Rhizome more or less creeping; stipes 30 to 45 cm. high, slender, glossy, stramineous or chestnut; frond 40 to 100 cm. high, 20 to 30 cm. or more broad; lowest pinnae rather the largest, 15 to 20 cm. long, 4 cm. broad, cut down nearly or quite to the rachis into deeply pinnatifid pinnules 6 mm. broad, with obtuse or acute, toothed or subentire lobes, herbaceous, slightly pubescent beneath; rachis naked; veinlets slightly pinnate in the lower lobes, pellucid ; sori scattered, copious, exindusiate. Benguet, Loher. • India to Celebes. (3) N. grammitoides (Christ, Bull. Herb. Boiss. 6:193). Rhizome short creeping, scaly; stipes weak, 3 to 4 cm. high, stramineous, clothed, like the entire plant, with short, stiff, whitish hairs; frond 5 to 7 cm. long, 15 to 20 mm. broad, caudate-attenuate, broadest at the base, bipin- natifid; free pinnae about 6 pairs, remote, alternate, sessile, triangular- deltoid, acuminate, incised below to the costa into acute, triangular, crenate lobes 4 mm. long; veins pinnate in the lobes; sori minute, round, 3 or 4 on each side of the vein; indusium minute and pilose, or wanting. Mount Mariveles, 1,400 m., Loher. (4) N. crassifolium Hooker. Stipes tufted, 30 cm. or more high, glossy, slightly villous ; frond 40 to 60 cm. high, 20 to 30 cm. broad ; pinnae 10 to 15 cm. long, 2 to 4 cm. broad, their lobes obtuse, falcate, 4 to 6 mm. broad, reaching from half to two-thirds down to the midrib, subcoriaceous, glossy but the midribs finely villous, lower pinnae distinctly stalked; veinlets 10 to 12 on each side, with the sori nearer the midrib than the margin; indusium small, evanescent. Philippines, Loher; Negros, Copeland 93. Malaya. (5) N. Fauriei (Christ) var. elatius (Christ) probably belongs here. It is a small fern, with very narrow fronds, and consequently short pinnae, 22 POLYPODIACRS3 OF THE PHILIPPINE ISLANLS. and large sori; in the Philippine form the pinnae are incised at the base to the rachis, or nearly. so. Mount Tonglon, 2,250 m., Loher. Japan. (6) N. attenuatum (J. Sm.) Baker. Stipes 30 cm. or more high, firm, glossy, naked; frond about 100 cm. high, 00 cm. broad; pinnae 20 to 30 cm. long, 2 to 3 cm. broad, long-acuminate, incised three-fourths of the way to the costa into spreading, entire, obtuse lobes 2 mm. broad, the basal lobes much reduced, subcoriaceous, glandular beneath, lowest pinnae slightly stalked; veinlets 12 to 16 on each side; sori in a close row, indusiate. Samar, Owning 327 ; Rizal, Loher. (7). N. calcaratum (Bl.) Hooker. Rhizome short, erect; stipes densely tufted, stramineous, 20 cm. high; frond 30 to 40 cm. high, 10 to 15 cm. broad; pinnae spreading, 4 to 10 cm. long, 1 to 2 cm. broad, cut down two-thirds or more of the way to the midrid into oblique, subfalcate, linear-oblong, acute or obtuse lobes, the lowest acroscopic the longest, herbaceous or subcoriaceous, dark green, more or less villous beneath; veinlets 3 to 6 on each side; sori medial, indusium glabrous, persistent. Philippines. India and Malaya. (8) N. viscosum Baker. Stipe 15 cm. or more high, firm, erect, reddish brown, slightly scaly, finely villous; frond 20 to 30 cm. high, about 10 cm. broad, oblong-lanceolate; pinnae close, 5 to 8 cm. long, 1 cm. broad, cut down nearly to the midrib into close, spreading, linear-oblong lobes, herbaceous, dark green, densely glandular beneath; veinlets 5 to 6 on a side; sori medial, indusiate. Philippines, Lobb. Malacca and Borneo. (9) N. immersum Hooker. Stipes tufted, 60 cm. or more high, stra- mineous, scaly at base, naked above, or sparsely pubescent at top; frond 100 to 200 cm. high, 40 to 60 cm. broad; pinnae 20 to 30 cm. long, 20 to 35 mm. broad, almost horizontal, acuminate, cut down almost to the midrib into close, spreading, subacute, linear lobes 2.5 mm. broad, papyraceo- herbaceous, pubescent with stiff white hairs nearly 1 mm. long; veinlets 10 to 15 on each side; sori nearer the margin than the vein, immersed so as to be prominent on the upper side; indusium peltate. Southern Luzon, Baranda; Davao, Copeland 695. Our plant is atypical in the close lobes and more pubescent fronds. Assam to New Caledonia. (10) N. ligulatum Hooker. Stipes gray, glossy, naked; frond about 100 cm. high, 30 to 50 cm. broad; pinnae 15 to 25 cm. long, 2 to 3 cm. broad, cut down very nearly to the midrib into linear, obtuse, entire, erecto-patent libes 2 mm. broad with more than their own space between them, subcoriaceous, finely pubescent beneath, as is the rachis; veinlets 10 to 12 on a side; sori quite marginal, indusiate. Luzon, Cuming 94; Cagayan-Luzon, Warburg 12216; Cebu, Owning 343. — NEPHRODIUM. 23 (11) N. exiguum Hooker. Stipes tufted, 15 to 25 cm. high, slender, gray, naked; frond 20 to 25 cm. high, 3 to 5 cm. broad; pinnae 2 to 3 cm. long, 1 cm. broad, cut down half way to the midrib or more into close, obtuse lobes, papyraceo-herbaceous ; rachis villous; veinlets obscure, 2 to 3 on each side; sori near the veins. Luzon, Cuming 251, 272. (12) N. Beddomei Baker. Rhizome slender wide-creeping; stipe 15 to 25 cm. high, slender, glossy; frond 15 to 50 cm. high, 5 to 10 cm. broad, lanceolate; central pinnae the largest, 3 to 5 cm. long, lanceolate, cut down to their rachis into close, rather acute, entire lobes, glabrous except for the veins, firm; lower pinnae distant and dwindling down very gradually; veinlets 4 to 5 on a side; sori close to the incurved margin, indusiate. Benguet, Loher, Topping 331, Elmer 6491. India, Java, southern China. (13) N. Luersseni Harrington, Journ. Linn. Soc. 16:29. Stipes clus- tered, .firm, shining, light purplish; frond 45 to 75 cm. high, 15 to 25 cm. broad, oblong, tapering abruptly to the base; pinnae 10 to 20 cm. long, 2 to 4 cm. broad, lanceolate, acuminate, jointed at the base, cut down almost or quite to the rachis into numerous linear or oblanceolate lobes 2 to 4 cm. long, membranaceous, glabrous, lowest pinna very small; veinlets 8 to 12 on a side, distant; sori marginal, indusiate. Near N. prolixum Baker. Baluku Island, growing on the margin of a pond, Steere. (14) N. oxydon (Baker in Journ. of Bot., 1879, p. 66, sub Polypodio) should probably be inserted here. Jolo Archipelago, BurMdge. (15) N. sagenoides (Mett.) Baker. Stipes tufted, slender, 15 to 50 cm. high, almost black, polished, scaly at the base; frond 30 to 60 cm. high, half as broad; pinnae 10 to 15 cm. long, 3 to 4 cm. broad, narrowed gradually from the base to the apex, cut down nearly to the midrib into linear- oblong, obtuse, crenate or entire lobes, papyraceo-herbaceous, gla- brous; veinlets 6 to 10 on a side, forked; sori terminal on the acropetal branch, nearer the margin than the vein, indusiate. Davao, Warburg 14122, Copeland 1238. Malaya. (16) N. obscurum (Fee) Diels. Stipes tufted, 30 cm. high, black, glossy, naked; frond 20 to 40 cm. high, deltoid-oblong, acuminate; pinna? about 10 cm. long, 2 to 3 cm. broad, cut three-fourths of the way to the midrib into close, obtuse lobes 5 mm. broad, thin-papyraceous; veinlets 6 to 8 on a side, forked; sori subterminal on the acropetal branches, medial. Philippines, Cuming 302; Rizal, Loher, a small form. Tavoy ? (17) N. syrmaticum (Willd.) Baker. Rhizome erect; stipes tufted, 30 to 60 cm. high, stramineous; frond 100 cm., more or less, high, less than half as broad; pinnae 15 to 25 cm. long, about 4 cm. broad, cut down 24 POLYPODIACEJE OF THE PHILIPPINE ISLANDS. almost to the midrib into slightly toothed lobes 5 mm. broad, subcoriaceous, glabrous, the lowest stalked, not much reduced; veinlets 8 to 12, some- times more than once forked; sori subterminal on the branches, as near the margin as the midrib, indusium small but evident. Near N. crassifolium. Luzon, Cuming 13, 14, 154; Sorsogon and Catanduanes, Baranda; Bohol, Cuming 354; Davao, Copeland 669, 928, 953, small forms; Zambo-anga, Copeland 736. India, Malacca. (18) N. erythrosorum Hooker. Stipes tufted, 15 to 25 cm. high, more or less densely clothed with long lanceolate and linear scales; frond 30 to 50 cm. high, 20 to 30 cm. broad, ovate-lanceolate; pinnse lanceolate, the lowest the largest, 10 to 15 cm. long, cut quite down to the rachis below into oblong-obtuse pinnules which are slightly, sometimes spinosely, toothed, herbaceous but firm, glabrous; sori in rows of 6 to 9, near the veins; indusium 1 mm. broad, flat, bright red when young. Japan and China. Benguet, Loher. (19) N. Preslii Baker. Stipes 15 to 25 cm. high, slender, deciduously fibrillose; frond 15 to 25 cm. high, 10 to 15 cm. broad, lanceolate-deltoid; upper pinnse lanceolate, close; lowest pair deltoid, the upper pinnules 4 mm. broad, obtuse, entire, the lower ones pinnatifid with similar lobes and broad uncut center, subcoriaceous, glabrous; rachis fibrillose; sori about 6 to the lower lobes, dorsal on the veins, nearer the vein than the margin. Luzon, Cuming 255. (20) N. flaccidum Hooker. Stipes tufted, 30 cm. or more high, slender, stramineous, naked; frond 30 to 50 cm. long, 15 to 20 cm. broad; pinnae 7 to 10 cm. long, 2 to 3 cm. broad, cut down to a rachis with a narrow, distinct wing into oblong lobes 4 mm. broad, cut about half way down in turn, herbaceous, villous beneath, like the rachis; lower pinna? distant, shorter than the others and deflexed; veinlets forked, or in the lower lobes subpinnate; sori about midway between the vein and margin. Benguet, Lo her. Himalayas to Java. (21) N. sparsum Don. Stipes tufted, 15 to 30 cm. high, scaly near the base, stramineous and glossy above; frond 30 to 60 cm. high, 20 to 30 cm. broad, ovate-lanceolate; lowest pinnae the largest, 10 to 15 cm. long, 3 to 5 cm. broad; lowest pinnule sometimes compound, the others lan- ceolate, unequal sided, pinnatifid with oblong, obtuse lobes, herbaceous but firm, glabrous, pale green; sori usually one to each lobe, near the vein; indusium flat, naked, 2 mm. broad. Benguet, Loher, Topping 282. Mauritius to Malaya and China. (22) N. crenatum (Forsk.) Baker. Stipes 25 to 50 cm. high, stramin- eous, glossy, densely clothed at the base with a tuft of lanceolate, bright brown scales; frond 20 to 40 cm. high, deltoid; lowest pinnse much the largest, deltoid, 15 to 25 cm. long, 6 to 10 cm. broad; pinnules lanceolate, XEPHEODIUM. 25 often imbricate, with ovate or oblong pinnatifid segments with rounded lobes, herbaceous, pale green, pubescent beneath as is the rachis; sori copious; indusium large, pale, villous. Cagayan-Luzon, Warburg 12205; Benguet, Loher, Elmer 6480, 6595; Arayat, Loher. Cape Verde Islands to China. (23) N. recede ns (J. Sm.) Hooker. Rhizome wide-creeping; stipe about 30 cm. high, erect, villous, soft, clothed at the base with squarrose, linear scales; frond 40 to 60 cm. high, 30 cm. or more broad, deltoid; lower pinnae much the largest, 15 to 30 cm. long, 10 to 15 cm. broad; pinnules of the lower side the largest, sometimes 15 cm. long, 5 cm. broad, with distinct, one-sided lanceolate segments with close, slightly toothed linear-oblong lobes, firm, nearly glabrous; rachises villous; sori small, 6 to 8 around the margin of the larger lobes. Luzon, Cuming 96. Ceylon and southern India. (24) N. hirtum (Presl.), non Hooker. Frond deltoid, decompound, 30 cm. long; rachises clothed with copious appressed, linear, brown paleae; lower pinna; the largest, deltoid, the lower side the more developed; central pinnae oblong-lanceolate; final segments oblong, entire, 2 mm. broad, moderately firm, glabrous; veinlets few, erecto-patent ; sori medial. "Philippines," Haenke. (25) N. dissect urn (Forst.) Desv. Stipes tufted, 30 cm. or more high, rather slender, glossy, clothed toward the base with linear, .dark brown scales; frond 30 to 150 cm. high, 30 to 100 cm. broad, deltoid; lower pinna; varying from simply pinnatifid, with broad obtuse lobes, to 30 cm. long, with similar pinnatifid pinnules, the center usually uncut for a breadth of 1 cm., and the uncut obtuse or acute ultimate divisions equally broad, papyraceo-herbaceous, bright green, nearly glabrous; sori copious, generally submarginal ; indusium flat, 1 mm. or more broad. Luzon, Cuming 36, 249. Madagascar to Polynesia. (26) N. intermedium (Bl.) Baker. Stipe 30 to 60 cm. high, stout, erect, densely clothed at the base with long, bright brown, silky fibrils; frond 60 to 100 cm. high, 30 .to 50 cm. broad, subdeltoid; lower pinnae lanceolate, often 30 cm. long, 10 cm. broad; pinnules close, lanceolate, with distinct oblong-lanceolate segments with ligulate, subentire lobes about 2 mm. broad, herbaceous, firm, glabrous or slightly scaly on the midribs; sori small, copious, nearer the veins than the margin; indusium thin, fugacious. Benguet and Rizal, Loher. Ceylon to Japan. (27) N. asperulum (J. Sm.). Stipe firm, terete, brownish, pubescent; frond 40 to 60 cm. high, 30 cm. or more broad; lower pinna; 15 to 25 cm. long, 5 to 8 cm. broad; pinnules lanceolate, 1 cm. broad, oblique, cut down to the rachis below into oblique, oblong, pinnatifid segments, sub- 26 POLYPODIACEJE OF THE PHILIPPINE ISLANDS. coriaceous, villous on both surfaces; veinlets immersed; sori copious, one to each ultimate segment. Luzon, Cuming 63; Albay, Baranda. (28) N. setigerum (Bl.) Baker. Rhizome creeping; stipe 30 to 50 cm. high, scaly at the base, naked in the middle, villous at the top, stramin- eous; frond 40 to 100 cm. high; lowest pinnae the largest, 20 to 30 cm. long, half as broad; pinnules close, linear-lanceolate, reaching a length of 10 cm. their segments pinnatifid more than half way to the midrib, herbaceous, glabrous or sparingly hirsute; sori minute, numerous; indu- sium fugacious. Cagayan-Luzon, Warburg 12207; Benguet, Topping 178; Rizal, Guer- rero 1. India across Polynesia. (29) IM. divisum Hooker. Stipes 60 to 100 cm. high, brownish, glabres- cent; fronds 2 to 3 m. high, spreading; lower pinnae 30 to 50 cm. long, 20 to 25 cm. broad; pinnules lanceolate, acuminate, their rachis very slightly winged, their rather obtuse segments cut down over half way to the midrib into sharp teeth or toothed lobes, papyraceous, glabrous, deep green; sori nearer the midrib than the margin, usually one to each tooth or lobe, indusiate. Mount Apo, Copeland 1138. India, Bourbon, Java. (30) N. ornatum (Wall.) Baker. Rhizome erect; stipe densely chaffy at the base and more or less so throughout, 50 to 100 cm. high; fronds 1 m. high and upward, ovate, at least tripinnate, exceedingly variable, villous beneath, herbaceous; sori often sheltered by the incurved margin, exindusiate. This is rather doubtfully distinct from N. setigerum. Luzon, Cuming 1, 75, 412; Rizal, Loher; Davao, DeVore and Hoover 360, 361, Copeland 611. India to Celebes. (31) N. rugulosum (Labill.). Rhizome wide-creeping, rather hairy than scaly; stipe 30 to 50 cm. high, puberulous and glandular; frond 30 to 120 cm. high, deltoid; lower pinnae the largest, themselves less broadly deltoid, their pinnules with distinct, obtuse, more or less deeply crenate segments 1 cm. long, 3 mm. broad, firm-papyraceous, viscid-puberulous, very sparsely so above, pale green, especially beneath; sori copious, or one at the base of each tooth, on the upper side, exindusiate. This is probably a form of JV. punctatum Diels; but that name is invalidated under the Berlin rules by Acrostichum .punctatum L., and under the Kew rules by Nephrodium punctatum Parish. Strikingly like Hypolepis. Baguio, Topping 252. All warm countries except Africa. (32) N. megaphyllum Baker. An enormeous fern, several meters high; stipe 15 mm. or more thick, rough, clothed with appressed, subulate scales, as is the rachis; frond ample, quadripinnate; pinnae 75 cm. long, 15 cm. broad, stalked, acuminate; pinnules almost sessile, remote, alternate, ovate- oblong; pinnules of the third order 3 cm. long, almost sessile, broadly ASPIDIEJE — NEPH110DIUM. 27 triangular-ovate, their rachis narrowly winged; segments of the fourth order ovate, incised into coarse truncate-obtuse teeth, furfuraceous ; sori single at the base of the ultimate lobes; indusium reniform. Bagnio, Loher. Borneo. (33) N.simplici folium Hook. Rhizome creeping; stipes tufted, strong, villous upward, about 10 cm. high; frond 15 to 30 cm. high, with a lanceolate-acuminate, entire apex about 3 cm. broad, and at its base 1 to 6 small blunt, spreading, entire, distinct pinna1, subcoriaceous ; midrib hispid beneath, and the prominent veins slightly so, main veins 3 mm. apart, all the veinlets anastomosing; sori minute, indusium wanting. Leyte, Cuming 315. Fiji. (34) IM. Bakeri Harrington. Rhizome erect ( ?) ; stipes clustered, light brown, villous or scaly, 4 to 10 cm. high; frond oblong-oblanceolate, 1*0 to 15 cm. high, 2 to 3 cm. broad, obtuse, coarsely crenate or lobed one- third the distance to the costa, with usually 2 to 4 distinct oblong-obovate sessile pinnae at the base hardly as large as the lobes, papyraceous, villous; veinlets 6 to 8 pairs, the majority of them anastomosing; sori small, midway on the veinlets, the indusium hairy, often absent. Panay, terrestrial in the mountains, Steere. (35) N. canescens (Bl.) Christ. Rhizome creeping; stipe of sterile frond about 5 cm., of fertile about 20 cm. high, erect, villous above; rachis likewise villous; sterile frond 10 cm. more or less, high, ovate-lanceolate, acute, the terminal segment sometimes almost the whole length, sometimes much less than half, crenate; pinnae truncate at both ends, crenate or slightly lobed toward the broad apex, papyraceous, mostly glabrous; fertile frond similar except that the pinnae are usually narrower and occupy a relatively large part of the frond; sori near the main veins, or irregularly scattered, indusium usually absent. I follow Christ in referring this plant to Blume's Gymnogramme canescens, though our plants are largely glabrous. It is variable here as in Celebes (cf. Christ, Ann. Jard. Buitenz. 15:130). Isabela-Luzon, Warburg 11608, 11611; Nueva Vizcaya, Merrill 162; Rizal, Loher; Lamao, Merrill 3130, Copeland 250; Samar, Cuming 322; Davao, Copeland 503. Java, Celebes. (36) N. diversilobum Presl. Rhizome creeping or ascendent; stipe of sterile frond 10 cm., of fertile 20 cm. high; rachis very closely villous; frond 15 to 30 cm. high, lanceolate or ovate; pinnae opposite, acuminate, below their apex deeply and variously lobed, crenate near the truncate, sometimes auricled base, papyraceous, glabrous except for the costa; fertile frond the same, sori midway on the veinlets, exindusiate. Luzon, Cuming 51, 102; Negros and Davao, Copeland 83, 698. This and the preceding two species are very close together, and probably all very near ^V. parasiticum. (37) N. rubidum Hooker. Stipes firm, erect, glossy, reddish brown, naked; frond 30 to 50 cm. high, 30 cm. or more broad; pinnae numerous, 28 POLYPODIACE.E OF THE PHILIPPINE ISLANDS. the lowest stalked, 15 to 20 cm. long, 2 cm. broad, acuminate, entire or nearly so, subcoriaceous, glabrous; veinlets obscure, 8 to 10 on a side; sori- close to the main, veins, exindusiate. Luzon, Cuming; Camarines and Sorsogon, Baranda. Java and Borneo ( ? ) . (38) N. pteroides (Retz.) J. Sm. Rhizome hypogseous, creeping; stipe 30 to 60 cm. high, slender, almost naked; frond 40 to 80 cm. high, 30 to 40 cm. broad; pinnae spreading, 15 to 25 cm. long, 1 to 2 cm. broad, serrate with triangular teeth seldom one-third the depth to the midrib, papyraceo-herbaceous, rachis and veins somewhat hairy beneath; veinlets 5 to 8 on each side; sori confined to the margin of the teeth, indusiate. Rizal, Loher; Sorsogon, Baranda; Mindoro, Merrill 984; Culion, Merrill 484, 594; Mindanao, Cuming 293; Davao, Copeland 636. India and China to Queensland and Polynesia. (39) N. unitum R. Br. Stipes 30 to 50 cm. high, brownish, naked; frond 60 cm. or more high, 15 to 20 cm. broad; pinnae 10 to 15 cm. long, 1 to 2 cm. broad, cut from a third to half way down into spreading, triangular, acute lobes, coriaceous, the lower ones not dwindling down; veinlets 6 to 8 on each side; sori nearly terminal, principally in the lobes, indusium hairy. Luzon, Cuming 259. Pantropic. (40) N. aoristisorum (Harrington, in Journ. Linn. Soc. 16:30). Rhizome short and thick, with slender, brown scales ; stipes clustered, 8 to 15 cm. high, slender, gray slightly pubescent above; frond 15 to 25 cm. high, 2 to 4 cm. broad, linear-lanceolate, the lower pinnae reflexed; pinnae 20 to 40 pairs, 12 to 16 mm. long, half as broad, elliptical, slightly falcate, obtuse, coarsely crenate, auricled on the upper side, sessile or nearly so, subcoriaceous, pubescent beneath, as is the rachis; veinlets 2 or 3 on each side, of which but one usually anastomoses with the opposite one of the next lobe; sori not definitely bounded, the sporangia more or less scattered. Panay, terrestrial in mountains, Steere. (41) N. proliferum (Presl.). Rhizome stout, creeping; stipes spread- ing, naked, 5 to 20 cm. high; frond 30 to 60 cm. long, 15 to 30 cm. broad, erect or decumbent, often elongate and rooting at the point and branched copiously from the axils; pinnae 10 to 15 cm. long, 1 to 2 cm. broad, broadest at the truncate or cordate base, obtuse, bluntly lobed about 2 mm. deep, subcoriaceous, naked or nearly so; veinlets 6 to 10 on a side; sori medial, oval, sometimes confluent, exindusiate. Luzon, Cuming 168; Benguet, Loher. Africa to Polynesia. (42) N. urophyllum (Wall.) Beddome. Rhizome horizontal, short and stout; stipe 50 to 80 cm. high, erect, nearly naked; frond 60 cm. or more high, 30 to 50 cm. broad; pinnae rather few, 20 to 30 cm. long, about 5 cm. broad, acuminate, entire or crenate, sessile, papyraceous, ASPIDIEJE — NEPHRODIUM. 29 glabrous; veinlets about 15 pairs, the sori medial on them, forming two rows, or, near the midrib, terminal and forming a single row, exindusiate. Luzon, Baranda, Steere; Davao, Warburg 14171, Copeland 952. India to Queensland and Polynesia. (43) N. moulmeinense Beddome. Rhizome short, creeping; stipe 60 to 120 cm. high, erect, naked unless at the top; frond 60 to 120 cm. high, 40 to 60 cm. broad; pinnae usually more than 6 on each side, 20 to 30 cm. long, scarcely 4 cm. broad, long-acuminate, entire or crenate or more often serrate with falcate teeth 2 to 3 mm. deep, abruptly contracted to the sessile or subsessile base, subcoriaceous, glabrous or nearly so, smooth; veinlets about 15 on a side; sori medial on them, mostly with a visible indusium. Rizal, Loher; Mindoro, Merrill 997; Zamboanga, Copeland; Davao, Copeland 1240, called "Saiop" in Bagobo. India and Malaya. This species differs typically from the preceding in being of firmer texture, with more numerous, narrower, and more uniformly narrow pinnae with less entire margin, more numerous main veins, and indusia; in practice, they are not very distinct. (44) N. extensum (Bl.) Hooker. Stipe 30 to 60 cm. high, naked or nearly so, brownish; frond 60 to 120 cm. high, 30 to 50 cm. broad; pinnae 15 to 25 cm. long, about 2 cm. broad, cut down about two-thirds of the way to the rachis into linear-oblong lobes, papyraceo-herbaceous, naked or nearly so; veinlets 6 to 8 on each side, often only the lowest pair united; sori nearly terminal, not confined to the lobes, indusiate. Rizal, Loher; Albay, Baranda. India, Malacca. (45) N. Otaria Baker (Anisocampium Cumingianum Presl.). Stipe 15 to 30 cm. high, substramineous ; frond 30 cm. or more high, with a linear-oblong terminal pinna 10 to 15 cm. long, 2 to 4 cm. broad, acuminate, lobed one-fourth to one-third of the way to the midrib into finely serrate lanceolate lobes, and 3 to 6 distant, spreading, similar lateral pinna on each side, the lower ones stalked, thinly herbaceous, glabrous; veinlets 6 to 8 on each side, the lowest uniting midway between the midrib and the edge; indusia present. Luzon, Cuming 239. India. (46) N. aridum (Don) Baker. Stipe 30 cm. or more high, erect, naked ; frond about 100 cm. high, 30 to 50 cm. broad; pinnae 15 to 25 cm. long, about 3 cm. broad, cut about one-third of the way down to the midrib into subtriangular, acute lobes, coriaceous, glabrous or slightly hairy; veinlets 8 to 10 on a side; sori in rows about midway between midrib and margin. Luzon, Cuming 278. India, Malaya. (47) N. cucullatum (Blume) Baker. Rhizome wide-creeping; stipe 30 cm. or more high, erect, brownish, nearly naked; frond 40 to 80 cm. high, 20 to 30 cm. broad; pinnae close, 10 to 15 cm. long, 1 to 2 cm. 30 POLYPODIACE-SJ OF THE PHILIPPINE ISLANDS. broad, cut down one-third of the way to the midrib into triangular, acute, subfalcate lobes, the lower ones dwindling down suddenly to mere auricles, coriaceous, lower surface, like the rachis, densely pubescent; 8 to 10 veinlets on each side; sori subterminal, indusiate. Luzon, Cuming 254; Cagayan-Luzon, Warburg 12206, 12212; Lepanto and Rizal, Loher; Nueva Ecija, Merrill 283, 284; Benguet, Elmer 6486; Mindoro, Merrill 879; Davao, Warburg 14097, Copeland 326, 447. India across Polynesia. (48) N. loherianum (Christ, Bull. Herb. Boiss. 6:191). Rhizome creeping; stipes subtufted, 30 cm. high, sparsely scaly at the base, densely but closely strigose-pubescent above, as are the rachis and veins; frond deltoid-ovate ( aside from some auricles representing the lowest pinnae), 30 cm. high, 18 to 20 cm. broad, acuminate; pinnae 10 cm. long, 2 cm. broad, horizontal, lanceolate, acuminate, sessile, cleft down to 3 mm. from the midrib into obtuse, oblong, falcate lobes 3 mm. broad, subcoriaceous, short-pilose, ash-brown; veinlets about 12 pairs, only the lowest anastomosing, and these not always; sori small, marginal, crowded, with pilose indusia. Montalban, Rizal, Loher. (49) N. invisum Carruth. Rhizome stout, wide-creeping; stipe 30 cm. or more high, stout, brownish, villous; frond 45 to 60 cm. high, 20 to 30 cm. broad; pinnae numerous, 10 to 15 cm. long, 1 cm. or more broad, cut about one-third of the way to the midrib into sharp, triangular, falcate lobes, subcoriaceous, the lower ones distant and dwarfed; rachis and lower surface villous; veinlets 6 to 8 on each side; sori in rows close to the midrib, indusiate; capsules setose. Mount Mariveles, Warburg 12759; Tayabas, Warburg 12509. Polynesia. (50) N. hirsutum J. SHI., Presl. Stipes 100 cm. more or less high, scaly at the base, closely hirsute toward the top; frond 100 to 200 cm. high, 50 cm. or more broad; pinnae 20 to 35 cm. long, narrowly linear, acumi- nate, incised about half way to the midrib into obtuse, falcate lobes, subcoriaceous, closely glandular beneath; rachis densely but closely hirsute, surfaces very sparsely hairy; veinlets about 8 on each side; sori medial on them. Luzon, Cuming 82; San Ramon, Copeland 751, a form with about 13 veinlets on each side, the sori reaching most of their length. Celebes. (51) N. glandulosum J. Sm. Stipes tufted, 30 cm. or more long, naked or slightly villous; frond 30 cm. or more high, 10 to 15 cm. broad; pinnae 8 to 10 pairs, spreading, larger and closer on the sterile frond, 6 to 10 cm. long, 2 to 3 cm. broad, entire or nearly so, truncate and sometimes auricled at the base, papyraceo-herbaceous ; rachis and lower surface naked or slightly villous, sometimes glandular; fertile pinnae somewhat contracted; veinlets 4 to 8 on a side, with the sori close to the midrib, indusiate. Near N. urophyllum. Luzon, Cuming 16; Leyte, Cuming 298. Malaya. ASPIDIEJE — NEPHIIODIUM. 3 1 (52) N. philippinense Baker, in Ann. Bot. 5:327. Frond oblong- lanceolate, bipinnatifid, 60 to 90 cm. high, 30 to 45 cm. broad, glabrous throughout; pinnae lanceolate-acuminate about 20 cm. long by 3 cm. broad, cut down less than half way to the rachis into oblong, erecto-patent lobes, moderately firm, the lower ones not dwarfed; veinlets 8 to 9 pairs;- sori medial, with firm, glabrous, persistent indusia. Near N. Arbuscula. Luzon, Cuming 10, 84; Benguet and Rizal, Loher; Cebu, Cuming 338. (53) N. lati pinna Hooker. Stipes tufted, 10 to 15 cm. high, slender, naked; frond 20 to 30 cm. high, 8 to 12 cm. broad, the upper third or half lanceolate, pinnatifid with broad oblong lobes; below this several pinna on each side, the largest 5 to 8 cm. long, about 2 cm. broad, cut about one-fourth of the way down into broad, oblong, subfalcate lobes, papyraceo-herbaceous, the lower ones much reduced and distant; rachis and sides glabrous; 3 to 5 distant veinlets on each side, with a sorus about the middle of each. Doubtfully distinct from N. parasiticum. Isabela-Luzon, Warburg 11599, 11604, 11610, 11979; Manila, Warburg 12747. Hongkong, Java. (54) N. amboinense Presl. Stipes tufted, 15 to 20 cm. high, grayish, nearly naked; fronds 60 cm. or more high, 20 to 30 cm. broad; pinnae spreading, about 10 cm. long, 1 to 2 cm. broad, cut one-fourth of the way to the midrib into obtuse, slightly falcate lobes, papyraceo-herbaceous, the lower shorter and deflexed ; rachis and lower surface slightly pubescent ; veinlets 4 to 6 on a side; sori in rows close to the midrib. Luzon, Cuming 83; Leyte, Cuming 317. India and Malaya. (55) N. Arbuscula Desv. Stipes tufted, 10 to 20 cm. high, naked or slightly pubescent; frond 30 to 50 cm. high, 15 to 20 cm. broad; pinnae close, numerous, about 10 cm. long by 1 cm. broad, cut not more than one-fourth of the way to the midrib into obtuse lobes, herbaceous, several of the lower pairs short and distant; rachis and lower side finely villous; veinlets distant, 3 or 4 on a side; sori in close rows. "Philippines." India to Polynesia. (56) N. pennigerum (Bl.) Hooker. Stipes tufted, stout, 20 to 30 cm. high, finely villous; frond 60 to 120 cm. high, 30 to 50 cm. broad; pinnae numerous, spreading, 15 to 25 cm. long, about 3 cm. broad, acuminate, cut about one-fourth of the way to the midrib into oblong, falcate lobes, herbaceous or subcoriaceous, the lower ones dwarfed and distant; rachis and under surface finely villous; veinlets 6 to 9 on a side, the sori medial on them, indusiate; capsules setose. Near N. moulmeinense. Baguio, Loher. Africa, India, Malaya. (57) N. hispidulum Baker. Stipes tufted, slender, 30 to 50 cm. high, grayish, villous; frond 30 to 50 cm. high, 15 cm. broad; pinnae distant, spreading, about 10 cm. long, 1 cm. broad, acuminate, cut about half 32 POLYPODIACE^S OF THE PHILIPPINE ISLANDS. way to the midrib into oblong, slightly falcate lobes, the lower pinnae suddenly dwarfed to mere auricles; rachis and under surface finely villous; veinlets 3 to 4 on each side, with a large sorus on each near the margin, indusiate; capsules naked. Luzon, Cuming 268; "Philippines," Baranda. Malaya. (58) N. ferox Moore. Stipe 30 to 80 cm. high, strong, densely fibrillose with black hairs which leave the stipe rough when they fall ; frond 90 to 150 cm. high, 60 cm. broad; pinnae rather close, spreading, 15 to 40 cm. long, 2 to 3 cm. broad, very acuminate, cut about one-third of the way to the midrib into lanceolate-falcate lobes, subcoriaceous, glabrous and glossy; veinlets 10 to 12 on each side; sori close to the main veins. Benguet, Loher, Topping, 162, 320, Elmer 6232; Albay, Baranda. Malaya. (59) N. parasiticum (L.) Baker. Rhizome short; stipes tufted, 30 cm. high, slender, deciduously hairy; frond 30 to 60 cm. high, 30 cm. broad; pinnae spreading, 10 to 15 cm. long, 2 cm. broad, obtuse or acuminate, cut about half way to the midrib into subfalcate obtuse lobes, truncate at the base, herbaceous, finely villous, the lower ones deflexed, usually distant and rather shorter; veinlets 6 to 8 on each side; sori medial, indusiate. Isabela-Luzon, Warburg 11976; Benguet, Topping 319; Rizal, Loher; Mount Mariveles, Copeland 226, 1389; Albay and Masbate, Baranda; Culion, Merrill 589; Davao, Warburg 14096. All warm countries. (60) N. truncatum Presl. Stipes tufted, stout, erect, 60 cm. high, grayish, naked or slightly villous; frond 60 to 120 cm. high, 30 to 50 cm. broad; pinnae 15 to 25 cm. long, 2 to 3 cm. broad, very obtuse, cut down one-third of the distance to the midrib, more deeply toward the apex, into obtuse, spreading, oblong lobes, papyraceo-herbaceous, glabrous or nearly so; rachis slightly villous; veinlets 6 to 8 on each side, with a sorus near the base of each. This includes N. caudiculatum Sieb. and N. abruptum J. Sm. Luzon, Cuming 120, Steere, Baranda; Leyte, Cuming 317. India across Polynesia. (5) MENISCIUM Schreber. Fronds simple or once pinnate; veins anastomosing as in Goniopteris, the veinlets from adjacent veins uniting in pairs, and from the points of fusion veinlets running toward the margin parallel to the main veins; sori elongate along the cross-veinlets, exindusiate. A small genus of terrestrial ferns, very closely related to yephrodium, with which it is perhaps better combined. (1) M. triphyllum Swartz. Rhizome wide-creeping, the younger part scaly; stipes slender, 20 to 30 cm. high, stramineous, slightly pubescent; fronds simple, oblanceolate, 10 to 15 cm. high, 1, 5 to 2 cm. broad, acute, repand, auricled at the base ; or the auricles becoming free, as distinct ASPIDIE^E — MEN1SCIUM. 33 pinnules, herbaceous, slightly pubescent on the veins beneath; areolae 5 to 9 between costa and margin. The simple form is M. simplex Hooker. Isabela-Luzon, Warburg 11609; Leyte, Cuming 299; Negros, Cope- land 76. India to Java and Formosa. (2) M. cuspidatum Blume. Stipe 30 to 100 cm. high, brownish, naked; frond 40 to 100 cm. high, with few scattered pinn*, the terminal like the lateral; pinnse erecto-patent, about 15 cm. long by 3 cm. broad, caudate-acuminate, usually falcate at the end, nearly entire, short stalked or sessile, subcoriaceous, glabrous or nearly so, dark green above, with rows of light or reddish dots marking the excurrent veinlets. This species is very near Nephrodium urophyllum, but must be specifically distinct even if -the genera were united. Luzon, Cuming 178; Mount Mariveles, Whitford 272; Leyte, Cuming 314; Mindoro, Cuming 361. Himalayas, Java. (6) ASPIDIUM Swartz. Fertile and sterile fronds alike or nearly so, inclined toward a triangular shape, and the pinnae toward a stronger development of the basiscopic side; texture moderately thin; veins anastomosing irregularly, usually very copiously, with or without free included veinlets; sori nearly always round, on a distinct receptacle; indusium peltate, reniform or wanting. An almost exclusively tropical genus of terrestrial ferns, whose greatest development is reached in this region; intimately related, through Pleocne- mia, to Nephrodium. The most of our species seem to be of very local occurrence, and not even locally abundant; the number of species still to be discovered is therefore probably large. The arrangement of the species adopted here is probably artificial, and it is therefore undesirable to raise any of these groups (unless it be Pleoonemia) to generic rank. 1. Veins anastomosing very copiously. 2. Indusium wanting, Arcypteris. 3. Fronds simple. 4. Lowest lobes entire (1) A. Bryanti 4. Lowest lobes forked or lobed (2) A. Barberi 3. Fronds pinnate. 4. Sori in rows along main veins. 5. Pinnae mostly entire (2) A. Barberi 5. Pinnae pinnatifld (3) A. macrodon 4. Sori strictly marginal (4) A. Brogniartii 4. Sori scattered. 5. Pinnse entire or once forked (5) A. lamaoense 5. Pinnae pinnately lobed. 6. Veinlets inconspicuous (6) A. difforme 6. Veinlets very conspicuous above (7) A. Whitfordi 2. Indusium reniform, Sagenia. 3. Sori in rows along main veins. 4. Frond not compound. 5. Rhizome erect (8) A. heterodon 5. Rhizome creeping (9) A. decurrens 24036- 3 34 POLYPODL\CE;E OF THE PHILIPPINE ISLANDS. 4. Frond pinnate. 5. Margin of pinnae nearly entire. 6. Apex of frond entire (10) A. persoriferum 6. Apex pinnatifld (11) A. pachyphyllum 6. Apex trifld (12) A. grande 5. Pinnae pinnatifld. 6. With free included veinlets.. (13) A. siifoUum 6. Without free included vein- lets (14) A. cicutarium 3. Sori scattered. 4. Frond simple, pinnatifld (15) A. vastum 4. Frond pinnate. 5. Terminal pinna deeply pinnatifld.. (16) A. melanocaulon 5. Terminal pinna lobed at base (17) A. irriguum 5. Terminal pinna merely sinuate.... (18) A. Menyanthidis 2. Indusium peltate, Tectaria. 3. Lowest pinnae forked (19) A. repandum 3. Lowest pinnae pinnate : (20) A. calcareum 1. Veinlets forming costal areolae, and a few others along the main veins, Pleocnemia. 2. Caudex not subarborescent. 3. Sori round. 4. Indusium peltate (21) A. membranaceum 4. Indusium reniform. 5. Frond bi-tripinnate (22) A. giganteum 5. Frond simple (23) A. heterophyllum 3. Sorus oblong (24) A. ambiguum 2. Caudex subarborescent (25) A. leuzeanum (1) A. Bryanti Copeland. Stipe 20 to 40 cm. high, bearing sparse horizontal scales on the back, and on each side a uniform wing 1 cm., more or less, broad, which is truncate near the base of the stipe; frond 30 to 50 cm. high, ovate, trifid with close lateral lobes or more often quinquefid with the lower lobes remote and connected by a broad wing; apical segment 20 to 30 cm. high, about 10 cm. broad, acuminate, entire or subrepand, papyraceous, glabrous; lateral segments similar but smaller; primary veins curved, almost reaching the margin, connected by conspic- uous, arched cross-veinlets, the large, regular areolse thus formed divided into small, irregular ones with free included veinlets; sori mostly in rows^ along the main veins ; indusium none or fugacious. Terrestrial in forest near Gimogon River, Negros, Copeland 82. (2) A. Barberi (Hooker). Stipes tufted, 15 to 30 cm. high, slightly scaly at the base; frond palmately 5-lobed, or more usually pinnate with a large terminal segment and 1 to 4 pairs of pinnae, the upper ones oblong-lanceolate, 10 to 15 cm. long, 2 to 3 cm. broad, nearly entire, the lowest pair with a deep lanceolate lobe at the base on the lower side, subcoriaceous, glabrous; areolae rather large and regular, with copious free veinlets; sori copious, principally in two rows near the main veins. Majayjay, Loher. Malaya. (3) A. macrqdon (Reinw.) Diels. Rhizome decumbent; stipe 30 cm. or more high, slightly scaly below; frond 60 to 100 cm. high, half as broad, the apex deeply pinnatifid, below this numerous lanceolate pinnae, the lowest sometimes 30 cm. long, deltoid, cut down to a narrow wing IDIUM. 35 into pinnatifid, close, lanceolate pinnules, thin, glabrous; areolae copious, without free veinlets; sori small, in rows near the main veins. Luzon, Cuming 9, 114. Malaya and Polynesia. (4) A. Brogniartii (Bory) Diels. Rhizome short, erect, densely scaly at the top; stipe 30 cm. or more high, dark brown at the base, lighter above and glabrous; frond 50 to 100 cm. high, half as broad, apex pin- natifid into deep, repand or lobed segments; below this numerous distinct pinnae, the lowest 15 to 20 cm. long, lanceolate-deltoid, lobed throughout into broadly lanceolate lobes of which all except the lowest basipetal one are entire or nearly so, subcoriaceous, glabrous; areolae copious, with few or no free veinlets; sori rather small, quite confined to the margin. Rizal, Lohcr; Albay, Camarines and Masbate, Baranda; Negros, Copeland. Malaya. (5) A. lamaoense Copeland. Rhizome ascending; stipe 15 to 25 cm. high, with a few small, lanceolate scales at the base, fibrillose near the top, like the rachis; frond 15 to 25 cm. high, deltoid, usually trifoliate, with a deeply tripartite apical segment, less often with the apical segment entire, or with an extra pair of entire pinnae intercalated; lowest pinnae short-stalked, about 10 cm. long, furcate with the smaller, lower segment distant, herbaceous, glabrous, margin entire; areolae with free veins; sori copious, irregularly scattered, round or elongate, exindusiate, bright, deep red. On bowlders in creek bed, Lamao Forest Reserve, Luzon, Copeland 223. This may not be distinct from A. irriguum. (6) A. difforme Blume. Stipes tufted, erect; 30 cm. or more high, scaly near the base; frond 1 m., more or less, high, at least half as broad; upper pinnae lanceolate, nearly entire or with broad obtuse or falcate lobes reaching half way to. the costa; lower pinnae often deltoid, with the lobes of the lower side prolonged and pinnatifid, subcoriaceous, glabrous; areolae copious with few free veinlets; sori very copious, scattered. Isabela-Luzon, Warburg 11589; Rizal and Laguna, Loher; Culion, Merrill G65; Davao, Warburg 14132. Malaya. (7) A. Whitfordi Copeland. Rhizome suberect, very short, densely scaly at the apex; stipe 20 to 30 cm. high, dark brown at the base and clothed with linear scales, lighter above and glabrous; frond 30 to 40 cm. high, deltoid, acuminate, papyraceous, glabrous, olive green, the white veins conspicuous on the upper surface; apex pinnatifid, the segments broadly crenate and obscurely serrate; below this about 6 free pinnae on each side, erecto-patent, acuminate, lanceolate, pinnatifid more or less than half way to the rachis into oblong, obtuse, entire or serrate lobes, lower pinnae stalked; lowest ones deltoid, with one free basiscopic pinnule resembling one of the upper pinnae; veins laxly anastomosing, without free included veinlets; sori round or oblong, irregularly scattered but wanting near the costa, exindusiate. Lamao Forest Reserve, near the river, Luzon, Whitford 201. 36 POLYPODIACE^E OP THE PHILIPPINE ISLANDS. (8) A. heterodon Copeland. Rhizome short, erect, woody; stipe 15 to 20 cm. high, glabrescent, bearing on each side a wing about 5 mm. broad at the top, attenuate to the base; frond 20 to 30 cm. high, 3 or 5 partite, herbaceous, glabrous; apical segment oblanceolate, 4 to 5 cm. broad, acu- minate, serrate with irregular teeth 0 to 10 mm. long; lateral lobes smaller, erecto-patent, less conspicuously serrate; primary veins reaching the margin; areolae irregular with free included veinlets; sori large, in rows along the main veins; indusium reniform, persistent. Terrestrial in forest near Catalonan, Davao, Copeland 951. (9) A. decurrens Presl. Rhizome creeping; stipe with a few scattered paleae, and on each side a wTing 5 to 10 mm. broad at the top attenuate almost to the base; frond 50 to 100 cm. high, 30 cm. or more broad, cut down to a broadly winged axis into 4 to 8 pairs of usually crenate lance- olate segments 10 to 20 cm. long the lowest of which are sometimes forked, herbaceous, glabrous; main veins distinct to the margin; areolae copious, with free included veinlets; sori large, in regular rows along the main veins; indusia reniform. Luzon, Cuming 148; Rizal, Loher; Sorsogon and Catanduanes, Baranda; Mindoro, Merrill 1773; Davao, Copeland 967. India to Polynesia. (10) A. persoriferum Copeland. Rhizome short, ascending; stipe 40 to 60 cm. high, stramineous or brown, clothed at the base with lanceolate, arcuate palese 12 mm. long, glabrous above, like the rachis; frond 30 to 50 cm. high, ovate, pinnate, the sterile the more ample; apical part about 25 cm. high, 7 cm. broad, acuminate, entire or subrepand, subcoria- ceous, glabrous; lateral pinnae about 3 pairs, sessile, erecto-patent, subar- cuate, lanceolate, 15 to 20 cm. long; fertile pinnae smaller, about 10 cm. long, 2 cm. broad, obscurely crenate, the lowest stalked; main veins almost reaching the margin; areolse irregular with free included veinlets; sori in rows along the main veins, almost covering the entire lamina ; indusium reniform, very persistent. River bank near Catalonan, Davao, Copeland 929. (11) A. pachyphyllum Kunze. Rhizome short, apparently erect; stipe 30 cm. or more high, brownish, naked; from 60 to 100 cm. high, half as broad, with a subdecurrent terminal part deeply pinnatifid at its base and entire or sinuate above, and 4 to 8 erecto-patent lateral pinnae on each side, acuminate, subcoriaceous, glabrous, the lower ones with a long fork on the lower side; main veins almost reaching the margin; free included veinlets copious; sori large, in fairly regular rows; indusium reniform. (A. platyphyllum Presl.) . Cuming, Luzon, 224; Cebu, 339 and 340; Panay (?) 356 in part; Min- danao, 290; Benguet, Topping 337, 338; Elmer, 6171. Malaya and Polynesia. (12) A. grande J. Sm., Mett. Stipe rufescent, shining; frond 1 m. high, pinnate; apex deeply 3-lobed, composed of "three confluent pinnae;" pinnae 5 to 6 pairs, 25 cm. long, 6 cm. broad, oblong-lanceolate, caudate- acuminate, subsinuate, membranaceous, glabrous, the lowest stalked, ASPIDIE^E — ASPIDIUM. 37 cuneate at the base, unequally bipartite; venation of Drynaria; sori in rows close to the main veins, large; indusium reniform, plane, coriaceous. "Luzon?" Cuming s. n., or No. 356 fide Baker, or Panay, s. n., fide Presl sub. A. grandifolio. The description does not show wherein this is sufficiently distinct from A. pachyphyllum. (13) A. siifolium (Willd.) Mett. Stipe 30 cm. or more high, brownish, naked; frond 30 cm. or more high, 15 to 20 cm. broad, with a broad, oblong, acuminate terminal pinna, and 3 to 4 lateral ones on each side, the lowest stalked, 8 to 10 cm. long, 5 cm. broad, forked at the base and rather deeply lobed, subcoriaceous; main veins close, distinct to the margin; areola^ fine, with free included veinlets; sori large, in rows close to the main veins, often confluent. Luzon, Cuming 4.1 Java and Sumatra. (14) A. cicutarium (L.) Sw. Rhizome ascending; stipe 30 cm. or more high, bearing scattered deciduous, spreading paleae; frond 80 cm. more or less high, subdeltoid, apex deeply pinnatifid; below this, 3 to 6 pinnae on each side, papyraceo-herbaceous or subcoriaceous, glabrous unless on the midribs, the lowest pinnae subdeltoid, deeply pinnatifid or pinnate below; main veins distinct to near the margin; areolse with few or no free included veinlets; sori rather large, in rows near the main veins; indusium round-reniform. Isabela-Luzon, Warburg 11973; Mount Mariveles, Loher, Copeland 217; Davao, Warburg 14166. Pantropic. Exceedingly variable. (15) A. vastum Blume. Rhizome creeping; stipes scattered, narrowly winged often nearly or quite to the base; frond 1 m., more or less, high, 30 cm. or more broad, cut down to the very broadly winged rachis into entire, linear-oblong segments 15 to 30 cm. long, 3 to 5 cm. broad, papyraceo-herbaceous or subcoriaceous; main veins distinct three-fourths of the way to the margin; areolae copious, with free included veinlets; sori small, scattered. Panay, Cuming 356 in part. India and Malaya. (16) A. melanocaulon Blume. Rhizome ascending; stipe 30 cm. or more high, ebeneous, glossy, scaly at the base; frond 30 to 60 cm. high, ovate-deltoid, with a large, deeply pinnatifid terminal pinna, and 1 to 4 lateral ones on each side, the central one deeply pinnatifid with ovate- acuminate lobes, the lowest stalked, 15 to 30 cm. long, 10 to 15 cm. broad, often again pinnate at the base, papyraceo-herbaceous; main veins reaching the margin; areolse fine, with free included veinlets; sori numerous, minute, scattered; indusium fimbriate, fugacious. Luzon, Cuming 57. Malaya. 1 This is inserted here on the authority of the Synopsis Filicum, p. 299. A sterile frond in our herbarium strongly suggests Arcypteris, and both Smith and Hooker (Sp. Fil. V:86) treated this plant as exindusiate. 38 POLYPODIACE^ OF THE PHILIPPINE ISLANDS. (17) A. irriguum J. Sm., Presl. Stipes tufted, 10 to 15 cm. high, grayish, finely villose; frond 15 to 25 cm. high, 10 to 15 cm. broad, subdeltoid, with a large oblong, terminal pinna with a pair of deep lanceolate lobes at the base, and below this 1 to 2 pairs of slightly sinuate lateral pinnae, the lowest forked at the base, papyraceo-herbaceous ; main veins flexuose; areolae fine, with free included veinhjts; sori small, scattered, often confluent; indusium small, fugacious. Luzon, Cuming 31; Rizal, Loher. (18) A. Menyanthidis Presl. Rhizome creeping; stipe 15 to 30 cm. high, brownish, naked; frond 30 to 60 cm. high, 30 cm. or more broad, with an acuminate, oblong-lanceolate, sinuate terminal pinna 15 to 30 cm. long, 2 to 4 cm. broad, and 2 to 4 similar ones on each side, the lowest stalked, sometimes forked, subcoriaceous ; main veins, close, conspicuous, reaching the margin; areolae fine, with copious free veinlets; sori small, scattered, all on the connected veinlets. Sorsogon, Haenke; southern Camarines, Cuming 183 in part; Sorsogon, Baranda. New Guinea, Solomon Islands. (19) A. repandum Willd. Stipe 30 to 60 cm. high, grayish brown, naked; frond 60 cm. or more high, 30 to 45 cm. broad, the apex deeply pinnatifid, with linear-oblong, slightly sinuate lobes; below this 4 to 8 pinnae on each side, 15 to 20 cm. long, about 3 cm. broad, acuminate, narrowed to the base, sinuate, subcoriaceous, the lowest stalked and forked; main veins distinct to the margin; areolse copious with free veinlets; sori in distinct rows near the main veins; indusium orbicular, peltate, 1 mm. broad. Luzon, Cuming 183 in part; Sorsogon and Catanduanes, Baranda. (20) A. calcareum Presl. Rhizome subcreeping; stipe 10 to 15 cm. high, naked; frond 30 cm. or more high, ovate-lanceolate, with acuminate pinnatifid apex, and below it 4 to 6 distant, stalked pinnae on each side, the lowest deltoid, 15 cm. long, cut down to the rachis below into stalked lanceolate-acuminate, deeply and obtusely lobed pinnules, subcoriaceous; areolae not very abundant and mainly costular; indusium orbicular. Leyte, Cuming 310. (21) A. membranaceum Hooker. Rhizome ascending, with a mass of black paleae at the apex; stipes tufted, about 30 cm. high, nearly naked, with a few spreading linear paleae below; frond about as high as the stipe, deltoid, acuminate, membranous, puberulous especially beneath; upper part subbipinnatifid, free pinnae 5 to 7, lowest much the largest, subdeltoid, 10 to 20 cm. long, pinnules on the lower side much the larger, pinatifid into obong, entire or crenate segments; veins anastomosing principally in costal arches; sori copious, mostly marginal in the lobes. "Philippines," Cuming; Arayat, 800 m., Loher; Davao, Copeland 898. China, Formosa, Java, Ceylon. (22) A. giganteum Blume. Stipe 30 to 60 cm. high, brown, glossy; frond 30 to 60 cm. high, broadly deltoid, with pinnatifid apex and 4 to 5 pairs of pinnae of which the upper are decurrent, the lower stalked; ASPIDIUM. 39 lowest pinnae very large, obliquely deltoid, pinnules on its basiscopic side prolonged, and at least deeply pinnatifid in turn; veinlets anastomosing at least near the midribs, without sterile included veinlets; indusia subcorda^e. I suppose that Xephrodium (Pleocnemia) giganteum Baker is our Philippine plant; if it is distinct from A. giganteum Blume, Baker's name can not stand. Leyte, Cuming?; Camarines and Albay, Baranda. (23) A. heterophyllum Mett. Ehizome creeping; stipe 5 to 10 cm. high, densely villous; frond 10 to 15 cm. high, linear-oblong, simple, with obtuse, oblong, slightly falcate lobes reaching one-fourth of the way to the costa, coriaceous, villous on both surfaces, but especially on the margin and costa beneath; anastomoses of the veinlets not very regular, but suggesting Goniopteris; sori midway the veins and the margin of the lobes. Apparently related to Nephrodium canescens. Samar, Cuming 322. (24) A. ambiguum (Hooker) Diels. Stipe slender, nearly naked; frond 40 to 60 cm. high, 30 cm. broad, oblong-deltoid, bipinnatifid; pinnae lance- olate, 10 to 15 cm. long, 3 cm. broad, the lower ones slightly stalked, cut half way or more to the rachis into linear-oblong lobes, the fertile ones contracted, thinly herbaceous, dark green, rachis and both sides thinly clothed with long, jointed hairs; veinlets of the lobes often forked, the lower ones forming costular areolae; sori oblong, confluent when the veins fork; indusium none. Luzon, Cuming 154 (Samar, Cuming 321?). (25) A. leuzeanum (Presl) Kunze. Rhizome erect, usually short but sometimes arborescent, densely scaly at the crown; stipe 1 m., more or less, long, stout, striate; frond 1 to 2 m. long, subdeltoid; pinnae 30 to 50 cm. long, 15 to 25 cm. broad, upper ones simple, lowest ones pinnate on the basiscopic side, and the large pinnules pinnatifid; segments 10 cm. long, 2 to 3 cm. broad, subfalcate, entire or sinuate; veinlets anastomosing sparsely and irregularly, rarely free; sori in single close rows; indusia orbicular-cordate, fugacious. Luzon, Cuming 33, 34, 107; Rizal and Laguna, Loher; Mindanao, Cuming 289. India and China to Polynesia. (7) POLYBOTRYA H., B. and K. Fronds at least pinnate, the fertile much contracted; veins free in the Philippine species; sori originating in a receptacle on the veins, almost or entirely covering the under surface, exindusiate. Our species are rather small terrestrial ferns. 1. Pinnae not articulate to rachis. 2. Setae projecting between teeth .' (1) P. appendiculata 2. Without setae. 3. Frond bipinnatifid (2) P. stenosemioides 3. Frond bi- or tripinnate (3) P. apiifolia 1. Pinnae articulate to rachis .... _ (4) P. articulata 40 POLYPODIACE^B OF THE PHILIPPINE ISLANDS. (1) P. appendiculata (Willd.) Blume. Rhizome short, creeping; stipe of sterile frond 10 to 20 cm. high, of fertile 20 to 40 cm., erect, scaly throughout, as is often the rachis; sterile frond 40 to 70 cm. long, apex usually rooting; pinnae about 5 cm. long in the middle of the frond, horizontal, lanceolate, acute, simply or doubly serrate with the tip of a vein excurrent from the sinus between each two main teeth, abruptly contracted at the base, sometimes auricled on the upper side, papyraceous, glabrous; fertile frond shorter and narrower, with obtuse pinnae, the lower ones stalked; pinnae often rolled up in fruit and appearing to be entirely covered by the sori. Mount Arayat, Loher; Benguet, Topping 340, Elmer 6457; Mount Mari- veles, Warburg 12508, Copeland 245. India and Malaya, Hongkong. (2) P. stenosemioides Baker sub Achrosticho. Stipes high, chestnut, with a few lanceolate scales toward the base; sterile frond 30 to 45 cm. high, 20 cm. broad, bipinnatifid, submembranaceous, glabrous except for a few deciduous hyaline paleae on the margin; pinnae sessile, 10 cm. long, 3 cm. broad, numerous, pinnatifid to a broadly winged costa into oblong, obtuse segments 5 mm. broad; fertile frond similar, but with a longer stipe, nearly 60 cm., and smaller and more lax pinnse. Rizal, Loher. Sarawak. (3) P. apii folia Hooker. Rhizome short, stout, erect; stipe of sterile frond 2 to 7 cm. high, of fertile 15 to 20 cm. the former densely, the latter very sparsely fibrillose; sterile frond 8 to 15 cm. high, 4 to 12 cm. broad, bi- or tripinnate; pinnae close, rhomboidal, they or their divisions more dissected at the base than in the part above, where they are broader, only the lowest pair ever with pinnate pinnules, rather obtuse, with entire or dentate margin, herbaceous, glabrous beneath except on the midribs; ultimate divisions of the fertile frond reduced to isolated orbicular or globose, beadlike bodies 1 to 2 mm. in diameter. Luzon, Cuming 26, Lobb; Rizal, Loher; Lamao Forest Reserve, Merrill 3129, Barnes F. B. 73, Copeland; Masbate and Bataan Id., Baranda. (4) P. articulata J. Sm. Stipe 30 cm. high, firm, erect, nearly naked; sterile frond 30 to 80 cm. high, 20 to 30 cm. broad, bipinnate; pinnse articulate to the rachis, narrowly lanceolate; pinnules unequal-sided, oblong, obtuse, crenate, auricled on the upper side, subcoriaceous, glabrous ; pinnse of fertile frond 10 cm. long, linear-cylindrical, auricled on the upper side. Leyte, Cuming 296. Celebes across Melanesia. (8) STENOSEMIA Presl. Sterile frond ample, fertile reduced to linear segments, both broadly trifoliate in plan; basiscopic side of lower pinnae strongly developed; veinlets anastomosing to form areolse along the midribs and main veins, free toward the margin, without included veinlets; sori eventually covering the dorsal or both surfaces. Indusium none. ASPIDIE^ — STEXOSEMIA. 41 (1) S. aurita Presl. Rhizome erect, short; stipe of sterile frond 15 to 20 cm. high, of fertile 20 to 30 cm., ebeneous, bearing a few lax palese; sterile frond 8 to 20 cm. high and broad, its central part deeply pinnatifid with entire, or obtusely serrate, lanceolate lobes; lateral pinnae very unequal sided, with lowest basiscopic segment pinnatifid, membranaceous, glabrous or with scattered hairs, especially on the veins; fertile on the same plan as the sterile, but rather smaller and the segments hardly over 1 mm. broad; terrestrial. Leyte, Cuming 295; Zamboanga, Copeland 738; Davao, Warburg 14170, Copeland 957. Malaya to Polynesia. (9) GYMNOPTERIS Bernhardi. Rhizome usually creeping; frond simple or pinnate, the fertile much contracted; veinlets copiously anastomosing, with, or less frequently with- out, free included veinlets; sori covering the entire dorsal surface, exindu- siate. Mostly terrestrial ferns of small or moderate stature. 1. Sterile frond simple, entire, or nearly so. 2. Main veins evident nearly to the margin. 3. Free included veinlets usually wanting (1) G. Unnaeana 3. Free included veinlets copious (2) G. variabilis 2. Main veins obscure, short, or none. 3. Sterile frond about 5 cm. long (3) G. minor 3. Sterile frond 15 cm. or more long. 4. Rhizome creeping (4) G. lanceolata 4. Rhizome scandent (5) G. axillaris 1. Sterile frond typically trifld (6) G. taccaefolia 1. Sterile frond typically pinnate. 2. Lateral pinnas but one pair (7) G. flagellifera 2. Lateral pinnae several pairs. 3. Terminal pinna unlike the lateral. 4. Fonds 30 cm. or more high. 5. Terminal pinna entire or sinuate (8) G. subrepanda 5. Terminal pinna pinnatifid (9) G. repanda 4. Fronds rarely 10 cm. high (10) G. inconstans 3. Terminal pinna like the lateral. 4. Free included veinlets few or none (11) G. contaminans 4. Free included veinlets regularly present. 5. Primary veins conspicuous (12) G. costata 5. Primary veins obscure (13) G. presliana (1) G. linnaeana (Hooker). Rhizome wide-creeping; stipes 5 cm. more or less high, slightly fibrillose below; sterile frond 10 to 20 cm. high, 1 to 2 cm. broad, narrowed gradually to both ends, sometimes rooting at the apex, entire, papyraceous, subopaque, dark green; main veins fine, rather zigzag but distinct nearly to the margin; areola? copious, without free veinlets; fertile frond hardly 10 cm. long, less than 1 cm. broad. Rizal, Loher. This plant often has a pair of minute free pinnae at the base of the linear frond; or even the sterile frond pinnate. Malaya. (2) G. variabilis (Hooker) Bedd. Rhizome wide-creeping; stipe of sterile frond 0 to 10 cm. high, of fertile 30 cm. or more; sterile frond 30 42 POLYPODIACE^E OF THE PHILIPPINE ISLANDS. cm. more or less high, contracted gradually to the base, oblong-spatulate, acute or obtuse, entire, papyraceo-herbaceous, glabrous ; main veins prom- inent, zigzag, reaching nearly to the margin, areolse copious, with free included veinlets; fertile frond 15 to 30 cm. high, 4 mm. broad. Davao, Warburg 14114. India and Malaya. (3) G. minor (Mett.) Bedd. (Dendroglossa normalis Presl in part.) Rhizome wide-creeping, firm ; stipe of sterile frond 2 to 5 cm. high, glabrous, stramineous; of fertile about 10 cm.; sterile frond 3 to 5 cm. high, 1 cm. broad, obtuse, entire, with tapering base, herbaceous, glabrous; no main veins, areolse and included veinlets copious; fertile frond 3 to 5 cm. high, 3 mm. broad. Samar, Cuming 326 in part. Khasya hills in India. (4) G. lanceolata Hooker. Rhizome woody, wide-creeping; sterile frond sessile or decurrent on a short stipe, 15 to 30 cm. high, 1 to 3 cm. broad, obtuse or acute, entire, narrowed very gradually below, herbaceous, glabrous; main veins raised but falling short of the margin; areolae copious, with free veinlets; fertile frond 15 to 30 cm. high, 2 to 4 mm. broad, on a stipe 20 cm. high. , Samar, Cuming 326 in part, a small form; Davao, Copeland 932. India and Malaya. (5) G. axillaris (Cav.) Presl. Rhizome wide-scandent, branching; stipe of sterile frond short or none, of fertile about 10 cm. high, slightly scaly at the base; sterile frond 15 to 30 cm. long, 2 to 3 cm. broad, obtuse, entire, tapering gradually to the base, papyraceous, glabrous ; no main veins; areolae very copious, with free veinlets; fertile frond 15 to 30 cm. long, 2 to 6 mm. broad, flexuous. Luzon, Nee, Cuming 30; Albay, Baranda. India and Malaya. This and the two preceding species are sometimes regarded as forms of G. variabilis. (6) G. taccaefolia (Hooker) J. Sm. Rhizome short, stout, creeping; stipe of sterile frond about 10 cm. high, of fertile about 30 cm., both clothed below with narrow, horizontal paleae ; sterile frond 30 cm. more or less, long, typically trifid, sometimes simple or pinnate, sometimes rooting at apex, pinnae acute, entire, lanceolate, rachis winged in the more complex forms and the lowest pinnae forked, papyraceous, glabrous; main veins distinct nearly to margin, with regular transverse veinlets and copious areolae with included veinlets; fertile frond typically trifid with middle segment 15 cm. long, the lateral 10 cm., 3 to 4 mm. broad, exceptionally simple or pinnate. This species is regarded as including Anapausia decurrens Presl, Gymnopteris subquinquefida Presl, and G. latifolia Presl. Luzon, Cuming 3 and 5; "Manila," Meyen, Gaudichaud; Rizal, Loher; Mindoro, Cuming 357; Culion, Merrill 534. (7) G. flagellifera (Wall.) Bedd. Rhizome short and terrestrial, or scandent up tree trunks when it is scaly and climbs by means of rootlets; ASPIDIEJE — GYMNOPTEKIS. 43 stipe of sterile frond 5 to 20 cm. high, of fertile 20 to 40 cm., scaly or glabrescent; sterile frond simple, or with 1 to 3 pairs of pinna, the terminal one lanceolate, entire, repand or subserrate, often elongate and rooting, lateral ones more or less reduced, herbaceous, glabrous; main veins distinct, areolse of various forms, with few or no included veinlets; fertile fronds usually trifoliate or pinnate, 3 to 10 cm. long, lanceolate. This species is well distinguished from the preceding by the venation and the longer, more slender rhizome. This species includes Poecilopteris hetero- clita Presl and P. diversifolia Presl. Isabela-Luzon, Warburg 11603; "Manila," Haenke, Cunning 32; Sorsogon, Haenke, Baranda; Davao, Copeland 671, 752, 950. India and Malaya. (8) G. subrepanda (Hooker) J. Sm. Rhizome woody, wide-creeping; stipe 15 to 30 cm. high, stout, erect, nearly naked; sterile frond simple and 30 cm. long by 3 to 5 cm. broad, or pinnate, and 60 cm. long by 30 cm. broad, with several pairs of linear-oblong, entire or subrepand pinnae, subcoriaceous, glabrous; main veins distinct nearly to margin; areolae and included veinlets copious; fertile frond like the sterile, but smaller. Luzon, Cuming 225; Isabela-Luzon, Warburg 11622. Penang. (9) G. repanda (Blume) Christ. Rhizome creeping; stipe 15 to 30 cm. high, that of the sterile frond usually the longer, naked; sterile frond 30 to 60 cm. long, 20 to 30 cm. broad, sometimes elongate and rooting, with numerous pinna? on each side, the lower ones 10 to 15 cm. long, 2 em. broad, cut one-fourth of the way to the costa into entire, obtuse lobes, herbaceous, glabrous; main veins distinct, areolae copious, without free veinlets; fertile pinnae much smaller, stalked, entire or repand. Achrosti- chum Quoyanum Gaud, is a form with the lobes deeper and toothed. This species is construed as including also Poecilopteris sinuosa Presl, Hete- roneuron argutum Fee, and Heteroneurum cuspidatum Presl. Luzon, Cuming 104, 105, 161; Sorsogon, Haenke; Leyte, Cuming 294. Java to China and Polynesia. (10) G. inconstans Copeland. Rhizome creeping, scaly; stipe of sterile frond 1 to 3 cm. high, of fertile 3 to 10 cm., filiform, erect, green, glabrous or scaly below; sterile frond 4 to 8 cm. or more long, usually pinnate, linear to ovate in form, membranaceous, glabrous, the terminal pinna usually elongate, linear, proliferous; lateral pinnae 2 to 6 pairs, lanceolate to orbicular in form, usually entire, sessile, somewhat decurrent; veins inconspicuous, forming few areolae, without included veinlets; fertile frond linear, with 2 to 4 pairs of round or oblong remote pinnae 1 to 4 mm. long, the lowest sometimes stalked, with few or no veins beside the costa. Lamao Forest Reserve, Luzon, Copeland 251, Merrill 3128. Completely covering bowlders in beds of streams. (11) G. contaminans (Wall.) Bedd. Rhizome short-creeping, thick; stipe 30 to 40 cm. high, glabrescent; sterile frond 30 to 60 cm. high, ovate; pinnae 10 or more on each side, alternate, sessile or short-stalked, lanceolate, acute, entire, crenate or pinnatifid; terminal pinna commonly 44 POLYPODIACEJ3 OF THE PHILIPPINE ISLANDS. elongate and proliferous; main veins evident about half way to margin, areolse large, with few included veinlets; fertile pinna; much contracted, entire or sinuate. This partly includes Achrostichum blumeanum Hooker. Luzon, Cuming 223, 225; Rizal, Loher; Lamao, Copeland 249. India, Burmah. (12) G. costata (Wall.) Bedd. Rhizome creeping, bearing subulate scales; stipe 45 cm. or less high; frond 60 cm. or more long; pinna? reaching a length of 35 cm. and a breadth of 8 cm., stalked, acuminate, entire, sinuate or crenate, subcoriaceous, glabrous; main veins very prom- inent, close; areolae and included veinlets copious; pinnae of fertile frond smaller and more coriaceous. "Manila," Gaudichaud. Upper India, Burmah. (13) G. presliana (F6e). Rhizome woody, short-creeping; stipe 10 to 20 cm. high, firm, erect, naked; sterile frond about 30 cm. long, half as broad, with numerous erecto-patent pinnae 5 to 8 cm. long, 1 cm. broad, entire, narrowed to both ends, submembranaceous, glabrous, lower ones short-stalked; rachis winged above; venation as in Goniophlebium, veinlets uniting in pairs, with one free veinlet in each areola; fertile fronds usually with longer stipes and pinnae much contracted. Sorsogon, Haenke. India. (10) DIPTERIS Reinwardt. Rhizome creeping, stipes not articulate to it; frond cleft to the base into parts, which are dichotomously divided or lobed; main veins dichoto- mous; veinlets anastomosing, with free included veinlets; sori small, round, mostly along the main veins and cross veins, without indusia. Striking terrestrial ferns of large size, fan-shaped or reniform in general outline. (1) D. conjugate (Kaulf.) Reinw. Rhizome covered with dark brown, linear scales ; stipe usually 1 m. or more high, firm, brown, naked, polished ; frond usually more than 30 cm. high and much broader, the halves lobed at least two-thirds of the way down, their divisions successively more shallowly, segments acute, coarsely or obscurely serrate, subcoriaceous, glabrous, dark green above, glaucous and bluish beneath; main veins very conspicuous, areolae copious. Luzon, Cuming 155, Steere; Benguet, Mariveles, and Laguna, Loher; Baguio, Topping 164, 238, Elmer 5782; Mount Mariveles, Merrill 3228, Whitford 250; Davao, Warburg 14185. Malaya to Formosa and Polynesia. III. DAV ALLIED. Sori (except in Oleandra) terminal on their veins, on or near the margin of the frond; indusium opening toward the margin (wanting in Mona- chosorum ) ; margin of frond often modified in connection with sorus ; stipes articulate to rhizome, or not; fronds usually at least deeply pin- natifid; pinnules of segments usually more developed on the acropetal side. 1. Pinnae not dimidiate, i. e., the lamina is more or less developed on both sides of the costa. 2. Sori separate and distinct. 3. Indusium fastened at the base only. •4. Pinnae articulate to the rachis. 5. Stipe articulate to rhizome (11) Arthropteris 5. Stipe not articulate to rhizome.. (12) Nephrolepis 4. Pinnae not articulate to the rachis, or frond simple. 5. Stipe articulate to rhizome. 6. Sori dorsal on veins, near costa (13) Oleandra 6. Sori marginal or sub- marginal (14) Humata 5. Stipe not articulate to rhizome.. (15) Saccoloma 3. Indusium fastened at base and sides. 4. Stipe articulate to rhizome 1(16) Davallia [Microlepia ciliata 4. Stipe not articulate to rhizome. 5. Margin of frond hardly modified. 6. Ultimate divisions of frond not cuneate nor sori marginal (17) Microlepia 6. Ultimate divisions cune- ate, with sori on the broad apex (18) Odontosoria 5. Margin united with indusium to form a cup-shaped receptacle.. (19) Dennstaedtia 3. Indusium wanting (20) Monachosorum 2. Sorus continuous around the pinna (21) Schizoloma 1. Pinnae dimidiate, lower half obsolete (22) Lindsaya (11) ARTHROPTERIS J. Smith, Diels. Rhizome scandent, stipes articulate to it or a little above it; frond pinnate, the pinnae articulate to the rachis; sori orbicular, indusium round- reniform, fixed by the sinus, or (not in Philippine species) wanting. A small genus very near Nephrolepis. 45 46 POLYPODIACEJE OF THE PHILIPPINE ISLANDS. (1) A. glabra Copeland. Rhizome wiry, climbing 3 m. high on tree trunks, sparsely clothed with black appressed scales or their bases; stipes about 5 mm. high, articulate well above the rhizome; frond 20 to 30 cm. high, 5 to 7 cm. broad, pinnate, with a terminal pinna rather larger than the others; lateral pinnae about 8 mm. broad, obtuse, or the upper ones subacute, obscurely crenate, slightly auricled, the upper side abruptly truncate, the lower very oblique at the base, papyraceous, gla- brous, remaining green when dried; sori orbicular, in a row a little nearer the margin than the costa; indusium fixed by a very narrow sinus, persistent. E-wi-ig River, Paragua, Merrill 740. (2) A. ramosa (Beauv. ) J. Sm. Stipes very short, scattered, on a slender, wiry, wide-creeping rhizome; frond 15 to 30 cm. long, 3 to 7 cm. broad; pinnae 1 to 3 cm. long, 1 cm. broad, slightly crenate, the upper edge auricled and truncate, parallel with the stem, the, lower oblique; texture papyraceous; rachis and both sides slightly villose, the whole plant turning blackish when dried; indusium roundish, very fugacious. Luzon, Cuming 101; Basilan, Steere. Africa to Samoa. (12) NEPHROLEPIS Schott. Fronds pinnate; pinnae articulate to the rachis but rachis not articulate to the rhizome; sori on the back of the pinnae, near the margin or remote from it, in a row parallel to it, reniform, varying from broadly so to orbicular^ The most of our species are terrestrial with erect caudices above the ground, supported by braces which also function as roots and runners. 1. Indusium with broad sinus, opening toward apex of pinna (1) IV. cordifolia 1. Indusium with deep sinus, opening obliquely toward margin. 2. Rhizome short. 3. Frond nearly glabrous (2) N. exaltata 3. Frond hirsute (3) N. Mrsutula 2. Rhizome scandent (4) N. volubilis 1. Indusium orbicular-reniform, attached at top of sinus or sub- peltate. 2. Rachis nearly glabrous, sori far from margin (5) N. acuta 2. Rachis tomentose, sori near margin. 3. Pinnae hirsute (6) N. rufescens 3. Pinnae glabrous (7) N. barbata (1) N. cordifolia Presl. Caudex suberect or oblique, the wiry fibers from it often bearing tubers; stipes tufted, wiry, 5 to 15 cm. high, naked or scaly; fronds 15 to 40 cm. long, 2.5 to 3.5 cm. broad; pinnae close, often imbricate, obtuse, entire or nearly so, the base cordate or rounded on the lower side, with a short, sharp auricle on the upper, subcoriaceous, nearly glabrous; sori large, in a row midway between midrib and margin; indusium broad, firm, opening toward the apex of the pinnae or somewhat obliquely. DAYALLIE^E — NEPHROLEPIS. 47 Benguet, Loher (altitude, 2,500 m.), Elmer 6507 (form with very chaffy stipe and rachis), 6528 (very lax, serrate form, in moist ravines), Topping 231; Nueva Ecija, Merrill 240; Arayat, 800 m., Loher; Mariveles 1,300 m., Merrill 3236. Pantropic. (2) N. exaltata Schott. Stipes tufted, 10 to 15 cm. high, naked or slightly scaly; fronds 30 cm. or more long, about 10 cm. broad; pinnae close but not imbricate, the fertile linear, acute, usually subfalcate, sterile shorter and less acute, base rounded on the lower side, auricled on the upper, entire or nearly so, subcoriaceous, nearly glabrous; sori submarginal ; indusium reniform with a deep sinus. Sorsogon, Baranda; Rizal, Loher, Marave. A form with repeatedly dichotomous pinnules is common in cultivation in Manila. Pantropic. (3) N. hirsutula Presl. Like N. exaltata, except that both surfaces of the pinnae, and especially the rachis, are downy. Bataan Island, Baranda; Benguet and Manila, Loher; cultivated in Manila. (4) N. volubilis J. Sm. Rhizome scandent indefinitely, naked, pale brown, wiry, bearing small clusters of fronds at the ends of very short branches; stipes about 10 cm. long, firm, naked or nearly so; fronds 25 to 50 cm. long, 4 to 6 cm. broad, the rachis firm, sparsely chaffy on the back; pinnae about 5 mm. broad, very obtuse, nearly entire, rounded on the lower side at the base, obscurely auricled on the upper, coriaceous, glabrous, or the costa minutely squamulose above; sori near the margin; indusium reniform with a deep sinus. Luzon, Cuming 37; Negros, Cuming 346; Davao, Copeland 429, common sterile in low thickets. Himalayas to New Guinea. (5) N. acuta Presl. Rhizome very short, erect, with scaly props; stipes tufted, stout, 30 to 80 cm. high, squamulose at the base, glabrescent above; fronds 80 to 120 cm. high, 30 to 40 cm. broad; pinnae 15 to 25 mm. broad, separated by less than their own breadth, acute, cuneate or more abruptly contracted at the base, sterile entire, fertile obscurely crenate, herbaceous or subcoriaceous, glabrous or nearly so; sori almost as near the costa as the margin; indusium becoming orbicular by the meeting of the two broad basal lobes. (Includes N. macrophylla Presl.) Luzon, Cuming 22, Steere; Benguet, Loher (altitude, 2,250 m.), Elmer 6145; Manila, Warburg, Marave; Tayabas, Warburg; Sorsogon, Baranda; Paragua, Merrill 725; Basilan, DeVore and Hoover 86; Davao, Warburg 12757, Copeland 365, 629. Pantropic. (6) N. rufescens Presl. Caudex erect, stout, with numerous braces, coated with small black, appressed scales; stipes 20 to 60 cm. high, firm, brown, glabrescent; frond 60 to 100 cm. high; pinna? 10 to 15 mm. broad, acute, sterile entire, fertile more or less serrate, broadly rounded at the base on the lower side, the upper usually prominently auricled, herbaceous, 48 POLYPODIACEJG OF THE PHILIPPINE ISLANDS. under surface, and still more the rachis, ferruginous-pubescent; sori near the margin ; indusium becoming orbicular. Cagayan-Luzon, Warburg 12221; Benguet, Elmer 6235, 6469; Topping 211; Sorsogon, Baranda; Manila, Santos, Ramos; Tayabas, Merrill 2438; Mindoro, Merrill 884; Davao, Copeland 389, 485, 589, the most char- acteristic plant of the edges of drier thickets. (7) N. barbata Copeland. Rhizome short, suberect, with many fine supporting roots; stipes 10 to 15 cm. high, firm, sparsely scaly at the base, glabrescent above; frond rather more than 50 cm. long, 8 cm. broad; pinnae, the larger sterile ones 35 mm. long, 10 mm. broad, acute, entire, the fertile 50 mm. long, 7 mm. broad, acuminate, more or less serrate toward the apex, rounded on the lower side at the base, acutely auriculate on the upper, subarcuate, subcoriaceous, glabrous, reduced toward the base of the frond ; sori near the margin ; indusium orbicular, the lobes overlapping. Todaya, Davao, epiphytic on tree trunks, Copeland 1286. (13) OLEANDRA Cavanilles. Rhizome creeping or erect, branching, scaly; stipes articulate to projec- tions from the rhizome; fronds simple and entire, lanceolate; veins free, running to the margin of the frond, sori on the backs of the veins, near the costa; indusium reniform, fixed by the sinus, firm. This genus was formerly classed with the Aspidiece, and has lately been separated as constituting an isolated group. It seems to me, however, that the resem- blances to various Davalliece, and specially to the simple species of Humata — the creeping, scaly rhizome, the articulate stipe, the free, forked, closely parallel veins, the shape, attachment, and texture of the indusium, and its opening obliquely toward the apex of the frond — all these can not well be construed otherwise than as evidences of real affinity; and that, while the position of the sori may well serve as a generic character, it ought not to make us adopt a larger classification that fails to express so many characters in common. 1. Rhizome woody, suberect. 2. Stipe articulate just below lamina (1) O. colubrina 2. Stipe articulate "below its middle" (2) O. neriiformis 1. Rhizome creeping. 2. Paleae squarrose (3) O. Whitmeei 2. Paleae appressed (4) O. Cumingii (1) O. colubrina (Blanco) Copeland. Rhizome woody, stout, suberect, branching, clothed with scales whose very narrow spreading tips are decid- uous, leaving the persistent, imbricate, peltate bases, black with brown margins; stipe articulate immediately below the lamina; fronds mostly clustered, 15 to 20 cm. long, about 2 cm. broad, widening toward the upper end, then abruptly contracted and caudate, narrowed gradually toward the base, entire, the margin sometimes slightly cartilaginous under the lens, ciliate with whitish hairs, with which the surfaces are sparsely and the costa densely clothed, papyraceous; sori in an irregular row on each side of costa; indusia small, brown with white margins, firm, almost without a sinus. Mount Mariveles, Merrill 3238, Copeland 1381, Whitford 248. DAVALLIE^E — OLEANDRA. 49 (2) O. neriiformis Cav. Rhizome woody, mostly erect, branching, clothed with appressed scales; stipe articulate below the middle — that is, longer than the outgrowth of the rhizome that bears it — fronds scattered or clustered, 20 to 40 cm. high, 2 cm. broad, narrowed gradually toward both ends, usually subcoriaceous and glabrous; indusium oblique, large enough to cover sorus. This species is construed as including PresFs 0. mollis, with pubescent fronds, and 0. macrocarpa, with large sori and ciliate margin. Luzon, Xee, Cuining 94, 60 in part; Baguio, Elmer 6286; Davao, War- burg 14186. Pantropic. (3) O. Whitmeei Baker. Rhizome wide-creeping, 2 mm. thick, densely beset with squarrose palese 4 mm. long; stipes (including both parts) about 4 cm. high, articulate about the middle; fronds 20 to 30 cm. high, one-tenth as broad, acuminate, narrowed to the base, slightly repand, membranous, glabrous except for fine short hairs along the margin, and narrow scales 2 mm. long standing horizontally from the costa, the latter sometimes deciduous; sori large, almost orbicular, indusium membranous. Mount Apo, DeVore and Hoover 364; Copelcmd 1055. Samoa, Celebes. (4) O. Cumingii J. Sm. Rhizome creeping, 2 mm. thick, densely clothed with appressed lanceolate-subulate scales; stipe (including both parts) about 5 cm. high, articulate below the middle; frond 20 to 30 cm. high, one-tenth as broad, lanceolate, acuminate, contracted rather abruptly at the base, subentire, with narrowly cartilaginous margin? papyraceous, costa and both surfaces slightly pubescent; indusium rough. Luzon, Cuming 60 in part; Baguio, Elmer 6513. India, southern China. (14) HUMATA'Cavanilles. Rhizome creeping, scaly, the stipes articulate to it; sori terminal, at the margin or somewhat remote from it; indusium reniform or more elongate, fixed by its broad base. Mostly small epiphytic ferns, resembling Davallia, from which they are distinguished by the free sides of the (usually broader) indusium. "L.Euhumata; indusium thin. 2. Sterile frond entire. 3. Fertile frond entire (1) H. angustata 3. Fertile frond lobed <2) H. heterophylla 2. Sterile frond pinnatifld or pinnate. 3. Lowest segments not greatly enlarged (3) H. gaimar.diana 3. Lowest segments or pinnae very large. ^ 4. Not more than bipinnatifid (4) H. repens 4. At least tripinnatifld. 5. Sori on the teeth of the seg- f (5) H. vestita mentS - 1(6) H. Cumingii 5. Sori almost covering segments (7) H. botrychioides 24036 4 50 POLYPODIACEJE OF THE PHILIPPINE ISLANDS. 1. Leucostegia ; indusium thin. 2. Frond about 2 dm. high, triangular (8) H. falcinella 2. Frond more than 3 dm. high. 3. Sori 1 to 2 mm. wide (9) H. immersa 3. Sori minute (10) H. hymenophylloides (1) H. angustata Wallich. Rhizome wide-creeping, scaly, stout; fronds scattered, short-stalked, about 10 cm. long and 1 cm. broad, apex acute, margin slightly and irregularly crenate, very coriaceous, glabrous or with a few scales on the costa beneath; sori in a row along the edge. E-wi-ig River, Paragua, Merrill 778, on rocks in forest. Malaya. (2) H. heterophylla (Desv.) J. Sm. Rhizome wide-creeping, scaly; frond shortly stalked, 6 to 10 cm. long, one-fourth as broad, glabrous, coriaceous; the sterile one ovate-lanceolate, entire or slightly lobed at the base, the fertile one narrower, deeply sinuato-pinnatifid ; sori 2 to 10 to a lobe. Maquiling, Loher; Samar, Cuming 338; E-wi-ig River, Paragua, Merrill 763, epiphytic. Malaya and Polynesia. (3) H. gaimardiana (Gaud.) J. Smith. Rhizome wide-creeping, scaly; stipe about 1 cm. high, scaly or glabrescent; frond 10 to 15 cm. high, 3 to 5 cm. broad, ovate-lanceolate, cut down nearly or quite to the rachis into parallel, entire or crenate, linear-oblong lobes, the lowest pair of which are often deeply incised on their lower side, glabrous, coriaceous; sori oblique, in full rows between midrib and margin. Luzon, Cuming 61 ; Gimogon River, Negros, Copeland 54, in tree tops in the forest. Malaya and Polynesia. Our plant is intermediate between Davattia parallela Wallich and D. pectinata Smith. (4) H. repens (L.) J. Sm. (Davallia pedata Smith). Rhizome wide- creeping, scaly; stipe 5 to 10 cm. high, rather scaly; frond 5 to 10 cm. long, 3 to 5 cm. broad at the base, deltoid in general outline, cut down nearly to the rachis; upper segments linear-oblong, acute, erecto-patent, inciso-dentate, the lower pair broader, deeply inciso-pinnatifid, especially on the lower side; texture coriaceous; sori placed in rows on the teeth on both sides of the lobes. Arayat, Loher, Merrill 3818, differs from the type in that the sterile frond is smaller and broadly lobed, and the fertile larger and more deeply incised, and the rachis very scaly; Cagayan-Luzon, Warburg 12219; Mount Mariveles, Merrill 3210, Forestry Bureau (Barnes) 347, Copeland. India to Japan and Australia. (5) H. vestita J. Sm. Rhizome wide-creeping, densely scaly; stipe about 10 cm. high, rather scaly below; frond 10 to 20 cm. long, 10 cm. broad, deltoid in outline ; all except the upper pinnae cut down to a narrowly winged rachis; barren frond with the segments of all except the lower pinnae blunt, scarcely toothed; lobes of the fertile pinnae narrower, sharper toothed; of the lower ones deeply so; texture coriaceous; sori placed on the teeth of the segments. DAVALLIEJE — HUMATA. 51 Mount Data, 2,250 m., Loher; Baguio, Topping 199 (?). Java, Ceylon. (Probably a mere variety of H. repens.) (6) H. Cumingii (Hook.). Rhizome creeping, scaly; stipe 10 cm. high, both it and the rachis rather scaly; sterile frond about 3 cm. each way, deltoid-cordate, cut down nearly to the rachis; upper pinnae blunt, slightly toothed, the lower pair deeply pinnatifid below; texture coriaceous; fertile frond 10 to 12 cm. long, 8 cm. broad, the same shape, but much more divided; lowest pinnules deeply pinnatifid with sharply toothed lobes; sori placed in the teeth of the segments. Samar, Cuming 138. (7) H. botrychioides J. Sni. Rhizome wide-creeping, scaly; stipe 5 to 10 cm. high, scaly below; frond 6 to 20 cm. long, 5 to 10 cm. broad, deltoid in general outline, decidedly dimorphous, the barren ones with a narrowly-winged rachis; lower pinnae cut down nearly to the rachis, with deep bluntly-toothed segments; fertile pinnae much more finely divided; pinnules of the lower pinnae cut down to a narrow rachis with narrow sharply-toothed segments almost covered with sori. Tonglon, 2,000 m., Loher; Baguio, Elmer 5843. Aneiteum and Fiji. This and the preceding three species are decidedly too near together. A fern differing from H. botrychioides in being less divided grows on Mount Apo, Mindanao (Copeland 1030). (8) H. falcinella (Presl). Rhizome wide-creeping, thickly beset with stiff, spreading hairs, ferruginous, turning toward black; stipe 5 to 10 cm. high, glabrous, as is the frond; fronds about 13 cm. high, 10 cm. broad, deltoid, tri- or quadripinnatifid; main rachis slightly winged; lowest pinnae inequilateral; pinnules oblong, cut down nearly to the rachis into segments which are again deeply toothed, ultimate segments of the fertile frond falcate-mucronate, of the sterile frond broader and not so sharp; texture subcoriaceous ; sori 2 to 6 to a lobe, placed at the bases of the teeth; indusium thin. Leyte, Cuming 304; Gimogon River, Negros, Copeland 72; epiphytic in forest. This fern has the aspect of Eudavallia and the paleae of Microlepia. (9) H. immersa (Wall.) Diels. Rhizome hypogaeous, wide creeping, stout, fibrillose; stipe 10 to 20 cm. high, erect; frond 30 to 45 cm. long, 15 to 25 cm. broad, deltoid, tripinnate; lowest pinnules lanceolate-deltoid, 5 to 8 cm. long, with broad segments, which are obliquely truncate at the base below, and roundly lobed, with the lobes again crenate above; texture herbaceous; sori large (2 mm. broad), 1 to 6 to a segment, oblique. Tonglon, 2,250 m., Loher, a large form; Baguio, Topping 246, 256, 304; Elmer 5908. Mount Apo, Mindanao, DeVore and Hoover 322 ( ?). India and Java. (10) H. hymenophylloides (Bl.) (Davallia affinis Hook.). Rhizome thick, densely clothed with sharp-pointed ferrugineous scales; stipe 10 to 25 cm. high, erect, strong; frond 30 to 60 cm. long, 15 to 30 cm. broad, deltoid-lanceolate, tri- or quadripinnate; lower pinnules with oblong 52 POLYPODIACEJ3 OF THE PHILIPPINE ISLANDS. rhomboidal lobes, the segments of which are deeply and finely inciso- pinnatifid with sharp teeth ; texture herbaceous ; sori 2 to 6 to a segment, small, placed at the base of the teeth. Baguio, Loher, a large form, with narrow lobes; Topping 307 ?. Cuming's 117 and 215 (Microlepia tenuifolia Presl), from Luzon, are probably both this species. (15) SACCOLOMA Kaulfuss. Rhizome creeping, scaly, stipe not articulate to it; frond (in our species) finely dissected; sori near, not on, the margin, small, numerous; indusium short, attached by the broad base, thin. Our species is a large terrestrial fern. S. mcluccanum (Bl.) Mett. Rhizome creeping, clothed with large pale-brown scales; stipe erect, about 3 dm. high, sparsely scaly; frond 6 to 10 dm. high by half as broad, quadripinnatifid, deltoid; pinna lance- olate; the segments of the pinnules cut down to the rachis into broadly toothed, oblong lobes; texture membranous or subcoriaceous, both sur- faces naked or nearly so; sori small, in the teeth, near the base. Benguet, Loher 49, Elmer 6289. Malaya and Polynesia. (16) DAVALLIA Smith. Rhizome short or creeping, scaly, the stipes articulate to it; sori at or very near the margin; indusium usually elongate, attached at the base and sides, the margin of the frond often so modified as to resemble it. Mostly epiphytic ferns. The two sections would better be treated as separate genera. 1. Prosaptia; fronds elongate, pinnatifld or simply pinnate. 2. Frond narrowly linear (1) D. exaltata 2. Frond not narrowly linear. 3. Segments lobed (2) D. contigua 3. Segments nearly entire (3) D. alata 1. Eudavallia; fronds deltoid, at least tripinnatifld (except D. wagneriana). 2. False veins present between the true ones. 3. Sori flanked by prominent teeth (4) D. epiphylla 3. No prominent teeth (5) D. elegans 2. No false veins. 3. Sori marginal. 4. Palese of rhizome brown (6) D. solida 4. Paleae whitish (7) D. bullata 3. Sori not reaching the margin. 4. Distinctly deltoid .... ... I (8) D~ decurrens [ (9) D. divancata 4. Lowest pinnae not enlarged (10) D. wagneriana (1) D. exaltata Copeland. Rhizome short, densely invested with linear brown chaff; fronds sessile, crowded, pendent, half a meter long and less than a centimeter wide, the lower third sterile, pinnatifid almost to the rachis, the lower segments reduced; segments inequally triangular, coria- ceous, obtuse, plane, glabrous; veins invisible; sori solitary in the apices of the segments. DA VALLIE.E DA VALLIA. 53 Mount Apo, Mindanao, Copeland 1006, on tree trunks, in the mossy forest, at an altitude of 1,800 m. (2) D. contigua Swartz. Fronds tufted, sessile or nearly so, 30 to 45 cm. long, about 3 cm. broad, linear-lanceolate, cut down nearly or quite to the rachis into numerous linear-acuminate or bluntish, slightly- toothed lobes; texture coriaceous; sori 1 to 8 to a lobe, placed in the teeth on their upper part. Luzon, Cuming 216; Benguet, Elmer 6275; Davao, Copeland 1013, DeVore and Hoover 335. Ceylon to Polynesia. (3) D. alata Bl. (D. Emersoni Hk. and Gr.) Rootstalk erect, short, scaly; fronds tufted, sessile, 20 to 30 cm. high, 3 cm. wide at the widest part, linear-lanceolate, cut more than half way down to the rachis into numerous linear-oblong, or at the lower part triangular, lobes; texture coriaceous, minor veins invisible; sori 1 to 8, placed round the edge of the lobes. Mount Mariveles, Topping. India to Borneo. (4) D. epiphylla Bl. Rhizome thick, fibrillose; stipe 10 to 50 cm. long, erect, firm; frond variable in size, deltoid-lanceolate, tri-quinque- pinnatifid; main rachis hardly at all winged; pinnules of the lowest pinnae lanceolate, segments narrow, mucronate, sharply toothed ; texture coriaceous; veins not immersed, one or two carried into each tooth; sori small, submarginal, half-cupshaped, with the sharp mucro of the tooth extending beyond them. Davao, Warburg 14138, Copeland. Java and Malay Peninsula. Not sufficiently distinct from D. elegans. (5) D. elegans Swartz. Rhizome stout, creeping, densely clothed with wooly fibrous scales; stipe stout, 10 to 50 cm. high, brown; frond 30 to 60 cm. high, two-thirds as wide, deltoid tri- to quinquepinnatifid ; main rachis slightly winged toward the apex; ultimate segments oblong-deltoid or narrower, themselves usually toothed, inaequilateral ; texture coriaceous ; venation prominent, irregular, with false veins free at both ends between the true ones; sori several to a segment, marginal but exceeded by the teeth; indusium half-cupshaped. Luzon, Cuming 77; Benguet, Elmer 6385; Gimogon River, Negros, Copeland 69; Capiz, Panay, Copeland. Madagascar across Polynesia. Very variable in size and the degree of dissection of the frond. Epiphytic and terrestrial. D. elata Sw. is a larger and less coriaceous form of this species, with finer divisions. (6) D. solida Swartz. Rhizome stout, densely clothed with adpressed scales or fibers; stipe 10 to 15 cm. high, strong, erect; frond 30 to 60 cm. long, deltoid, tripinnatifid; apex with a moderately broad undivided center; segments ovate-rhomboidal, deeply toothed, narrower and sharper 54 POLYPODIACJLE OF THE PHILIPPINE ISLANDS. in fertile frond; veins uniform; texture coriaceous; sori nearly or quite marginal ; involucre semicylindrical. Cagayan-Luzon, Warburg 12203; Mount Mariveles, Merrill 3715. Malaya and Polynesia. D. so I Ida var. caudata Cav. (as species) ; pinnules more divided with narrower segments. Baguio, Topping 272, Elmer 6005. (7) D. bullata Wallich. Rhizome creeping, stout, densely clothed with light-brown or whitish fibrillose scales; stipe about 10 cm. high, erect, strong; frond 15 to 20 cm. long, almost as broad, deltoid, tri-quadripin- natifid; pinnules of the lower pinnae lanceolate, 5 to 8 cm. long, with deeply inciso-pinnatifid oblong-rhomboidal segments; texture coriaceous; sori deeply half-goblet shaped, occupying the greater part of the tooth in which they are placed, marginal, with usually a horn on the outside. Benguet, Loher, Elmer 6490 — epiphytic on Pinus, fronds purplish. India to Korea and Celebes. (8) D. decurrens Hooker. Rhizome stout, creeping, densely fibrillose; stipe 10 to 15 cm. high, stout, erect; frond 30 to 60 cm. long, deltoid, tripinnatifid; main rachis hardly at all winged at the apex; pinnules of the lower pinnae lanceolate-acuminate, 10 cm. long, 2 to 3 cm. broad, cut down throughout within a short distance of the rachis, with broadly- toothed linear-oblong segments; texture subcoriaceous ; veins uniform; sori falling short of the margin; involucre half-cupshaped. Philippines. Resembles D. divaricata in the shape and position of the sori, but the frond less divided. (9) D. divaricata Bl. Rhizome creeping, stout, clothed with linear ferruginous scales; stipe 15 to 30 cm. high, firm, erect; frond 60 to 90 cm. long, tripinnatifid; lower pinnae often 30 cm. long by 15 cm. broad; segments deltoid, cut down to the rachis in the lower part, with linear- oblong, sharply toothed lobes; texture coriaceous; veins uniform, not conspicuous; sori half-cupshaped, placed obliquely as regards the central veins in the teeth at some distance from the edge. Montalban, Loher; Davao, Warburg 14137. India to Hongkong and Java. Best distinguished from D. solida and D. elegans by the position of the sori. (10) D. wagneriana Copeland. Rhizome stout, scandent, densely clothed with lanceolate, acuminate, appressed brown scales; stipe stout, scaly near the base, glabrous above, as is the thick, slightly winged rachis; frond 20 to 25 cm. high, 10 to 15 cm. broad, glabrous, coriaceous, tripinnatifid at the base only, the fertile narrower than the sterile; the lowest pinnae not larger than the succeeding, with a few distinct, deeply toothed equal pinnules at the base of each, followed by broadly linear, acutely toothed segments; sori usually a little deeper than broad, only rarely reaching the margin. Todaya, Davao, 1,100 m., Copeland 1300; epiphytic in the crown of high trees. DAVALLIE^E — MICROLEPIA. 55 .(17) MICROLEPIA Presl. Rhizome creeping, hairy, stipes not articulate to it (exc. M. ciliata) ; sori near the margin; indusium usually as broad as long, fastened at the base and sides. Terrestrial and epiphytic ferns of various aspect. As construed here, the genus includes Wibelia Bernh. (M. pinnata and its varieties). 1. Davallodes; fronds seriate, stipes jointed to rhizome (1) M. ciliata 1. Wibelia; fronds clustered, tracheides present in specialized receptacles of sorus (2) M. pinnata 1. Eumicrolepia ; no tracheides in receptacle, fronds seriate, not jointed to rhizome. 2. Indusium as long as broad, or longer. 3. Pinnules bluntly toothed (3) M. strigosa 3. Pinnules of lower pinnae incised nearly to rachis (4) M. rhomboidea 2. Indusium broader than long. 3. Frond glabrous. 4. Small, pinnules crenately lobed (5) M. philippinetisis 4. Large, pinnules cut nearly to rachis (6) M. platyphylla 3. Frond not glabrous (7) M. Speluncce \l) M. ciliata (Hk.). Rhizome creeping, covered with soft, brown hairs; stipe 10 cm. high, firm, erect, pubescent; frond 30 to 45 cm. long, half as broad, ovate-lanceolate, tripinnatifid; pinnae spreading, lanceolate, the central ones the largest, 10 cm. or more long, 2 to 4 cm. broad, cut down to a broadly winged rachis, with oblong pinnules cut about half way down with falcate, mucronate teeth; texture thinly herbaceous, flaccid; rachises and under surface softly hairy; sori 2 to 12 to a pinnule, very small, placed near the center of the teeth near the base. Luzon, Cuming 174; Arayat 800 m., Loher. Todaya, Davao, 1,100 m., Copeland 1273. (2) M. pinnata Cav. Rhizome creeping, fibrillose; stipe nigrescent and squamulose toward the base, strong, erect, 15 to 25 cm. long; frond 20 to 40 cm. long, 10 to 20 cm. wide, with distant linear slightly toothed pinnae 10 to 15 cm. long, 6 to 8 cm. broad; texture coriaceous; sori one to each tooth, small submarginal. "Philippines," Nee, Meyen; Luzon, Cuming 139; Mount Mariveles, Loher, Warburg 14183. Malaya and Polynesia. Warburg's Davao plant is described as epiphytic. The Mariveles speci- mens are terrestrial, with rhizomes so short the fronds are clustered. M. pinnata Cav. var. gracilis (Bl.) (Davallia Luzonica Hk.) Lower pinnae tripinnatifid, deltoid: sometimes bipinnate throughout. Interme- diate forms occur. Davao, Loher, Warburg 14137; Mount Mariveles, Merrill, 3213; Copeland. (3) M. strigosa (Sw.) Presl. Rhizome stout, creeping, pubescent; stipe erect, strong, 15 to 30 cm. high, both it and the rachis pubescent throughout; frond 30 to 100 cm. long, 15 to 30 cm. broad, lanceolate, bipinnatifid; lower pinnae 10 to 20 cm. long, 2 cm. broad, linear-lanceolate, much acuminate, cut down to the rachis with unequal-sided, broadly and 56 POLYPODIACE^S OF THE PHILIPPINE ISLANDS. rather bluntly toothed, oblong, rhomboidal pinnules ; texture subcoriaceous ; veins beneath prominently raised and, like the rachises, more or less hairy; sori 2 to 12 to a pinnule, small, placed at the base of the sinuses. Luzon, Cuming 95; Tonglon, 2,250 m., Loher 46. India to Hawaii and Fiji. (4) M. rhomboidea (Wall.) Presl. Different from M. strigosa, of which it is placed as a variety in Synopsis Filicum, in being larger through- out, the lower pinnules lanceolate-deltoid, 4 cm. long, cut down nearly to the rachis into oblong lobes. Baguio, Loher. India. (5) M. philippinensis Harrington, Journ. Linn. Soc. 16:27 (1878). Caudex clothed thickly with narrow rufous scales; stipe about 15 cm. high, dark brown, with a few scales below like those of the caudex, glabrous above ; frond deltoid, 8 to 20 cm. long, with about the same width ; rachis glabrous; lower pinnae deltoid and again pinnate, the upper becoming simple, at the apex confluent; pinnules linear, crenately lobed, with the divisions extending halfway to the midrib; the first pinnules on the lower side much larger than the others; texture coriaceous; surface glabrous; venules immersed, ascending; involucre decidedly intramarginal, broader than deep. (Near D. amboynensis Baker.) Mount Majayjay, Luzon, Steere. . (6) M. platyphylla (Don.) J. Sin. Rhizome creeping, stout, scaly; stipe 60 to 100 cm. high, firm, erect; frond 1 m. long, tripinnatifid ; lower pinnae 30 to 40 long, 15 to 25 cm. broad, with distant linear lanceolate pinnules, which are cut nearly to the rachis below into broad, bluntish, toothed, oblong-deltoid lobes; texture subcoriaceous, both surfaces naked; sori 2 to 12 to a segment, placed one in each tooth a short distance from the edge, about 2 mm. across. Baguio, Loher 43. Ceylon to the Himalayas. (7) M. Speluncae (L.) Moore. Rhizome horizontal; stipe strong, 3 to 10 dm. high, stramineous, minutely squamulose; frond 1 to 2 m. high, half as broad, deltoid, usually quadripinnatifid ; lower pinnae ovate-lanceolate; pinnules lanceolate, cut down to a winged rachis into toothed or pinnatifid lobes, the lowest lobe on the upper side the largest; texture herbaceous; rachis and pinnules hairy, and indusia ornately so; veins conspicuous; sori at the base of the teeth. Benguet, Loher, Elmer 6431; Province of Isabela, Warburg 11625; Mon- talban, Warburg 12753; Tanay, Rizal, Ramos; Sampaloc, Tayabas, Warburg 12763; Malita, Davao, Copeland 665; Culion, Merrill 485. Around the Tropics. (18) ODONTOSORIA Presl. Rhizome short; stipes therefore clustered, not articulate to the rhizome; fronds at least bipinnate; ultimate divisions (in our species) cuneate; sori terminal, ,at or very near the truncate apex of the segment; indusium fixed by the base and sides. Two confused species. Normally terrestrial. DAVALLIEJE — ODONTOSORIA. 57 (1) O. chinensis (L.) J. Sm. (Lindsaya tenuifolia (Sw.) Christ.) Rhizome stout, creeping, densely fibrillose; stipe stout, erect, polished, naked, dark brown, 15 to 30 cm. high; frond 30 to 45 cm. long, half as broad, ovate, quadripinnatifid ; lower pinnae ovate-lanceolate, 10 to 15 cm. long, half as broad; pinnules lanceolate, their segments cut down to the rachis below with toothed cuneate lobes, texture subcoriaceous, both surfaces naked, the upper shining; sori terminal, usually solitary, often rather broader than deep. Tonglon, 1,500 m., and Filad, 1,200 m., Loher 61; Sampaloc, Tayabas, Warburg 12762, Nueva Ecija, Merrill 203. Madagascar to Japan and Polynesia. (2) O. retusa (Cav.) J. Sm. Stipes strong, erect, not prickly or climb- ing; frond tripinnatifid; lower pinnae 30 to 40 cm. long, 15 to 20 cm. broad; pinnules lanceolate-deltoid, the lower segments the same shape, 5 cm. long,. 2 cm. broad, cut down to the rachis below, cunneate; texture herbaceous; sori narrow, marginal, occupying the whole breadth of the lobes. Sampaloc, Tayabas, Warburg 12761; Limutan, Morong, Loher 62; south- ern Luzon, Baranda 15; Benguet, Elmer 5917, 6004, Topping 334, 289; Davao, Copeland 970 and 1260. To New Caledonia. (19) DENNSTAEDTIA Bernhardi. Rhizome hairy, the stipes not articulate to it; fronds at least bipin- nate; sori marginal; indusium united with the margin of the frond. to form a sharply differentiated globose receptacle. Rather large ferns, superficially resembling Dicksonia, and formerly included under it. 1. Rachises not prickly. 2. Sori at bottom of sinuses. 3. Lower surface tomentose-glandular (1) D. Smithii 3. Frond glabrous _ (2) D. cuneata 2. Sori on ends of teeth. 3. Rhizome creeping, frond tripinnatifid (3) D. scabra 1. Rachises prickly, rhizome scandent (4) D. scandens (1) D. Smithii (Hk.) Christ. Frond tripinnate; lower pinnae 3 dm. long, 1 dm. broad; pinnules linear-acuminate, their divisions distinct, rather distant, narrow, acute, the lower ones 12 mm. long, 4 mm. broad, slightly . inciso-pinnatifid ; rachises and under surfaces densely tomentose- glandular; texture subcoriaceous; sori 2 to 8 to a segment; receptacle subglobose, cupshaped, 0.5 mm. across. Luzon, Cuming; Rizal, Loher; Davao, Warburg 14134. DeVore and Hoover 333, from Davao, is probably this species, but has the segments of the pinules obtuse. Java, Formosa. (2) D. cuneata (Hk.) Christ. Frond ample, subdeltoid, quadripin- natifid; rachises stramineous, naked; pinnae lanceolate, 15 to 30 cm. long; pinnules close, short-stalked, lanceolate, 1 cm. broad; segments oblong- rhomboid, 2 to 4 mm. broad, inciso-pinnatifid, cuneate at base, sessile, more cut away on lower side; texture moderately firm; both sides green, 58 POLYPODIACE^E OF THE PHILIPPINE ISLANDS. glabrous; veins subflabellate ; sori at base of ultimate sinuses; receptacle cup-shaped, glabrous. Luzon, Cuming 231 ; Mount Arayat, Loher. Batjan. (3) D. scabra (Wall.) Moore. Rhizome wide-creeping; stipe 30 cm. high, scabrous; frond 25 to 80 cm. high, deltoid or lanceolate, bipinnate; pinnae lanceolate; pinnules quite distinct, the lower ones cut down nearly to the rachis into numerous pinnatifid oblong deltoid segments, herbaceous or subcoriaceous ; rachis and both surfaces more or less hairy ; sori 2 to G to the lower segments; receptacles cup-shaped, subglobose. Baguio, Loher. India to Celebes and Japan. (4) D. scandens (Bl.) Moore. Rhizome scandent; fronds sometimes several meters long, growing indefinitely at the apex, climbing by means of their prickly rachises, tripinnate, with the segments bearing broad teeth, flaccid; sori small, placed in the sinuses. Davao, Warburg 14160. Malaya and Polynesia. (20) MONACHOSORUM Kuntze. Rhizome short; stipes therefore clustered, not articulate to the rhizome; frond large, finely dissected; sori a little below the tips of the veins, indusium wanting. The Philippine species is a fairly large terrestrial fern, of very doubtful affinity. (1) M. subdigitatum (Bl.) Kuhn. Stipes tufted, firm, 20 to 50 cm. high, stramineous, glabrescent; frond 45 to 60 cm. high, hardly as broad, quadripinnate; pinnae horizontal, the lowest 20 to 30 cm. long, 10 to 15 cm. broad; pinnules lanceolate, their segments cut down in turn to their rachis into divisions which in the lowest part of the frond are deeply bifid, pellucido-herbaceous, dark green, turning back in drying, glabrous; vein one in each ultimate segment, not reaching the margin; each vein bearing one sorus below its apex. Davao, Warburg 14178, DeVore and Hoover 323, Copeland 1032, 1143. India, Malaya. (21) SCHIZOLOMA Gaudichaud. Fronds in the Philippine species tufted, pinnate ; pinnae not dimidiate ; veins free; sori forming a continuous submarginal line, protected by the more or less inflexed margin and the continuous extrorse indusium. Our first species, not hitherto known from the Philippines, has the 'aspect of an Asplenium, and in its fructification is strikingly like Vittaria, to which genus it was first referred; its nearest relatives are probably in Lindsaya. (1) S. divergens (Wall.) Diels. Stipes erect, about 10 cm. high, black, polished; frond 15 to 30 cm. high, 3 to 4 cm. broad; pinnae close, horizontal, except the lower ones which are strongly deflexed and much reduced, lanceolate, obtuse, entire, obliquely truncate on the lower side DAVALLIEJE — SCHIZOLOMA. 59 and obtusely auricled on the upper at the base, subcoriaceous, glabrous; veins inconspicuous, forked, costa wavy; sorus slightly interrupted, or continuous around both sides and the apex. E-wi-ig River, Paragua, Merrill 769. Malaya. (2) S. heterophyllum (Dry.) J. Sm. Rhizome short, creeping, clothed with fine, brown scales; stipes clustered erect, 5 to 15 cm. high, naked, green above; frond 10 to 20 cm. high, pinnate and lanceolate or bipinnate and deltoid; pinnae semiorbicular and fixed by the middle of the straight side with radiate venation and continuous submarginal indusium around the upper side, 'or triangular with indusium along two sides, or trapezoidal with usually continuous indusium along upper and outer sides, outer acropetal angle rounded or acute, margin entire or finely toothed, papyra- ceous, glabrous; veins free except in sorus, or anastomosing more freely. An exceedingly variable fern, some of whose forms are hardly distinguish- able from Lindsaya. Luzon, Cuming 275; Mount Mariveles, Copeland 1375, Whitford 1162, Topping 351. Mauritius to Honkong and Malaya. (22) LINDSAYA Dryander. Rhizome short or creeping, stipes not articulate to it; fronds at least pinnate; the lower half of each pinna (or pinnule) almost or quite undeveloped, the "midrib" therefore running along the entire lower margin; sori along or near the upper margin; indusia fixed by the base. Small ferns, terrestrial or epiphytic,, superficially resembling Adiantum. I. Veins free. 2. Fronds once pinnate. 3. Upper edge of pinnae entire or lobed less tban half way to costa. 4. Rhizome stout and scandent. 5. Simple sori about as deep as broad. 6. Upper margin, of pinna entire or lobed (1) L. repent 6. Pinna cleft nearly to rachis (2) L. hymenophylloides 5. Sori narrow. 6. In an unbroken line (3) L. scandens 6. In a broken marginal line (4) L. pectinata 6. Submarginal in the lobes.. (5) L. Merrillii 4. Rhizome not stout and scandent. 5. Pinnae less than 1 cm. long. 6. Frond very narrowly linear (6) L. gracillima 6. Frond not narrowly linear. 7. Stipe flexuous, pin- nae somewhat au- ricled (7) L. ovata 60 POLYPODIACE^E OF THE PHILIPPINE ISLANDS. 7. Pinnae not aurieled. 8. Lamina very thin (8) L. concinna 8. Lamina sub- coriaceous - (9) L. montana 5. Larger pinnae more than 1 cm. long. 6. Upper edge of pinnae very shallowly lobed (10) L. cultrata 6. Lobed one-third of way to costa (11) L. adiantoides 3. Pinnae deeply bifid (12) L. lohcriana 3. Pinna? repeatedly cleft to the costa. 4. Rhizome stout (2) L. hymenophylloidcs 4. Rhizome filiform (13) L. capillacea 2. Fronds when fully developed bipinnate. 3. Upper edge of pinnules entire, pinnules deep (14) L. Lancea 3. Shallowly lobed (15) L. rigida 3. Cleft nearly to the winged costa (16) L. triquctra 3. Cleft to the filiform costa (17)' L: blumeana (Diels puts the preceding two species in the next section.) 1. Veins anastomosing ; Synaphlebium. 2. Anastomoses well below the sori. 3. Pinnae dimidiate at base only (18) L. Sarasinorum 3. Dimidiate throughout. 4. Lobed one-third of depth (19) L. davallioidcs 4. Almost entire (20) L. lobata 2. Anastomoses in the sori only. 3. Rhizome stout (21) L. apoensis 3. Rhizome filiform (22) L. pulchella (1) L. repens (Desv.) Christ (Davallia Desv., H. and B.). Rhizome wide-creeping, paleaceous, climbing; frond simply pinnate, 20 to 45 cm. long, 2 to 4 cm. wide; pinnae 1 cm. long, about half as broad as deep, the lower line slightly curved, oblique at base, the upper rounded, nearly entire or crenately lobed; texture pellucido-herbaceous ; sori marginal, large, about as broad as deep, often confluent in the not crenate form. Luzon, Haenke, Cuming 50; Mount Mariveles, 1,400 m., Loher 59; Davao, Warburg 14109 and 14182. India and Mauritius across Polynesia. Very variable in size. (2) L. hymenophylloides Blume. Rhizome scandent, 1 to 1.5 mm. thick, paleaceous; frond sessile, simply pinnate, larger ones 20 cm. long, 2.5 cm. wide; pinna 15 mm. long, 6 mm. deep, cut down to a winged costa into linear-euneate, entire or forked segments, each bearing 1, or rarely 2, roundish sori; texture membranaceous, entire frond glabrous. Mount Mariveles, Merrill 3220, Copeland 229, at 1,200 m. altitude. Java and New Caledonia. Regarded by Hooker and Baker as probably a variety of L. repens. Put by Diels into § Synaphlebium; but our material has free veins. (3) L. scandens Hooker, Sp. Fil. I p. 205 t. 63 B. Rhizome stout, wide-creeping, scandent, paleaceous; frond 20 to 30 cm. long, 4 cm. broad, DAVALLIE^E — LINDSAYA. 61 simply pinnate; pinnae 2 cm. long, 12 nun^ broad, the lower line slightly decurved, the upper rounded, entire, the point broadly rounded, placed in a long row close together, but not imbricate; texture pellucido-herbaceous ; costa marginal; sori in a continuous marginal line. Philippines, Cuming ; Mount Dagatpan, Davao, Warburg 14142. Malay Peninsula. Said to be sometimes bipinnate, but very doubtfully distinct from L. pectinata. The two characterized by the stout scandent rhizome. (4) L. pectinata Blume. Rhizome stout, scandent, paleaceous; stipe erect, very short; lower fronds 50 cm. long, 3 cm. broad, simply pinnate; pinnae 15 mm. long, 6 mm. deep, the lower line nearly straight, the upper margin round, slightly crenate, the point blunt, close together but not imbricate; texture pellucido-herbaceous; sori in an interrupted line along the upper edge. Luzon, Cuming 186; Maquiling, Loher 60; Gimogon River, Negros, Copeland 53. Assam and Malay region. Habit of L. (Odontoloma) repens. Beside the typical fronds, old rhizomes produce finely dissected, much smaller sterile ones, resembling those of Asplenium epiphyticum and Stenochlaena (Teratophyllum) , or the fertile fronds of L. capillacea. (5) L. Merrilli Copeland. Rhizome stout, scandent, shining, sparsely clothed with spreading ferruginous paleae; stipe 2 to 5 cm. high, stout, slightly scaly, at the top, straw-color, like the rachis; frond about 80 cm. long, 4 cm. wide, pinnate; lower pinnae stalked, the larger ones 22 mm. wide by 9 mm. deep next the rachis, dimidiate, the base strongly drawn down, making the pinnae deepest there, apex usually acute, lower margin entire, upper inciso-crenate ; glabrous, membranaceous ; veins free; sori wider than deep, the acute tips of the lobes projecting over them. Baco River, Mindoro, Merrill 1774, on tree trunks in moist forest; Sablan, Benguet, Elmer 6124. (6) L. gracillima Copeland. Rhizome short; stipes densely tufted, erect brown, almost smooth, 5 cm. high; frond narrowly linear, about 320 by 9 mm., pinnate, glabrous; pinnae stalked, triangular or rhom- boidal, 4 mm. wide, 3 mm. deep, lower margin straight, upper rounded, entire, or when sterile crenate, the lowest pinnae minute; texture herba- ceous; veins free, flabellate; sori marginal, more often continuous. Caraballo Sur, Luzon, Merrill 287, on shady ground, altitude, 800 m. (7) L. ovata J. Sm. Rhizome short-creeping; stipe 5 to 8 cm. high, wiry, flexuose, black; frond 10 to 15 cm. long, 2 cm. broad, simply pinnate; pinnae 8 mm. long, 4 mm. deep, not imbricate, the lower ones with their own breadth between them, horizontally oblong, the point very blunt, the lower side obliquely truncate at the base, the upper slightly auricled; texture subcoriaceous ; sori in a continuous marginal line. Luzon, Cuming 175. (8) L. concinna J. Sm. Rhizome short-creeping; stipe 1.5 to 7 cm. long, wiry, erect; frond 10 to 30 cm. long, 12 to 17 mm. broad, simply pinnate; larger pinnae 7 mm. long, 4 mm. deep, very blunt on the outer 62 POLYPODIACE;E OF THE PHILIPPINE ISLANDS. edge, the upper edge very slightly crenate, the upper ones close together, but scarcely imbricate; texture pellucido-herbaceous ; sori in a continuous or slightly interrupted line along the upper edge. Luzon, Cuming 198; Tonglon, Loher 51; Gubat, Baranda 18, Lamao River, Bataan Province, Merrill 3779, Copeland 271, 231, 228 (with remote pinnae ) , Gimogon River, Negros, Copeland 67, 52 ( pinna? imbricate ) . Borneo. Baker says this is merely a variety of L. cultrata. (9) L. montana Copeland. Rhizome very short-creeping; ferruginous- scaly; stipes 1 to 3 cm. high, tufted, slender, flexuous, red brown below, upward becoming straw color and almost glabrous, like the rachis; frond 3 to 6 cm. high, 1.5 cm. broad, pinnate; pinnae stalked, 9 mm. broad, 6 mm. deep, the lower ones very deflexed, their lower margin reflex-arcuate, upper margin round, entire or incised, general shape semiorbicular, upper pinnae smaller, ascendent, with acute bases; texture coriaceo-membrana- ceous; veins free, flabellate; sori submarginal, usually continuous. Mount Mariveles, altitude, 1,100 m., Copeland 230, terrestrial. Different from L. concinna in the much shorter fronds, and deflexed, firmer, and much deeper pinnae. (10) L. cultrata Swartz, Syn. 119. Rhizome short-creeping; stipe 3 to 6 cm. long, wiry, flexuose, rich brown; frond about 20 cm. long, about 2 cm. broad, simply pinnate; largest pinnae 12 mm. long, 6 mm. deep, not imbricate, the lower margin straight or slightly curved, usually upwards, the upper edge slightly lobed, so that the continuity of the line of the fructification is broken, sometimes nearly entire, pinnae stalked; texture coriaceo-membranaceous. Luzon, Cuming 65, 243; Davao, Loher 50; Copeland 1268; Hinay-Gate, Baranda 19; Benguet, Topping 197, 308. Madagascar and Himalayas to Queensland and perhaps Japan. L. cultrata Sw. var. varia Copeland. Differs from the type in the much shorter frond and stipe, membranous texture, and very variable form of the pinnae. Baguio, on rocks along streams, apparently common, Elmer 6003, Top- ping 191, 198. (11) L. adiantoides J. Sm. (L. humilis Kuhn). Stipes nearly tufted, black, polished, wiry, 2 to 5 cm. high; frond 10 to 15 cm. long, about 2 cm. broad, simply pinnate; pinnae 1 cm. long, 6 mm. deep, the upper imbricate, the lower edge straight or slightly curved, the upper rounded and broadly lobed about one-third of the way down; texture pellucido- herbaceous; sori marginal in the lobes. Camarines Sur, Cuming 176; southern Luzon, Baranda 17. Java. (12) L. loheriana Christ, Bull. Herb. Bois. 6(1898) :144. Rhizome short-creeping, firm; stipes 2 cm. long, fasciculate, terete, slender but firm and erect, base purple; frond 12 cm. long, 1 cm. wide, lanceolate- acuminate, simply pinnate; pinnae alternate on 2 mm. long petioles, 5 mm. long, triangular-cuneate, lower edge entire, upper deeply bifid; lobes broadly cuneate, with evident, forked, free veins; sori terminal, single DAVALLIE.E — LIXDSAYA. G3 or double, the width of the lobe; indusium inflated; texture moderately firm; color yellowish, stipe stramineous. Baguio, Loher 56. Habit of a small and simple form of L. viridis Col. (13) L. capillacea Christ, Bull. Herb. Bois. 6(1898):144. Rhizome filiform, creeping and intertwined; stipe 15 mm. long, filiform, fuscescent, rachis green; frond 1 dm. long, 1 cm. wide, linear-lanceolate, acuminate, weak, -flaccid, subbipinnate; pinnae alternate, 5 mm. long, oblong-triangular, lower edge entire with costa close to it, upper edge incised almost or quite to the costa into 3 or 4 erect segments which are linear, narrowed upward, the lower segments forked; sori small, terminating the segments, flanked on each side by acute teeth. Maquiling, 600 to 1,000 m.; Loher 57; Baguio, Elmer 6020. The dissected sterile fronds adventive on old rhizomes of L. pectinata resemble this plant. (14) L. Lancea (L.) Christ (L. trapeziformis Dry.). Rhizome short- creeping; stipe strong, erect, 14 cm. long, green except at base; frond 10 to 20 cm. long, with a long entire point and 1 to 4 pairs of rather rigidly erecto-patent branches, pinna? (pinnules) about 2.5 cm. long, 1 cm. deep, the lower line nearly straight or curved downwards, the upper rounded, entire, closely placed, but scarcely imbricate; texture pellucido-herbaceous; sori in a continuous line below the upper margin. Xegros, Gimogon River, Copeland 66; Davao, Loher 52. Tropical America, Ceylon, Malay region. (15) L. rigida J. Sm. Rhizome wide-cree'ping ; stipe 10 to 15 cm. high, rigid, erect, prickly towards the base; frond with a long unbranched central point and 1 to 4 pairs of flexuose lateral branches, 10 to 20 cm. long; pinnules 6 to 8 mm. broad, 4 mm. deep, the lower edge often falcate, the upper three or four times bluntly, not deeply lobed, placed close together but not imbricated; texture very thick and coriaceous; veins prominent; sori in a marginal line on the lobes. Davao, Loher 55; Luzon, Baranda 20. Malay Peninsula. The color of the mature frond is sepia brown, and the pale veins stand out from the groundwork in relief. (16) L. triquetra (Baker) Christ (L. tenuifolia Bl.). Rhizome creeping, fibrillose; stipe strong, erect, 10 to 15 cm. high; frond with 2 to 7 pairs of pinnae and a terminal one; lateral pinnae spreading, with subrigid rachises, 10 cm. long, 1 to 2 cm. broad; pinnules cut down on the upper side into narrow simple or forked linear segments well toward the nearly straight costa; texture pellucido-herbaceous, both surfaces naked; sori small, terminal on the segments; indusium suborbicular. Leyte, Cuming 309; Davao, .Loher 58. Java to Samoa. (17) L. blumeana (Hk.). Rhizome creeping; stipe 10 to 15 cm. high, strong, erect; frond 20 to 30 cm. long, 15 to 20 cm. broad, bipinnate; pinnae rigid, erecto-patent, 10 to 15 cm. long, 1 cm. broad; pinnules thinly herbaceous, cut down on the upper side into very slender filiform simple 64 POLYPODIACE^G OF THE PHILIPPINE ISLANDS. or forked segments to a recurved filiform rachis; sori small, nearly terminal on the dilated apices of the segments; involucre suborbicular. Epiphytic. Leyte, Cuming 309. Celebes, Java. (18) L. Sarasinorum Christ, Ann. Bot. Buitenzorg. 15:101. Rhizome short-creeping; stipe 12 cm. high, reddish brown, clustered, brown-squa- mulose, as is the rachis; the rest of the plant glabrous, herbaceous in texture; frond 8 to 12 cm. long, simply pinnate or tripartite; pinnae (pinnules) halved at the base, becoming equilateral toward the apex; narrowly oval or rhomboidal, up to 3 cm. long, strongly bent outward, on the outside lobed into 4 or 5 lobes, which are often forked, broad, obtuse, with a thick, brown, apical sorus; veins freely anastomosing near the base, free toward the margin. Maquiling, Loher. Celebes. Differs from L. davallioides in that the pinnae are longer, narrower, arcuate-deflexed, and not dimidiate at the apex, and the lobes broader, deeper, and often forked. (19) L. davallioides Blume. Rhizome short-creeping; stipe 6 to 12 cm. high, firm, erect; frond with a long central point and one to three pairs of spreading curved branches, 4 to 8 cm. long; pinnae 1 cm. long, 5 mm. broad, the lower margin straight or slightly curved, the upper with 3 to 6 regular truncate lobes one-third the depth of the pinnae, placed close together but not imbricated; texture pellucido-herbaceous ; veins anastomos- ing below the base of the lobes; sori marginal in the lobes. Castillo, 800 m., Loher 53; Daet and Gubat, Baranda 16; Mount Mari- veles, Copeland 1380. Malay region. (20) L. lobata Poir. Rhizome short-creeping; stipe 10 to 20 cm. high, firm, erect; frond simply pinnate or with a long unbranched apex, and 1 to 6 pairs of erecto-patent branches, 7 to 20 cm. long; pinnules 10 to 13 cm. long, half as broad, the lower decurved principally at the base, the outer margin rounded, the upper entire or incised enough to interrupt the sorus, close-placed, but not imbricated; texture thinly pellucido-herbaceous ; veins anastomosing; sori marginal. Luzon, Steere; Paragua, Merrill 713. India to Polynesia and Queensland. Much resembling L. davallioides in general appearance, but the pinnules are deeper and not so much lobed. (21) L. apoensis Copeland. Rhizome 1 mm. thick, scandent, ferru- ginous, almost glabrous; stipes 12 to 18 cm. high, straight or flexuous, stout, the bottom rich brown, upward green and nearly glabrous, as is the rachis; frond about 20 cm. high, 6 cm. broad, pinnate; pinnae short- stalked, glabrous, herbaceous, the larger ones 40 by 7 mm., the lower margin arcuate, the upper incised into usually linear lobes, more deeply toward the end of the pinna; veins free except sometimes in the sori; sori small, roundish, just below the tip of the lobe. DAVALLIE^E LINDSAYA. 65 Mount Apo, Mindanao, altitude 1,600 m., Copeland 1181, DeVore and Hoover 365. (22) L. pulchella (Hk.) (Davallia § Odontoloma Hooker). Khizome slender, wide creeping, and much branched; stipe slender, wiry, erect, naked, reddish brown below, 2 to 4 cm. long; frond 15 to 25 cm. long, 10 to 17 mm. broad; pinnae slightly stalked, larger ones 8 mm. across, 5 mm. deep, the lower or all more or less curved upward, oblique at the base, the upper cut into 2 to 3 blunt lobes or entire; texture membra- naceous, rachis and both surfaces naked; sori small, placed in the lobes at a short distance from the edge; veins sometimes anastomosing at the apex, and then their sori confluent. "Manila," ~Nee, Cuming 217; Davao, Warburg 14189, Copeland 991 and 1116, altitude, 4,600 and 6,000 feet; Baguio, Elmer 6019. Fiji, Samao. 24036 5 IV. ASPLENIE^E. Sori superficial (not in grooves), springing from the sides of the fertile veins; indusium opening on the side away from the vein, or wanting; stipe not articulate to the rhizome. 1. Sori born along lateral veins or veinlets, not parallel to the midrib. 2. Indusium wanting. 3. Veins free, fronds pinnate (23) Conio gramme 3. Veins anastomosing, fronds simple. 4. Sori anastomosing copiously (24) Hemionitis 4. Sori seldom or never anastomosing. 5. Veins invisible, anastomosing through- out (25) Loxogramme 5. Veins visible, anastomosies marginal.... (26) Syngramme 2. Indusium present. 3. Veins forming regular areolse. 4. Indusium opening along its margin (27) Callipteris 4. Indusium rupturing irregularly (28) Allantodia 3. Veins free (unless at the margin). 4. Some sori double, on both sides of a vein, the free sides opening (29) Diplazium 4. All sori simple (30) Asplenium 4. Sori between two veins, indusia attached to veins, opening along middle (31) Triphlebia 1. Sori parallel to midribs (Blechnece). 2. Indusium wanting, rhizome scandent (32) StenocJilacna 2. Indusium present, mostly terrestrial. 3. Veins free between sori and margin (33) Blechnum 3. Veins anastomosing between sori and margin (34) Woodwardla (23) CONIOGRAMME F6e. Rhizomes creeping; fronds pinnate or bipinnate, glabrous, fertile frond nowise differentiated; veins pinnately arranged, forked, in Philippine material free; sori covering the veins from the midrib to well toward the margin, exindusiate, without paraphyses. Large terrestrial ferns, thin in texture. (1) C. fraxinea (Don) F6e (Gymnogramme Jwvf their more or less distinct forms and related species. 1. Veins free. 2. Fronds simply pinnate. 3. Pinnae cuneate at base (1) p. opaca 3. Pinnae truncate or cordate (2) P. longifolia 2. Lowest pinnae forked or pinnate. 3. Pinnules or segments of lowest pinnae 1 to 3. 4. F.ronds all equally pinnate. 5. Sterile fronds serrate. 6. Stipes pale (3) P. cretica 6. Stipes dark (4) P. melanocaulon 5. Sterile fronds not serrate (5) P. pellucida 4. Sterile fronds more pinnate than the fertile (6) P. ensiformis 3. Segments or pinnules of lowest pinnae at least 5. 4. Only lower side pinnatifld (7) P. semipinnata 4. Both sides incised. 5. Only pinnatifld. 6. Apex serrate (8) P. distans 6. Apex entire (9) P. heteromorpha 5. Pinnate P. dispar 2. Lower pinnae at least bipinnatifid. 3. Lowest pinnae not greatly enlarged. 4. Frond not over 1 m. high. 5. Fronds all alike (10) P. quadriaurita 5. Fronds dimorphous (11) P. grevilleana 4. Frond well over 1 m. high (12) P. excelsa 3. Lowest pinnae greatly enlarged (13) P. longipes 1. Veins forming areolae along costa, otherwise free. 2. Ultimate segments abruptly widened at base (14) P. patens 2. Ultimate segments not abruptly widened. 3. Lowest pinnae of moderate size. 4. Margin entire (15) P. biaurita 4. Sterile margin crenate, large fern (16) P. Tcleiniana 3. Lowest pinnae greatly enlarged (17) P. wallichiana 1. Veins more copiously anastomosing (18) P. tripartita (1) P. opaca J. Sm. Stipe strong, erect, pale, finely pubescent; frond 60 to 90 cm. high, oblong, simply pinnate ; pinnae in numerous opposite pairs, the largest 30 cm. long, narrowly linear, entire, cuneate at base, coriaceous, glabrous except for the costa beneath ;. rachis pubescent like the stipe; veins sunk in the frond and only visible as faint striations; indusium narrow, brownish. Samar or Cebu, Cuming 342. Celebes. (2) P. longifolia L. Stipes clustered, 15 to 30 cm. high, firm, erect, pale, more or less clothed at the base with pale brown scales; frond 30 to 50 cm. high, 10 to 20 cm. broad, attenuate below, simply pinnate; pinna? sessile, numerous, 10 to 15 cm. long, the lowest reduced, the upper linear, 100 POLYPODIACE.E OF THE PHILIPPINE ISLANDS. acuminate, entire, truncate or cordate or subauricled at the base, subcoria- ceous, glabrous; rachis naked or slightly scaly; veins close and fine, usually once forked; indusium membranous, yellowish brown. Luzon, Cuming 6 ; Cagayan-Luzon, Warburg 12214; Benguet, Loher, Manila, Loher, Warburg; Camarines, Albay, and Catanduanes, Baranda; Zamboanga, Challenger Exp. Tropical and warm-temperate lands, everywhere. (3) P. cretica L. Rhizome short-creeping; stipes 15 to 30 cm. high, erect, wiry, naked, polished, pale; frond 15 to 30 cm. high, 10 to 20 cm. broad; pinnae 2 to 6 pairs, the upper sometimes decurrent, ascending, the fertile narrowly linear, sterile broader, spinulose-serrate, the lowest pair usually cut about to the base into 2 to 3 linear pinnules, subcoriaceous, glabrous; veins fine, close, parallel, simple or forked; indusium membranous, pale. Rizal, Loher; Mount Mariveles, Merrill 3122; Masbate, Baranda; Davao, Copeland 700. Most warm countries; exceedingly variable. Pteris stenophylla Hook, and Grev. is a variety with 3 to 5 pinnae clustered at the apex of the stipe, collected on Corregidor by Cuming, Xo. 283, known also from India. (4) P. melanocaulon Fe"e. Rhizome erect, small; stipe slender, naked, black, shining, fragile ; total height 25 to 30 cm. ; frond ovoid, pinnate, with the basal pinnae forked to the base; pinnae stalked, linear, arcuate, sterile toward the apex and crenate, acuminate, membranous, glaucous; venation obscure, indusium broad. Treated as a variety of P. cretica in Synopsis Filicum. Isabela-Luzon, Warburg 11972; Benguet, Elmer 6160 (?) ; Rizal, Loher; Catanduanes, Baranda; Jolo Archipelago, Burbidge; Davao, Warburg 14121. (5) P. pellucida Presl. Stipe 30 cm. or more high, erect, naked, stra- mineous, frond 30 to 60 cm. high, ovate-lanceolate, simply pinnate, or the lowest pinnae forked; pinnae 3 to 6 pairs, sessile, linear, entire or serrulate toward the point, upper ones slightly decurrent, coriaceous, bright green, often glossy; veins conspicuous, fine, close, simple or forked; indusium membranous, brownish. Luzon, Haenke, Cuming 85; Benguet, Loher. Merrill's Xo. 3772, from the Lamao Forest Reserve, may be this or a form of P. longifolia with the lowest pinnae forked. Guinea, India, Malaya. (6) P. ensiformis Burman. Rhizome short, creeping; stipe of sterile frond 5 to 10 cm. high, of fertile, 10 to 30 cm. slender, erect, naked, stram- ineous; sterile from 10 to 15 cm. high, 3 to 8 cm. broad, bipinnatifid or bipinnate, the segments with rounded, dentate apex, obovate, about 10 mm. long; fertile frond 20 to 30 cm. high, pinnate; pinnae entire or the lower pinnatifid, 8 to 15 cm. long, linear, sterile apex serrate, upper ones adnate at base, herbaceous, glabrous; veins usually forked, not conspicuous. Exceed- ingly variable. Luzon, Cuming 45, 46; Manila Loher, Warburg 12745, Marave; Mindoro, PTERIDE.E — PTERIS. 101 Merrill 3347; Masbate and Bataan, Baranda; Capiz, Copeland 56; Davao, Copeland 375. India to Polynesia. (7) P. semipinnata L. Stipe about 30 cm. high, firm, erect, naked, bright chestnut brown; frond about 30 cm. high, half as broad, ovate-lance- olate, the upper part cut down to the rachis into close entire lobes, the lower two-thirds with 6 to 8 pairs of opposite distantly-placed pinnae; pinnae with long, entire points, and a broad entire wing on the upper side, but the lower side with several linear pinnules, sterile margins finely serrate, subcoriaceous, glabrous; veins simple or once forked; indusium mem- branous. Luzon, Cuming 258. Merrill's No. 3790, from the Lamao Forest Reserve, differs only in that all the divisions are shorter, and proportionally broader. India to Japan and Borneo. (8) P. distans J. Sm. Stipe about 15 cm. high, slender, erect, naked, pale; frond about 30 cm. high, 10 to 15 cm. broad, upper part long, linear, sharply serrate, below this 12 to 20 pairs of close short lobes, the lower two- thirds of the frond with 6 to 9 pairs of opposite, distant, linear-pointed pinna?; each with a few spreading pinnules at its base, coriaceous; rachis scabrous; veins conspicuous, simple or once forked; sterile lobes finely spinulose-serrate ; indusium membranous. Luzon, Cuming 410. (9) P. heteromorpha Fee. Stipe 15 to 30 cm. high, naked, erect, pale; frond 30 to 45 cm. high, half as broad, ovate-lanceolate, the upper part with a long entire terminal point, below which it is sinuate and furnished with a few short, linear lobes; pinna? in several opposite pairs, the lowest of which are 1 dm. apart, the upper ones entire or slightly compound at the base, the lowest pair cut down nearly to the rachis, with several spreading linear pinnules on each side, subcoriaceous, glabrous, the margins slightly crisped; veins conspicuous, usually once forked; indusium narrow, mem- branous. Luzon, Cuming 409 ; Rizal and Manila, Loher. Celebes. P. dispar Kunze is a fern differing from P. semipinnata only in that the upper side of the pinnae as well as the lower, is more or less pinnate; they are hardly specifically distinct. Isabela-Luzon, Warburg 11613. China and Japan. (10) P. quadriaurita Retz. Stipe 30 to 60 cm. high, strong, erect, naked or slightly scabrous, stramineous or brownish; frond varying from 15 to 100 cm. in height, 10 to 30 cm. or more broad, with a terminal, central pinna cut down nearly to the rachis into numerous, close, parallel linear- oblong lobes 1 to 2 cm. long, 4 to 6 mm. broad, the sterile ones entire or slightly serrate; lateral pinnae several pairs, 15 to 30 cm. long, 2 to 5 cm. broad, the lowest ones usually again compound, having 1 or 2 similar but smaller pinnules branching from the base on the lower side, all cleft to the rachis into close, erecto-patent, entire, linear or linear-oblong segments; 102 POLYPODIACEJE OF THE PHILIPPINE ISLANDS. veins conspicuous, usually once forked; sori often continuous along the whole margin of the segments. Luzon, Cuming 69, 79; Isabela-Luzon, Warburg 11612; Nueva Vizcaya, Merrill 234; Benguet, Topping 287, Elmer 5619, 6213; Arayat, Loher, Merrill 3813, puberulous; Lamao River, Copeland 239; Manila, Warburg, Merrill 642 ; Camarines and Masbate, Baranda; Jolo Archipelago, Burbidge; Davao, Warburg 14120, DeVore and Hoover 254, Copeland 667. We have many more specimens very near this. All warm countries. P. quadriaurita var. setigera Hooker is a form with fine, spine-like scales on the rachises and main veins, at least on the dorsal surface, and usually more linear segments. Luzon, Cuming 253,413; Cagayan-Luzon, Warburg 12215; Arayat, Merrill 3814; Rizal, Loher; Basilan, DeVore and Hoover 93. India, Hongkong. (11) P. grevilleana Wall. "Dimorphic, barren stipe shorter, winged toward the apex; barren frond pedately 5-fid, scarcely pinnate, margin spinulose-serrate; fertile frond with 5 pinnae, the lower pair bipartite, veins exceedingly obscure. Suspiciously like P. quadriaurita, except that the fronds are dimorphic." Benguet and Rizal, Loher. India. (12) P. excelsa, Gaud. Stipe thick, erect, naked, glossy, pale brown; frond nearly 2 m. high, sometimes more; terminal pinna 30 cm. or more long, 8 cm. broad, with numerous close, falcate, linear lobes on each side, which are sometimes more than 5 cm. long, hardly 1 cm. broad, narrowly obliquely decurrent, and slightly serrate where sterile; lateral pinna several, similar to the terminal one, the lowest remote, sometimes bipartite, subcoriaceous, glabrous; veins once forked; sori not reaching the apex of the segments. Philippines, Gaudichaud. Himalayas, Hawaii. (13) P. longipes Don. Stipe 30 to 60 cm. high, erect naked, stramine- ous; terminal pnina about 15 cm. high, linear, cleft to the rachis into numerous erecto-patent, linear-oblong lobes which are obtusely toothed toward the point when sterile; lateral pinnae numerous, close, the longest simple ones about 15 cm. long, the lowest pair compound, sometimes nearly as large as the whole of the rest of the frond, 30 cm. long, 15 cm. broad, herbaceous, glabrous; veins not prominent, forked; sori falling short of the apex of the segments. Costa of pinnules sometimes spinulose on the upper side. Luzon, Cuming 8; Masbate, Baranda. India to New Guinea. (14) P. patens Hooker. Stipe 30 cm. or more high, erect, naked glossy, chestnut brown; frond ample, 1 m. high, 60 cm. or more broad; terminal pinna 15 to 25 cm. long, 4 to 5 cm. broad, with several linear lobes on each side, which are widened suddenly near the base on each side, the sterile ones slightly serrate; lateral pinnae numerous, similar but larger, some- PTERIDE^E— PTERIS. 103 times 45 cm. long, 5 cm. broad, the lowest forked, scarcely coriaceous, glabrous; veins oblique, not conspicuous, usually forked, sori reaching nearly to the end of the segment. I am sceptical as to the anastomosing of the veins. Luzon, Cuming 103; Davao, Warburg 14123. Himalayas to Japan and Polynesia. (15) P. biaurita L. Stipe 30 to 60 cm. high, strong, erect, naked, stram- ineous; frond with a terminal pinna 15 to 30 cm. long, 3 to 5 cm. broad, cut down within about 5 mm. of the rachis into numerous spreading linear- oblong lobes; lateral pinnae several pairs, similar to the terminal one, the lowest rather remote and usually once forked, segments entire, obtuse, papyraceous or subcoriaceous, glabrous ; veins evident, forming single areolas along the costa of the pinna but entirely free in the segments. Rizal, Uarave 130. Pantropic. P. armata Presl. "Fronds cordate-ovate glabrous glaucescent pinnate, pinnae opposite sessile pinnatifid lowest ones bipartite, segments linear obtuse entire unequal, terminal one elongate, repand, secondary rachises and costa above spinose, stipes smooth." This is probably P. quadriaurita var, setigera, fitting perfectly with the plant from Arayat. Sorsogon, Haenke. (16) P. kleiniana Presl. Total height 2 m.; frond pedately ovate, pinnate; pinnae broadly lanceolatej long-caudate, deeply pinnatifid into subfalcate segments, crenate where sterile, submembranaceous ; sori falling well short of the apex of the segments; otherwise like P. biaurita, with which Hooker and Baker unite it. Cagayan-Luzon, Warburg 11617, 12202. India. (17) P. wallichiana Agardh. Stipe about 15 cm. high, strong, naked, glossy, bright chestnut brown; frond tripartite with lateral divisions again forked, the central often 60 cm. long, 30 cm. broad, with numerous lanceolate, sessile, opposite pinnules, the largest of which are 15 cm. long, 2 cm. broad, cut down within about 2 mm. of the costa into numerous contiguous linear-oblong lobes, the sterile ones nearly entire, herbaceous, glabrous; lateral pinnae nearly as large as the terminal one; veins not conspicuous, forming single areolse along the costa between the main veins, rarely another areola at the base of the main vein; sori continuous along nearly the entire margin. Luzon, Cuming 204, Lobb 481. ,' Himalayas to Samoa. (18) P. tripartite Sw. Stipe 30 to 100 cm. or more high, strong, erect, naked, polished, stramineous or brownish, like the rachises ; frond tripartite, the central part 60 cm. or more long; terminal pinna 15 to 25 cm. long, 15 to 30 mm. broad, cut deeply into numerous close, linear or oblong lobes, which are subfalcate and slightly toothed where sterile, herbaceous, glab- rous; lateral pinnae numerous, close, all unbranched; lateral divisions similar, but shorter and usually branched; veins fine, anastomosing chiefly along the costa and main veins, sori not reaching the apices of the segments. 104 POLYPODIACEJE OF THE PHILIPPINE ISLANDS. Luzon, Cuming 41, 204; Isabela-Luzon, Warburg 11616; Benguet, Loher, Elmer 6028; Lamao River, Copeland 242; Rizal, Ramos; Laguna, Loher; Mindoro, Merrill 877; Masbate (?), Baranda; Paragua, Merrill 824a; Tropics, Africa across Polynesia. (43) HISTIOPTERIS Agavdh. Rhizome wide-creeping; stipe polished, stramineous to purplish; frond bi-quadripinnatifid, lowest pinnules usually stipule-like; sori as in Pteris, but commonly continuous around the sinus, and the spores bilateral instead of tetrahedral. A genus of pantropic terrestrial ferns, usually all reduced to a single species. (1) H. incisa (Thunb.) Agardh. Entire height commonly 2 in.; stipe stout, erect, sometimes muricate toward the base; frond ovate or narrower, bi-tripinnate; uppermost pinnae with entire oblong or linear-oblong pin- nules ; those next below with numerous long, pinnatifid pinnules, the lowest of which are close to the rachis and often adnate to it ; lowest pinnae often very large, and quadripinnatifid, herbaceous or subcoriaceous, glabrous or glaucous beneath; veins anastomosing to form several series of areolse, free near the margin; sori interrupted, or continuous around the sinuses .and apices of the segments. Luzon, Cuming 192; Baguio, Topping 239, Elmer 6007; Mount Mariveles. Tropics and farther south. (2) H. montana Copeland. Rhizome beset with minute, brown palese; stipe firm, 10 to 20 cm. high; frond 15 to 30 cm. high, often broader than high, bi-tripinnatifid, lowest pinnae slightly larger than succeeding, very coriaceous; veins prominent, raised above upper surface; indusia broad, margin everywhere rolled in, giving segments a lomarioid appearance. Mount Apo, above 2,500 m.; DeVore and Hoover 332, Copeland 1049. (44) PTERIDIUM Gleditsch. Rhizome creeping, scaly; stipe with many flbro- vascular bundles; frond at least bipinnate, deltoid; sorus on an intramarginal strand connecting the ends of the veins, covered by an extrorse indusium, and this by the inflexed margin of the frond; spores tetrahedral. A single polymorphous species. (1) P. aquilinum (L.) Kuhn. Rhizome stout, wide-creeping, under- ground; stipe 30 cm. or more high, strong, erect, naked, stramineous or light brown; frond 60 to 100 cm. or more high, 30 to 60 cm. broad; upper- most pinnae simple, the next pinnatifid, then pinnate ; the lowest the largest, bipinnatifid or tripinnatifid, coriaceous, glabrous. Lepanto and Benguet, Loher. Cosmopolitan, chiefly northern. P. aquilinum var. lanuginosum Bory. Fronds evidently pubescent or silky-tomentose beneath; pinnules more generally and regularly pinnatifid. Luzon, Cuming 24, 100; Bohol, Cuming 353. Cosmopolitan, chiefly tropical. Topping, No. 242, from Baguio is a mixture, perhaps including both forms of this species. PTERIDEJE — PAESIA. 105 (45) PAESIA St. Hilaire. Rhizome creeping; stipe with a single horseshoe-shaped fibro- vascular bundle; otherwise like Pteridium, except that the extrorse indusium is sometimes wanting, and the spores are bilateral. (1) P. rugulosa (LaB.) Kuhn. Stipe and rachises slender, glutinous- pubescent, castaneous; frond quadripinnatifid, rhomboidal; pinnae close, erecto-patent, under 30 cm. long; pinnules close, lanceolate, nearly sessile, 1 cm. broad; segments lanceolate, cuneate-truncate on lower side at base, the lower deeply pinnatifid with oblique blunt lobes, subcoriaceous, glutinous and minutely furfuraceous especially below, dull green; sterile segment serrate, fertile with revolute margin, the sorus reaching to the costa. Mount Data, Lepanto, in pine forest, Loher. New Caledonia, Otaheite ( ?) . I do not know this fern, but find nothing in the descriptions to indicate that it has an extrorse indusium; its aspect must be that of Hypolepis, to which it was assigned by Hooker. VI. VITTARIR3E. Fronds simple and entire, not articulate to the rhizome; veins free or anastomosing without free included veinlets; sori marginal or dorsal, linear, usually immersed. Small ferns, mostly epiphytic. 1. Sori single, lines parallel to the costa, fronds grass-like. 2. Sori on or near the coeta ; (46) Monogramme 2. Sori in or near the margin (47) Vittaria 1. Sori following the veins and anastomosing with them, fronds broader v (48) Antrophyum (46) MONOGRAMME Schkuhr. Rhizome creeping; fronds (in our species) scattered, small, linear, with- out other veins than the costa, glabrous; sorus on or near the costa, usually protected by an outgrowth of leaf-tissue. Exceedingly simple epiphytes. 1. Sori on the costa (1) M . trichoidea 1. Sori beside the costa. 2. Outgrowth of tissue on both sides of costa (2) M. paradoxa 2. Outgrowth of tissue on one side of costa (3) M. dareaecarpa (1) M. trichoidea J. Srn. Rhizome slender; fronds numerous, filiform, 10 cm. or less long; the fertile ones dilated in two or three places, and there bearing the sori, with high-raised edges on each side. Luzon, Cuming 160. (2) M. paradoxa (Fee) Bedd. Rhizome creeping, scaly; fronds form- ing a turf, 5 to 30 cm. long, 1 mm. broad, flaccid, herbaceous; sori sunk in a furrow on one or both sides of the costa. Philippines, according to Synopsis Filicum. Ceylon to Hawaii and Australia. (3) M. dareaecarpa Hooker. Rhizome clothed with minute, narrow, brown scales; fronds forming a turf on living trees, about 2 cm. high, hardly 1 mm. broad near the top, subacute, narrowed downward but without a distinct petiole, the fertile taller and relatively more slender than the sterile, often notched at the apex by the projection of the pseudo-indusium ; sorus along one side of the costa, covered by an outgrowth from it reaching almost to the margin, confined to the apex of the frond, not more than 3 mm. long. Gimogon River, Negros, Copeland 63. Labuan, New Guinea ( ? ) . The Xegros plant differs from the type in the absence of a distinct stipe, and the very short sorus. 106 VITTARIEJE — VITTARIA. 107 (47) VITTARIA Smith. Khizorue creeping; fronds grass-like, more or less tufted; veins free; sori in continuous marginal or intramarginal lines. Epiphytes in moist forests, very common. There is no genus of ferns whose species are more difficult of determination. The following list by no means exhausts the Philippine species; but includes all of whose identity and distinctness I feel certain. 1. Sorus in a two-lipped marginal groove (1) V. elongata 1. Sorus a slightly intramarginal line, with the margin rolled back over it at first. 2. Sorus narrow, fronds thick. 3. Sori subimmersed (2) V. lineata 3. Sori immersed (3) V. falcata 2. Sorus broad, fronds thin (4) V. scolopendrina (1) V. elongata Sw. Fronds 15 to 60 cm. long, seldom 1 cm. broad, acute or obtuse, coriaceous; veins simple, oblique, immersed, parallel, con- nected by the intramarginal soriferous veinlet ; sori quite sunk in a marginal groove with two nearly equal lips opening outward. As defined here, this species includes V. ensiformis Sw., collected in Luzon by Cuming, nos. 28 and 76, and several other rather diverse forms. Malanipa, Zamboanga, Challenger Exp.; Jolo Archipelago, Burbidge; Benguet and Rizal, Loher; Mount Mariveles, Copeland 1401 ; Mount Apo, Copeland 992. Tropics of Eastern Hemisphere. (2) V. lineata Sw. Frond 15 to 50 cm. long, less than 1 cm. broad, at- tenuate below, passing insensibly into the stipe, coriaceous; costa reaching the apex, veins immersed, parallel, oblique; sorus intramarginal in a shallow groove, protected when young by the margin of the frond. Benguet, Loher, Topping 219, Elmer 6125, 6277; Mount Arayat, Loher, Merrill; Mount Mariveles, Copeland 221, 222; southern Luzon, Baranda; Xegros, Copeland 57. Pantropic. V. lineata, var. trichoides Christ. Differs from the typical form in having fronds only one-half mm. broad, and the margin so folded over the sorus that it may scarcely appear. Davao, Warburg 14151. (3) V. falcata Kunze. Frond 10 to 15 cm. long, 3 mm. broad, obtuse, narrowed gradually to the base, very thick ; costa reaching the apex of the sterile but not of the fertile fronds, veins short, oblique, parallel, immersed ; sori quite sunk in slightly intramarginal grooves. V. minor Fe"e is a smaller fern included here. Rizal, Loher. Malaya. (4) V. scolopendrina Mett. Fronds 30 to 50 cm. long, 1 to 2 cm. broad, acute, contracted gradually to the base, coriaceous, but not exceedingly thick; costa thick, veins fine, oblique, simple; sorus in a rather broad submarginal groove protruding slightly from the upper surface, protected at first by the margin. Catanduanes, Baranda; Davao, Warburg 14152. Paleotropic. 108 POLYPODIACE^E OF THE PHILIPPINE ISLANDS. (48) ANTROPHYUM Kaulfuss. Rhizome short, creeping, clothed with copious very narrow brown palese; fronds clustered, simple, entire, rather thick; veins anastomosing, without free included veinlets; sori along the veins, in general lengthwise of the leaf and anastomosing with the veins. Aside from Vittaria, the nearest relatives of Antrophyum in our flora are Loxogramme, treated by Blume as a section of it, and Hemionitis, under which the first species were described. The species are variable, and not at all sharply distinguishable. 1. Stipe long (10 cm.) (1) A. plantagineum 1. Stipe short or none. 2. Costa reaching half way up the frond (2) A. semicostatum 2. Costa disappearing near base of frond. 3. Apex broadly rounded (3) A. obtuswn 3. Apex obtuse or acute. 4. Frond broad, sori free (4) A. callaefolium 4. Narrow or sori anastomosing. 5. Frond very thick (5) A. coriaceum 5. Frond only moderately coriaceous. 6. Frond small (15 cm.), stip- itate, sori free (6) A. parvulum 6. Frond larger, sori usually anastomosing (7) A. reticulatum (1) A. plantagineum Kaulf. Stipes stout, glabrous, about 10 cm. high; fronds 10 to 20 cm. long, one-third as broad, broadest above the middle, acute at both ends, very fleshy when fresh; costa wanting but median line of frond sterile; sori copious, deeply immersed, anastomosing somewhat. Rizal, Loher; southern Luzon, Baranda; Davao, Copeland 632. India across Polynesia. (2) A. semicostatum Blume. Frond 15 to 40 cm. high, 5 to 8 cm. broad, broadest near the apex, narrowed abruptly to the acute apex, and gradually to the base or short stipe; costa blackish, visible half way up the frond; sori copious, anastomosing freely, rising above the surface. Sorsogon and Catanduanes, Baranda. Ceylon across Polynesia. (3) A. obtusum Kaulf. Fronds 2 to 6 cm. high, spatulate, gradually contracted from the broad, rounded apex to a short stipe, thin-coriaceous, very young fronds black-hairy; costa entirely wanting; sori in grooves but rising well above surface, forking, and sometimes anastomosing. Davao, Copeland 845, 931; Paragua, Merrill 786. Bourbon, Java. (4) A. callaefolium Blume. Fronds 15 to 30 cm. high, 4 to 8 cm. broad, "spatulate-lanceolate," abruptly contracted to the acuminate or obtuse apex, gradually to a base decurrent on a short stipe, coriaceous; costa wanting; sori free, rather straight. Rizal, Loher; Davao, Warburg 14161, DeVore and Hoover 277, Copeland 1253. Java, Celebes. VITTARIRiE — ANTROPH Yl M. 109 (5) A. coriaceum Wall. Fronds 15 to 20 cm. high, 1 to 2 cm. broad, narrowed gradually from the middle to the acute apex and usually sessile base, very thick; costa wanting; sori entirely immersed, confluent or not. Los Bauos, Loher. Himalayas, southern China, Malaya. (6) A. parvulum Blume. Fronds 10 to 20 cm. high, 1 to 2 cm. broad, at- tenuate from the middle to the acute apex and short stipe; costa wanting; sori rather sparse and straight, in grooves, mostly free. Mount Apo, Copeland 1117. Java. (7) A. reticulatum Kaulf. Fronds 15 to 50 cm. high, mostly about one- tenth as broad, exceedingly variable, broadest in the middle or near the apex, gradually or abruptly contracted to an acuminate or merely subacute apex, attenuate below to a sessile base, or (in Philippine specimens) short stalk, thin-coriaceous; costa black or green, usually visible for a few cen- timeters into the frond, sometimes wanting, venation very evident; sori usually copious and anastomosing, rarely sparse, or even reduced to two lines on each half of the lamina. This is our commonest Antrophyum, and in one or another of its forms approaches almost all the other species. Our commonest form is A. falcatum Bl., which is shorter-stalked than the type, but not really distinguishable. A. Cumingii Fee, Cuming 416, also col- lected in southern Luzon by Baranda, is likewise inseparable from it. Benguet, Elmer 6126; Mount Arayat, Loher; Mount Mariveles, Merrill 2540, Copeland 210, 211; Rizal, Merrill 2665; Davao, Copeland 974; Jolo Archipelago Burbidge. India across Polynesia. VII. POLYPODIES. Stipes articulate to the rhizome; indusium wanting. The fronds are simple or variously cut, the pinnae as a rule equilateral; veins free or variously anastomosing; sori terminal or dorsal on them, usually of definite form and size, superficial or less often sunken. 1. Sori linear, parallel to the midrib, sometimes spreading over the parenchyma (Taenitidce) . 2. Sori on sharply differentiated apex of frond (49) HymenoJepis 2. Sori not confined to a specialized apex. 3. Fronds pinnate, stipes not articulate to rhizome.... (50) Taenitis 3. Fertile fronds trident-shaped (51) Cliristopteris 3. Fronds entire (52) Drymoglossum 1. Sori usually round, sometimes elongate but not along costa. 2. Fronds with stellate pubescence, fronds simple (53) Niphobolus 2. Fronds naked, or pubescence not stellate. 3. No distinct brown basal fronds. 4. Sori definite, not spreading over paren- chyma. 5. Sori dorsal (54) Polypodium 5. Sori in reflexed outgrowths of margin.. (55) Lecanopteris 4. Sori spreading over parenchyma, confined to apical segments of frond. 5. Frond pinnate (56) Photinopteris 5. Frond pinnatifld (57) Dryostacliyum 3. Dimorphous, basal fronds brown and rigid (58) Drynaria (49) HYMENOLEPIS Kaulfuss. Rhizome stout, creeping, scaly; fronds simple, entire or repand, con- tracted to a sharply differentiated fertile apex; no distinct sori in the fertile region; veins anastomosing, with free included veinlets. Small or moderate sized ferns. (1) H. spicata (L. f.) Presl. (Including H. revoluta Bl. and H. ophio- glossoides Bl.). Rhizome creeping, scaly; stipe 2 to 4 cm. high, glabrous, stramineous or the base ebeneous; sterile part of frond 15 to 40 cm. high, one-tenth as broad, entire, attenuate to both ends, or more abruptly con- tracted above, glabrous, herbaceous or coriaceous, flat or carinate; fertile part narrowly linear, 5 to 25 cm. long, decurved. Epiphytic. Luzon, Meyen, Cuming 92; Benguet, Loher, Barnes Forestry Bureau 961; Mount Arayat, Loher, Merrill; Mount Mariveles, Copeland 213; Mount Apo, Copeland 1001 (very small), 1026. Madagascar to southern China and Polynesia. (2) H. platyrhynchos (J. Sm.) Kunze. (Macroplethus Presl.) Rhi- zome very short, scaly; fronds clustered, attenuate to almost sessile bases, 110 POLYPODIES — HYMEXOLEPIS. 1 1 1 sterile part about 25 cm. high, more than one-fifth as broad, margin wavy, both surfaces glabrous, coriaceous; fertile segment about 5 cm. high, more than one-fourth as broad, obtuse, with a broad laminal wing on both sides of the fertile area. Terrestrial or epiphytic. Luzon, Cuming 196, Steere; Benguet, Elmer, Barnes 960; Mount Arayat 800 m., Loher. Celebes. (50) TAB NIT IS Willdenow. Rhizome creeping, hairy; stipes not articulate to it; fronds simply pinnate; veins anastomosing, without free included veinlets; sori linear, about midway between margin and costa, usually uninterrupted. Terres- trial ferns of moderate size. Not very evidently related to its neighbors here, and perhaps better transferred with Platytaenia to the neighborhood of Gymnopteris. (1) T. blechnoides Swartz. Stipe 20 to 40 cm. high, fibrillose at base, glabrous above, brown or maroon; frond 20 to 50 cm. high; pinnae 3 to 6 pairs, 15 to 25 cm. long, linear-lanceolate, entire, acute at both endsr sessile or short-stalked, glabrous, coriaceous, bright green above, brownish below; sori rather nearer the margin than the costa. Sorsogon, Baranda; Negros, Copeland 71; Guimaras, Cuming 277; Para- gua, Merrill 719. Ceylon to Malaya. Platytaenia requiniana (Gaud.) Kuhn is a fern very like Taenitis in its vegetative characters, but with the entire back of the contracted fertile frond covered by sporangia. From the meager descriptions it seems likely to me that it is a Gymnopteris, but Diels places it next to Taenitis. Philippines, Ne'e. Moluccas to New Hebrides. (51) CHRISTOPTERIS Copeland. Rhizome creeping, scaly; fronds dimorphous, the sterile triangular, ample, the fertile tripartite into linear segments; veins anastomosing with free included veinlets; sori parallel and close to the costa, linear, finally covering the whole surface. Epiphytic. C. Sagitta (Christ) Copeland. Rhizome creeping or scandent, the young part densely beset with spreading cinnamon-colored hairs about 8 mm. long, which are deciduous, leaving older parts sparsely clothed with ferruginous scales about 4 mm. long; stipes fuscous or ebeneous, of sterile frond about 10 cm., of fertile about 20 cm. high, glabrous; sterile frond triangular, 15 to 20 cm. high, and broad, the points acuminate, with a trian- gular sinus 2 cm. high and wide where the stipe is attached, and broad shallow ones between the lateral points and the apex, glabrous, coriaceous; the 3 main ribs conspicuous, their branches strictly parallel, subevident; fertile frond cleft to within 1 cm. of the base into 3 narrowly linear some- what spreading obtuse segments 8 to 20 cm. long, 3 mm. broad. Benguet, Loher; Mount Mariveles, Copeland, Whitford 321; Borden Forestry Bureau 1339. 112 POLYPODIACE.E OF THE PHILIPPINE ISLANDS. (52) DRYMOGLOSSUM Presl. Rhizome creeping; fronds simple and entire, dimorphous; veins anasto- mosing; sori linear, parallel to the costa, mixed with peltate scales. Small epiphytic ferns, with apparent affinity to Niphobolus, from which they are distinguished by the form of the sorus. 1. Sorus remote from margin (Lemmaphyllum Presl). 2. Apex very obtuse (1) D. spatulatum 2. Apex subacute (2) D. carnosum 1. Sorus marginal (3) D, piloselloides (1) D. spatulatum Presl, Tent. Pterid. p. 227. Sterile frond elliptic- lanceolate, obtuse, with acute base, fertile linear-spatulate, very obtuse, with stipe 1 cm. long; sorus continuous but confined to the upper half of the frond. Manila, Meyen. This species is distinguished from D. carnosum Hooker by the stipitate but not decurrent, very obtuse fertile frond, and restriction of the sori to its upper half: as the last character often marks a stage in development, and D. carnosum is more or less stalked, D. spatulatum is a doubtfully distinct species. There is no other record of any form of D. carnosum from the Philippines, until the discovery of the following. (2) D. carnosum Hooker. Rhizome wide-creeping, slender, sparsely scaly; the sterile frond 5 to 6 cm. long, on a stipe 1 to 2.5 cm. long, rather obtuse, the fertile fronds linear-spatulate, about 5 cm. long, 6 mm. broad, on a stipe 3 to 4.5 cm. long, subacute, attenuate to the stipe; texture coria- ceous; areolse large, with few free usually hamate veinlets; sori nearer the midrib than the margin. Mount Santo Tomas, Benguet, Elmer 6562. Himalayas, Formosa, Amboyna. (3) D. piloselloides Presl. Rhizome firm, wide-creeping, with black roots; sterile fronds obovate-elliptical 2 to 3 cm. long, 12 to 15 mm. broad, fertile ones linear:oblong, 5 to 10 cm. long, 4 to 5 mm. broad, both narrowed to a short stem, coriaceous; veins immersed, with copious free included veinlets; sori in a broad continuous submarginal line. Luzon, Cuming 115, Steere; large long-stipitate sterile fronds collected by Loher on Tonglon are ascribed by Christ to this species; Davao, Copeland 349. India to Celebes. (53) NIPHOBOLUS Kaulfuss. Rhizome creeping; fronds simple, almost always entire, coriaceous, with stellate pubescence; veins anastomosing, with free included veinlets. Small epiphytes, recognizable superficially by the narrow, rigid fronds. 1. Areolse regular, with included veinlets running toward margin. 2. Fronds not, or but slightly, dimorphous. 3. Lower surface loosely and copiously woolly. 4. Frond 2 to 3 cm. broad (1) N. fissus 4. Frond about 1 cm. broad (2) N. ftocciger POLYPODIES — NIPHOBOLUS. 113 3. Lower surface appressed — woolly. 4. Veins hidden (3) N. achrostichoides 4. Veins evident (4) N. Lingua 3. Lower surface very sparsely pubescent. 4. Veins evident (5) N. sphaerostichum 4. Veins hidden (6) N. varius 2. Fronds decidedly dimorphous. 3. Sterile frond nearly glabrous, spatulate.... (7) N. adnascens 3. Sterile frond orbicular, very woolly (8) N. nummulariaefolius 1. Areolse irregular, with included veinlets in various directions. 2. Stipe 2 to 10 cm. high. 3. Paleae of rhizome linear, entire (9) N. samarensis 3. Palese of rhizome ovate, serrulate (10) N. angustatus 2. Frond sessile (11) N. splendens (1) N. fissus Blume. Rhizome stout, short-creeping, clothed with squar- rose, lanceolate-acuminate ferruginous scales; fronds sessile or nearly so, 15 to 30 cm. high, 15 to 35 mm. broad, narrowed very gradually to botli ends, entire, subcoriaceous, upper surface naked, lower densely coated with soft woolly, ferruginous tomentum; veins invisible; sori close, scattered, immersed among the tomentum. Benguet, Loher. India, Java. (2) N. flocciger Blume. Rhizome wide-creeping clothed with squarrose lanceolate-acuminate scales which are ferruginous when young, turning white; stipes 30 to 45 mm. high, floccose-woolly ; fronds 20 to 30 cm. high, 6 to 10 mm. broad, acute, attenuate to base, entire, rigidly coriaceous, upper surface naked, lower densely matted with whitish or subferruginous to- mentum; veins invisible; sori immersed among the tomentum, covering the upper part of the frond. Luzon, Owning 93; Sorsogon, Baranda; Mount Arayat, Merrill 3820; Mount Mariveles, Whitford 312. India, Java. (3) N. achrostichoides (Forst.) J. Sm. Rhizome woody, wide-creeping clothed with roundish or elliptical scales, black except at the margin; stipes about 5 cm. high, stout, erect, glabrous or nearly so, conical at base and inserted into the branch of the rhizome specialized to bear it; frond 30 to 40 cm. high, 10 to 15 mm. broad, attenuate to both ends, entire, rigidly coria- ceous, upper surface naked, lower with a closely appressed whitish tomen- tum; veins invisible; sori distinct but contiguous, usually covering rather more than the upper half of the frond. Luzon, Cuming (88 -=Cyclophorus blumeanus Presl ?) 127; Los Banos, Loher; Negros, Copeland; Davao, Copeland. Ceylon to the New Hebrides and Queensland. (4) N. Lingua (Thunb.) J. Sm. (The Philippine form, described here is Polypodium heteractis Mett. and Kuhn. ) Rhizome wide-creeping, clothed with spreading, lanceolate, ferruginous scales; stipes about 10 cm. high, firm, erect; frond not much higher, oblong-lanceolate or oval, apex often cuspidate, base rounded, entire, coriaceous, upper surface naked, lower 24036 8 114 POLYPODIACEJE OF THE PHILIPPINE ISLANDS. matted with appressed tomentum; main veins distinct to the margin; sori rather prominent, in close rows of 4 to 6 between the main veins. Mount Mariveles, Loher. India to Japan and Malaya. (5) N. sphaerostichus (Mett.). Rhizome woody, wide-creeping, clothed with ovate, acuminate, brown, crisped scales; stipe 6 to 10 cm. high, firm, erect; fronds 10 to 15 cm. high, oblong-lanceolate, acuminate, base narrowed abruptly, coriaceous, upper surface naked, lower sparsely tomen- tose; main veins distinct to the margin; sori in several series between the transverse veinlets, confluent, covering the whole lower surface. Luzon, Cuming 127. Celebes. (6) N. varius Kaulf. Rhizome wide-creeping, clothed with scales whose long ferruginous or whitish tips are squarrose near the growing points, appressed farther back, then deciduous leaving the elliptical peltate bases, black in the center; stipes 2 to 5 cm. high, glabrescent ; fronds usually somewhat dimorphous, the fertile 15 to 25 cm. high, 1 cm. more or less broad, attenuate to both ends but more abruptly to the base, coriaceous, glabrous or nearly so on the upper surface, the lower very sparsely pubescent, sterile fronds usually shorter and relatively broader; veins invisible; sori distinct but contiguous, covering rather more than the upper half of the frond. Luzon, Meyen, Chamisso, Cuming 17, 67, 88, 135, 240; Benguet, Barnes Forestry Bureau 962, Topping 343; Mount Arayat, Merrill 3822; Corregi- dor, Cuming 286; Romblon, Copeland 301; Culion, Merrill 545; Samar, Cuming 323; Davao, Copeland 311, 938. Java to China and Mariannes. N. varius is construed here as including N. elongatus Bl., 2V. pertusus Spreng., AT. albicans Bl., 3T. Blumeanus Kunze, and AT. caudatus Ka.u\i. (7) N. adnascens (Sw.) Kaulf. Rhizome wide-creeping, clothed with scales whose slender tips are deciduous; stipes 1 to 4 cm. high, erect, puberulous; fronds dimorphous, the sterile rarely more than 6 cm. high, 10 to 15 mm. broad, broadest near the rounded apex, contracted to the stipe, the fertile usually 10 to 15 cm. high, 6 to 10 mm. broad, broadest below the middle, both coriaceous, both surfaces smooth or sparsely pubescent; veins invisible; sori distinct but contiguous, occupying more or less than the upper half of the frond, with dense pubescence between them. Manila, Loher; Tayabas, Warburg; Mount Arayat, Merrill 3821; Capiz, Panay, Copeland 102, 103; Davao, Copeland 554, 626, 656; a common epi- phyte over beaches. Africa to Fiji. (8) N. nummulariaefolius (Sw.) J. Sm. Rhizome very slender, wide- creeping, clothed with spreading bright-ferruginous fibrillose scales; stipes scaly, of the fertile frond erect, 5 to 15 mm. high, of the sterile much shorter, horizontal; fronds dimorphous, the sterile 10 to 15 mm. long, orbicular or elliptical, with or without a basal sinus, upper surface glabrous or sparsely stellate, lower with a very dense white or ferruginous tomentum, POLYPODIES — XIPHOBOLUS. 115 fertile frond about 3 cm. high, 6 mm. broad, widening toward the rounded apex, contracted gradually to the stipe; veins invisible; sori covering the entire back. Luzon, Cuming 246; Rizal Loher; Mount Arayat, summit, Merrill 3819; Mount Mariveles, Merrill 3757; Davao, Copeland 094 (along beach), 934. India to Celebes. (9) N. samarensis (Presl). Rhizome firm, wide-creeping, clothed with deciduous, spreading, white, linear scales; stipe 3 to 10 cm. high, firm, erect; frond 30 to 60 cm. high, 1 to 2 cm. broad, coriaceous, upper surface naked, lower with dense whitish tomentum; veins invisible by reflected light, anastomosing irregularly; sori confluent, occupying the whole surface of the contracted upper half of the frond. Samar, Cuming 323 in part; Albay, Baranda; Arayat and Mariveles, Loher. (10) N. angustatus (Sw.) J. Sm. Clothed with linear deciduous scales; stipe 6 to 10 cm. high, strong, erect; frond 15 to 30 cm. high, 2 to 5 cm. broad, very coriaceous, upper surface naked, lower clothed with appressed subferruginous tomentum; veins invisible by reflected light, forming fine irregular areolse; sori large, on the upper third of the frond, near the margin, sometimes confluent. Luzon, Cuming. India to Tahiti and New South Wales. (11) N. splendens J. Sm. Rhizome short, fibrillose; fronds tufted, sessile or nearly so, 30 to 40 cm. high, one-fourth as broad, obtuse, attenuate to base, coriaceous, upper surface with appressed scattered cottony fibers, lower with dense ferruginous tomentum; main veins distinct and evident to the margin, with straight cross-veinlets, the areolse thus formed divided into a few smaller ones, with a few free veinlets running in any direction; sori confluent, confined to the upper part of the frond, not reaching the margin. Rizal, Loher; Sorsogon, Baranda; Samar, Cuming 331; Davao, Copeland 684. (54) POLYPODIUM Linnaeus. Fronds articulate to the rhizome, the fertile and sterile rarely different, the sterile always green, glabrous or the pubescence not stellate; sori dorsal on the frond, dorsal or terminal on the veins, or on their anas- tomoses, without indusia. A very large genus, including ferns of every habitat, the Philippine species never bipinnate. The preceding and the four following genera are derived from Polypodium, and intimately related to some of its sections. The subgenera are sometimes regarded as genera, as also have been various minor divisions not recognized at all in this arrangement, but all are very intimately related, and their separation costs as much as it gains in convenience, beside demanding many new names. 1. Veins all free § Eupolypodium 1. Veins anastomosing to form regular areolse, each with a single free included veinlet running toward the margin and bearing the sorus § Goniophlebium 116 POLYPODIACE^E OF THE PHILIPPINE ISLANDS. 1. Veins anastomosing irregularly, with free included veinlets in various directions. 2. Base of frond like the upper part. 3. Rhizome not inflated nor inhabited by ants. 4. Sori not confluent nor in single rows between veins § Phymatodes 4. Sori in single rows between main veins and often confluent § Selliguea 3. Rhizome inflated and inhabited by ants § Myrmccophila 2. Base of frond brown and rigid § Drynariopsis § EUPOLYPODIUM. 1. Fronds simple and entire. 2. Fronds hirsute, with red or brown hairs. 3. Hairs in stellate clusters (1) P. ja.goria.num 3. Hairs solitary as a rule. 4. Fronds 3 mm. or less broad. 5. Hairs long and flexile (2) P. Christi 5. Hairs short and stiff (3) P. Merrillii 4. Fronds larger. 5. Veins trifld, stipe long (4) P. setigerum 5. Veins once forked. 6. Fronds obtuse (5) P. hirtellum 6. Fronds narrow, acute (6) P. setosum 2. Fronds glabrous. 3. Fronds stipitate. 4. Sori immersed (7) P. caespitosum 4. Sori superficial (8) P. fasciatum 3. Fronds sessile (9) P. sessilifolium 1. Fronds crenate or shallowly lobed. 2. Sori scattered (10) P. pleiosoroides 2. Sori in regular rows parallel to costa (11) P. lohenanum 1. Fronds pinnatifid very nearly to the rachis. 2. Sorus one on each segment. 3. Segments less than their own width apart.... (12) P. cucullatum 3. Several times their width between segments.. (13) P. gracillimum 2. Sori several on each segment (14) P. solidum 1. Fronds pinnate. 2. Veinlets simple. 3. Sori superficial. 4. Pinna? entire (15) P. inconspicuum 4. Pinnae slightly crenate. 5. Lamina hirsute (16) P. minutum 5. Lamina glabrous (17) P. macrum 4. Pinnae sharply toothed (18) P. subfalcatum 3. Sori immersed. 4. Sori parallel to costa (19) P. celebicum 4. Sori oblique to costa. 5. Young sorus almost inclosed. 6. Frond lax, 25 cm. or more long (20) P. obliquatum 6. Frond firm, usually smaller (21) P. decorum 5. Rim of cavity not covering sorus. 6. Rim of cavity elevated (22) P. craterisorum 6. Rim of cavity plane (23) P. subobliquatum 2. Veinlets forked. 3. Sori immersed (24) P. papillosum 3. Sori superficial (25) P. Leysii POLYPODIES — POLYPODIUM. 117 § GONIOPHLEBIUM. 1. Frond simple (26) P. nummularium 1. Frond pinnate. 2. Lamina glabrous. 3. Margin entire (27) P. verrucosum 3. Margin serrate (28) P. subauriculatum 2. Lamina hairy (29) P. molliculum § PHYMATODES. 1. Fronds simple, not deeply lobed. 2. Sori in a single row on each side of midrib. 3. Fronds more or less dimorphous, small. 4. Main veins evident. 5. Sori not restricted to upper half (30) P. neglectum 5. Sori restricted to upper half (31) P. rhynchophyllum 4. Veins obscure. 5. Fertile frond broad (32) P. accedens 5. Fertile frond linear (33) P. hammatisorum 3. Fronds alike, minute : (34) P. Rudimentum 3. Fronds alike, larger. 4. Sori round (35) P. stenophyllum 4. Sori oblong (36) P. longifolium 2. Sori in several rows or scattered. 3. Venation fine or obscure. 4. Frond narrowly linear (37) P. tenuilore 4. Frond linear-oblanceolate (38) P. punctatuin 4. Frond broadly oblanceolate (39) P. validum 4. Frond ovate (40) P. oodes 3. At least the main veins conspicuous. 4. Main veins falling short of margin. 5. Base attenuate (41) P. myriocarpum 5. Base rounded (42) P. linguaeforme 4. Main veins reaching margin. 5. Sori in two rows between main veins (43) P. triquetrum 5. Sori scattered. 6. Frond narrowed below. 7. Lamina membra- nous (44) P. membranaceum 7. Texture firmer. 8. Sori numerous. 9. S o r i round.. (45) P. Zippelii 9. Sori ir- regular (46) P. heterocarpum 8. Sori few, large (47) P. hemionitideum 6. Base of frond broad (48) P. musaefolium 1. Shallowly lobed or pinnatifid (49) P. anomalum 1. Deeply pinnatifld. (Fertile simple entire fronds rare.) 2. Sori small and scattered. 3. Textile coriaceous (50) P. pentaphyllum 3. Texture thin. 4. Stipe naked, winged almost to base (51) P. insigne 4. Stipe usually chaffy, less winged (52) P. pteropus 2. Sori large. 3. Fronds dimorphous (53) P. incurvatum 118 POLYPODIACELB OF THE PHILIPPINE ISLANDS. 3. Fertile and sterile fronds similar. 4. Sori superficial. 5. Sori uniseriate, rhizome scaly. 6. Frond green (54) P. triftdum 6. Lower surface blue (55) P. glaucum 5. Sori pluriseriate, rhizome naked (56) P. affine 4. Sori shallowly immersed, veins in- conspicuous (57) P. Phymatodes 4. Sori deeply immersed, veins evident. 5. Segments linear-oblong (58) P. nigrescens 5. Segments linear (59) P. longissimum 1. Fronds pinnate. 2. Main veins conspicuous. 3. Rachis mostly winged by decurrent pinnae.... (60) P. palmatum 3. Most of rachis not winged (61) P. angustatum 2. Main veins not conspicuous. 3. Spots of lime en upper surface (62) P. albidosquamatum 3. Without lime spots (63) P. lagunense § SELLIGUEA. 1. Frond simple and entire. 2. Frond membranous. 3. Rhizome scales linear, nearly black (64) P. Selliguea 3. Rhizome scales lanceolate, brown (65) P. macrophyllum 2. Frond coriaceous. 3. Apex caudate (66) P. caudiforme 3. Apex obtuse (67) P. vulcanicum 2. Frond exceedingly leathery (68) P. Elmeri 1. Frond deeply pinnatifid (69) P. ellipticum § MYBMECOPHILA. 1. Frond entire (70) P. sinuosum 1. Frond deeply pinnatifld (71) P. lomarioides § DBYNABIOPSIS. 1. No specialized fertile part of frond (72) P. heracleum 1. Sori restricted to contracted apical part of frond (73) P. meyenianum § Eupolypodium. (1) P. jagorianum Mett. Rhizome 3 to 10 cm. long, clothed with light- brown chaff; fronds clustered, sessile or narrowed to a very short petiole, the larger ones 10 cm. long and 6 mm. broad, entire, obtuse, coriaceous, clothed, especially near the margin and apex, with reddish hairs about 1 mm. long, usually in stellate clusters; veins almost invisible, forked once; sori near the midrib, on a linear-oblong superficial receptacle. Philippines Jagor 835; Castillo, Loher; Mount Mariveles, 1200 m. Merrill 3230, Copeland. (2) Polypodium Christ! Copeland n. Sp. Rhizome short, bearing de- ciduous stramineous paleae; stipes clustered, not articulate, 0 to 15 mm. high, beset with short hairs; fronds linear, 4 to 8, or rarely to 15 cm. high, 2 to 3 mm. broad, obtuse or subacute, very gradually attenuate downward, entire or nearly so, subcoriaceous, both surfaces bearing scat- POLYPODIES — POLYPODIUM. 119 tered, stiff, nearly black hairs 1 to 2 mm. long; veins immersed, forked; sori oblong, oblique, superficial, ultimately confluent. Epiphytic on mossy trunks. Mount Apo, Mindanao, Copeland 1520 (Type), 1101. I conceive this to be the plant from the same locality, Warburg 14140, determined by Christ as P. parasiticum Mett. "aut ei pro&imum;" and would have let my plants bear the same name and doubt, but that Mettenius' name is invalidated by P. parasiticum L. (3) P. Merrillii Copeland. Rhizome erect, short, clothed toward the apex with light-brown scales; fronds minute, the largest 23 mm. high, less than 2 mm. broad, linear-oblanceolate, obtuse, contracted gradually to a very short petiole or sessile, coriaceous, with a pubescence of short, straight red-brown hairs mostly confined to the upper surface and margin; midrib conspicuous, veins simple, almost invisible; sori superficial, near the midrib, and so large that they extend from near the margin to well across it, forming a single wavy line, about 6 sori on a frond. Paragua, Merrill 754, growing on rocks along a small stream in the mountains near the E-wi-ig River. (4) P. setigerum Blume. Rhizome erect or creeping, very short; stipes densely clustered, 3 to 6 cm. high, slender, densely beset with spreading cinnamon-colored hairs about 2 mm. long; fronds 15 to 25 cm. high, about 17 mm. broad, ligulate, obtuse or subacute, entire, herbaceous or subcoria- ceous, sparsely clothed throughout with soft hairs like those of the rachis; veins immersed, twice or three times forked; the sori round, large, super- ficial, dorsal on the first acropetal branch of each vein. Mount Apo, Copeland 1000, 1059, 1204, epiphytic in the mossy forest. Java and the Moluccas. (5) P. hirtellum Blume. Rhizome short-creeping scaly; frond 5 to 8 cm. long, one-tenth as broad, obtuse, entire, contracted gradually to the short stipe, subcoriaceous, sparsely clothed throughout with long, soft, brown hairs; veins hidden; sori in a single close row on each side of the costa, nearer to it than to the margin. Luzon, Steere. Java and Ceylon. (6) P. setosum (Blume, Christ). Stipes clustered on an erect rhizome, wiry, hirsute, about 2 cm. high; fronds 9 to 13 cm. long, about 7 mm. broad, narrowed toward both ends, but not acute, entire or very slightly wavy, subcoriaceous, sparsely hirsute; veins once forked, not or but slightly visible by reflected light; sori terminal on the short acropetal branch, superficial, round. Luzon, Cuming 222; Mount Mariveles, Copeland 215; Mount Apo, 1,800 m.; Copeland 1008. Java, Celebes. The Davao plant is typical; that from Mariveles differs in having longer hairs, more abundant near the margin, and veins quite invisible by reflected light, the fertile ones of the broader fronds not infrequently twice forked; but it is not safely separable. Neither can I distinguish P. Hookeri Brack., also reported from the Philippines. 120 POLYPODIACE.E OF THE PHILIPPINE ISLANDS. (7) P. caespitosum (Blume) Mett. Stipes clustered on a very short chaffy rhizome, 2 to 4 cm. high, wiry, weak, clothed with short weak hairs; fronds 8 to 15 cm. long, rather over one-twentieth as broad at the middle, gradually narrowed toward both ends, entire, subcoriaceous, usually quite glabrous; veins as a rule twice forked, inconspicuous; sori somewhat immersed, oblong, oblique to the costa. Mount Apo, 1,800 m. Copeland 1008a, 1009, 1010. Java. A very variable species, especially in the texture and venation, and the shape and direction of the sori; a form occurs rarely with two irregular rows of sori on each side of the costa. (8) P. fasciatum Mett. Rhizome strong, wide-creeping, clothed with broad gray scales ; stipes 2 to 5 cm. high, rigid, deciduously ciliate, frond 30 cm. or more long, 1 cm. broad narrowed gradually toward both ends, entire, coriaceous, glabrous; costa prominent, veins immersed, forked; sori super- ficial, oblong, arranged end to end close to the costa. Mount Data 2,250 m., Loher; a dwarf form, scarcely 7 mm. high, with stipe almost naked. Malaya. (9) P. sessilifolium Hooker. Fronds tufted, 7 to 22 cm. long, 4 to 6 mm. broad, narrowed gradually below the point, bluntish, entire or slightly undulate, subcoriaceous, glabrous; veins forked; sori oblong, placed end to end close to the costa. Luzon, Cuming 382. Malaya. (10) P. pleiosoroides Copeland. Rhizome short, creeping, its scales broadly lanceolate, acuminate, stramineous; stipe 2 to 4 cm. high, slender, densely beset with very short stramineous hairs; frond 10 to 15 cm. high, one-tenth as broad, lanceolate, contracted to both ends, coriaceous, glabrous, margin sinuate, especially toward the base, bearing a few short hairs; veins immersed, inconspicuous, about 4 times forked; sori large, round, superficial, in 1 to 3 irregular lines or altogether scattered. Mount Apo, 1,800 m., Copeland 1011, epiphytic. (11) P. loherianum Christ, Bull. Herb. Boiss. 6(1898) :197. Rhizome short, with purplish hairs; stipes clustered, 1 to 3 cm. high, naked; frond ligulate-lanceolate, 15 cm. high, 7 to 10 mm. broad, rather obtuse, gradually contracted to the base, crenate-dentate, the teeth of irregular width, 3 mm. or less deep; nervature inconspicuous, veins pinnate in the teeth; sori dorsal on the lowest acropetal veinlets, scarcely immersed, round or oval, in a row rather nearer the costa than the margin, rarely a second imperfect row present; texture coriaceous. Mount Data, 2,250 m., Loher. (12) P. cucullatum Nees. Rhizome short, scaly; fronds very densely tufted, nearly sessile, 7 to 15 cm. long, about 7 mm. broad, but little contracted toward the ends, flaccid, glabrous or nearly so, pinnatifid to the winged rachis into numerous obtuse segments 1.5 mm. broad, separated by less than their own breadth, each with a single conspicuous vein; POLYPODIES — POL YPODIUM. 121 sorus one in each segment, large, superficial, the lower half of the segment folded over it until maturity. Luzon, Cuming 206, Steere; Mount Mariveles, Copeland 216; Davao, Warburg 14188, Copeland 1005, 1061. Ceylon to Samoa. (13) P. gracillimum Copeland. Rhizome creeping or suberect, clothed with minute brown lanceolate scales; fronds in dense clusters, almost sessile, the larger ones 12 cm. long, 4 mm. broad, flaccid, glabrous through- out, pinnatifid almost to the rachis into numerous fine, acute, remote, decurrent, erecto-patent, alternate segments; one vein and one sorus to each segment, the lower half of the lamina folded over the sorus. Mount Apo, 1,800 m., epiphytic on mossy tree trunks, Copeland 1007. (14) P. solidum Mett. Rhizome short, erect, clothed with lanceolate ferruginous scales; stipes clustered, glabrous, 0 to 2 cm. high; frond 8 to 15 cm. high, 1 to 2 cm. broad, narrowed from the middle toward both ends, acute, pinnatifid down very nearly to the ebeneous rachis into erecto- patent sharply serrate or incised acute segments, coriaceous, glabrous or the lower surface glaucous; main veins of the segments conspicuous, veinlets invisible, simple; sori large, round, costal. A small, relatively narrow form, with short, broadly triangular, almost entire segments is Grammitis denticulata Blume. Mount Apo, 1,800 m., Copeland 1102, 1103. Java. (15) P. inconspicuum Blume. Rhizome short-creeping, clothed with linear scales; fronds sessile or nearly so, 10 to 15 cm. high, 1 cm. broad, contracted toward the ends, pinnate; pinnae erecto-patent, entire, coriace- ous, glabrous or glabrescent; veinlets immersed, simple; sori costal. Davao, Warburg 14190. Java. (16) P. mi nut urn Blume. Stipes tufted, 4 to 7 cm. high, clothed with soft yellowish hairs; frond 10 to 15 cm. high, 2 cm. broad, narrowed toward the ends, pinnate; pinna close, erecto-patent, obtuse, crenate, papyraceo- herbaceous, clothed on both sides with soft yellowish hairs; veinlets simple, very short; sori costal, 1 to 3 on each side. Luzon, Steere. Ceylon, Malaya. (17) P. macrum Copeland. Rhizome short, erect, densely covered with roots, bases of dead stipes and brown scales; fronds crowded, on stipes 1 to 2.5 cm. long, the larger ones 25 cm. high, one-tenth as broad, narrowed toward both ends, curved, lax, pinnate; pinnae 1 to 2 mm. broad, rather acute, sinuate, decurrent, the upper ones confluent, the lower remote, sub- coriaceous, glabrous; veinlets simule; sori superficial, somewhat elongate, nearer the margin than the costa. Mount Apo, 1,650 m., epiphytic on mossy trunks, Copeland 1016. (18) P. subfalcatum Blume. Rhizome short, erect; stipes 1 to 2 cm. high, hairy; fronds about 15 cm. high, 2 to 3.5 cm. broad, narrowed toward 122 POLYPODIACEJB OF THE PHILIPPINE ISLANDS. both ends, pinnate; pinnae close, spreading, decurrent, sharply toothed, papyraceo-herbaceous, sparsely villose; veinlets simple; sori round, midway between the costa and margin. Luzon, Cuming 113, 205. Malaya. (19) P. celebicum Blume. Rhizome very short, clothed with linear brown scales ; stipes 4 to 8 cm. high, firm, erect, beset with short, cinnamon- colored hairs; frond 35 to 50 cm. high, 5 to 7 cm. broad, apex of mature frond rather abruptly contracted; pinnae linear, about 3 mm. broad, sepa- rated by their own width, acute, entire, coriaceous, glabrescent; rachis short-hairy; veinlets simple, inconspicuous; sori half immersed, oblong, near the margin and parallel to it. Mount Apo, 1,500 m., DeVore and Hoover 336, Copeland 1004, 1017. Sumatra to Celebes. (20) P. obliquatum Blume. Rhizome short, clothed with large lance- olate scales; stipe 2 to 4 cm. long, firm, spreading hirsute; frond 20 to 40 cm. long, about 6 cm. broad, pinnate; pinnae narrowed from broad bases to acuminate apices, horizontal or subfalcate, entire, coriaceous, glabrous; pinnules immersed, simple; sori immersed, the rim of the cavity almost roofing over the young ones, oblong, oblique to the costa, reaching almost from costa to margin. Mount Mariveles, Loher; Davao, Warburg 14173, Copeland 1018. India across Malaya. P. Schenkii Harrington, collected by Steere in Panay and by Loher in Benguet, does not seem to be distinct. (12) P. decorum Brack. Rhizome short, creeping, densely scaly; stipes 0 to 3 cm. high, firm, clothed with exceedingly short hairs or glabrescent; frond 10 to 25 cm. high, rather firm, broadly lanceolate, rather abruptly contracted to the ends, pinnate; pinnae close, erecto-patent or horizontal, obtuse or acute, coriaceous, glabrous; veinlets simple, invisible; sori immersed and when young almost roofed over, oblique, falling short of both costa and margin. Benguet, Topping 193; Arayat, Merrill; Mariveles, Copeland 214, Whit- ford 244. Ceylon to Hawaii. A small form on mount Mariveles has usually a single sorus in or near the apex of the pinna. (22) P. craterisorum Harrington, Journ. Linn. Soc. 16:31. Rhizome erect, clothed with brown lanceolate scales; stipes clustered, 1 to 4 cm. high, hirsute with brown hair, firm, erect; frond 20 to 30 cm. long, 4 to 6 cm. broad, oblong or oblong-oblanceolate, tapering above and below, pinnate; pinnae numerous, linear, about 25 mm. long and 4 mm. broad, obtuse, entire, broadened and more or less confluent at the base, passing below into the narrow lobed wing of the stipe; rachis pubescent, lamina glabrous, membranous; veinlets simple, falling short of the margin; sori confined to the upper part of the frond, immersed, oval, 5 to 10 in a row POLYPODIES — POLYPODIUM. 1 23 on each side of the costa, about midway between it and the margin; rim of cavity projecting but not overarching. Mount Majayjay, epiphytic on tree trunks, Steere. (23) P. subobliquatum Christ, Bull. Herb. Boiss. 6(1898) :197. Rhi- zome short-creeping, sparsely scaly; stipe 1 to 2 cm. high, beset with very short cinnamon-colored hairs; frond 10 to 15 cm. high, 2 cm. broad, oblong- lanceolate ; pinnae obtuse, alternate with broad bases, remote, reduced toward the ends of the frond, 2 mm. broad, coriacous, rufescent, glabrous; veinlets oblique, simple, inconspicuous; sori 4 to 6 on each side of costa, ovate, scarcely immersed, midway between costa and margin, rim of cavity plane, not at all crater i form. Mount Mariveles, 1,420 m., Loher. This fern must be rare, as our rich collections from its type locality contain no representative of the group without more or less crateriform rim around the sorus. (24) P. papillosum Blume. Rhizome wide-creeping, subscaly; stipes 8 to 20 cm. high, firm, erect, almost glabrous; frond 30 to 50 cm. long, 4 to 6 cm. broad, drooping, abruptly acuminate, pinnate, lower pinnae not reduced; pinnae close, horizontal, about 4 mm. broad, obtuse, serrate toward the apex, herbaceous, glabrous; veinlets evident, forked; sori nearer the margin than the costa, round, so immersed that they project, often more than 1 mm. from the upper surface. Luzon, Cuming 185; Nueva Vizcaya, Merrill 342; Sorsogon, Baranda; Davao, Copeland 972, 982, 1277. Malaya. (25) P. Leysii Baker, Journ. Bot. 17 (1879), p. 66. Sulu Archipelago, Burbidge. Description not available. § Goniophlebium. (26) P. nummularium Mett. Rhizome wide-creeping, slender, clothed with linear subulate, ferruginous scales; stipes scattered, of sterile frond short, of fertile 6 to 10 cm. high; fronds dimorphous, entire, the sterile suborbicular, scarcely 2 cm. long, the fertile 6 to 10 cm. long and narrowly linear, both coriaceous, glabrous; veins immersed, obscure, anastomosing to form a regular series of triangular and rhomboidal areolae; sori in a single series, round, superficial, but their position marked on the upper surface of the frond. Jala-Jala, Rizal, Meyen; Laguna, Cuming 121. (27) P. verrucosum Wall. Stipes 40 to 60 cm. high, glabrous, erect, terete; frond 30 to 120 cm. high, 30 cm. broad, pinnate; pinnae numerous, 15 to 20 cm. long, about 2 cm. broad, entire, coriaceous, glabrous or nearly so; veins forming several rows of areolse; sori confined to the costal areolae, immersed so as to form distinct papillae on the upper surface. Sorsogon and Bataan Island, Baranda; Davao, Warburg 14155. Malacca to northern Australia. P. (Goniophlebium) phlebodioides Copeland (ined.) is a still larger fern with the bases of the pinnae acute, and mostly three rows of areolae, differing from P. verrucosum in that the pinnae are broadly serrate. Mount Apo. 124 POLYPODIACEvE OF THE PHILIPPINE ISLANDS. (28) P. subauriculatum Blume. Khizome wide-creeping, bluish, clothed with broadly linear ferruginous scales; stipes 15 to 35 cm. high, firm, brown, shining, glabrous; frond 40 to 120 cm. long, about 25 cm. broad, firm, more or less horizontal, pinnate; pinnae 10 to 15 cm. long, one-tenth as broad, acute or acuminate, serrate toward the apex, rounded or auricled on the lower or both sides at the sessile base, herbaceous or subcoriaceous, glabrous; areolse a single row in the original description, but 2 or 3 rows in more recent descriptions and in most of our specimens; sori only in the costal areolse, immersed. Luzon, Cuming 244; Benguet, LoJier, Barnes 974; Mount Mariveles, Merrill 3208, Whitford 318, Copeland 1382. Himalayas to Samoa and New Caledonia. (29) P. molliculum Copeland. Rhizome wide-creeping, clothed with small, subulate, ferruginous scales; stipe about 10 cm. high, suberect, becoming glabrous; frond 15 to 20 cm. high, 8 cm. broad, pinnate; pinnae narrowly lanceolate, 6 to 8 cm. broad, acute, serrate, or crenate toward the base, short-auricled, more or less truncate, sessile but not adnate, herbaceous, clothed on both surfaces with a short soft tomentum; veins free beyond a single costal series of areolse ; sori scarcely immersed. Baguio, epiphytic on pines, Elmer 6505. § Phymatodes. (30) P. neglectum Blume. Rhizome slender, wide-creeping, clothed with grayish-ferruginous scales; stipes scattered, 1 to 2 cm. high, firm, glabrous; sterile fronds broadly ovate, 2 to 2.5 cm. high, 1.5 cm. broad, obtuse, rounded below, entire, coriaceous, glabrous; main veins very distinct almost to the edge, veinlets half evident; fertile frond lanceolate-ovate, obtuse at both ends, 3 to 3.5 cm. high; sori large, round, in a single row, superficial, in well-developed fronds about 5 sori in each row, reaching the entire length of the frond. Luzon, Meyen: Mount Marivel.es, on exposed ridges, Merrill 3244. Java. (31) P. rhynchophyllum Hooker. Rhizome firm, wide-creeping, with copious fibrillose bright-ferruginous scales; frond dimorphous, the sterile ones ovate, 3 to 4 cm. long, with stipes about the same length, fertile ones 8 to 15 cm. long, 15 mm. broad, narrowed very gradually upwards, obscurely toothed, on stipes 5 to 10 cm. long, coriaceous, glabrous; main veins distinct to the margin, with copious fine areolae between them, with free included veinlets; sori uniserial, confined to the upper half of the fertile fronds. Mount Mariveles, Loher. Upper India. (32) P. accede ns Blume. Rhizome wide-creeping, slender, sparsely clothed with linear-subulate, dull brown scales; stipes 2 to 10 mm. high, firm; fronds not very dimorphous, the sterile 2 to 4 cm. high, ovate, obtuse or subacute, rounded or subcuneate at the base, coriaceous, glabrous except for a few dark scales along the margin; veins invisible; fertile POLYPODIES — POLYPODIUM. 1 25 frond 3 to 8 cm. high, lower broad part sterile, upper part contracted and soriferous; sori rather large, round, in single rows, often confluent, and covering the apex of the frond. Luzon, Steere; Benguet, Elmer 6128; Arayat, Merrill 3817; Mount Mari- veles, Loher, Merrill 3225, 3750, Whitford 314; Mount Apo, DeVore and Hoover 325, Copeland; the Mount Apo plants are larger than those from Luzon. Malaya and Polynesia (33) P. hammatisorum Harrington, Journ. Linn. Soc. 16(1878) :32. Rhizome long and slender, clothed with membranous, long-lanceolate, light brown scales; stipes scattered, those of the sterile frond 1 to 4 cm. high, of the fertile 3 to 7 cm., slender, naked, erect; sterile frond elliptical, 1 to 4 cm. long, 6 to 25 mm. broad, obtuse, coarsely and shallowly crenate except at the tapering base; fertile frond linear, 5 to 12 cm. long, 4 mm. broad, with a lobe under each sorus, coriaceous, glabrous; midrib distinct, veins immersed; sori about 20 in a row on each side of the costa, nearly opposite, large, giving the fertile frond a knotted appearance. Mount Majayjay, on fallen timber, Steere. (34) P. Rudimentum Copeland. Rhizome wide-creeping, slender, cloth- ed with linear-subulate scales; stipes 15 to 25 mm. high, filiform, straight and erect, glabrous; frond orbicular-ovate, the fertile rather the narrower, 10 to 20 mm. long, rounded at both ends, entire or with fine incisions marking the place of teeth, coriaceous, very glabrous; costa disappearing below the apex, veins hidden, anastomosing irregularly or rarely free but hamate; sori few in a row on each side of the costa, nearer it than the margin, round, somewhat immersed. Bagnio, on wret boulders, Elmer 6022. (35) P. stenophyllum Blume. Rhizome moderately thick, wide-creep- ing, densely clothed with linear, pale brown scales; stipes 1 to 2 cm. high, firm, erect; fronds 10 to 12 cm. high, 1 cm. broad, rounded above, attenuate to the base, entire, coriaceous, glabrous; veins immersed, invisible, with few veinlets; sori in single rows near the margin, round, deeply immersed, and prominent from the upper side. Luzon, Cuming 122. Java to Celebes. (36) P. longifolium Mett. Rhizome short-creeping, woody, its scales linear, very dark; stipe about 2 cm. high, not distinct from frond; frond 30 to 40 cm. high, 10 to 20 mm. broad, subacute, entire and often revolute, attenuate to the base, coriaceous, glabrous or nearly so; veins invisible, areolae fine, with copious free veinlets; sori oblong, quite immersed, placed in a single row close and parallel to the margin, separated by more than their own length. Mount Atoc, 1,500 m., Loher; Paragua, Merrill 752. Malaya. (37) P. ten ui lore Kunze. Rhizome slender, scandent; frond 20 to 50 cm. high, at most 12 mm. broad, acuminate, entire, attenuate to the sessile or short-stipitate base, coriaceous, glabrous; main veins none, areolae fine, 126 POLYPODIACE^B OF THE PHILIPPINE ISLANDS. invisible; sori minute, copious, scattered, sometimes confluent, especially along the margin. Mindanao, Cuming 287; Catanduanes, Baranda; Benguet, Topping 262. (38) P. punctatum (L.) Christ. Rhizome short, stout, with sparse scales but usually covered with ' roots ; fronds sessile or nearly so, 30 to 60 cm. high, one-tenth as broad, oblanceolate, acute or obtuse, attenuate to the base, entire, subcoriaceous, glabrous; midrib prominent, veins fine, not immersed, with copious fine areola^ and free veinlets; sori small and copious, scattered irregularly. Baguio, Topping 314, Elmer 5884 (large sori) ; Mount Mariveles, Cope- land 253, 257 (broad), Whitford 197; Rizal, Merrill 2353; Mount Apo, Copeland 1194. Tropical Africa across Polynesia. (39) P. validum Copeland. Rhizome short, stout, clothed with ovate, obtuse, cordate or peltate, appressed, brown scales; fronds clustered, almost sessile, broadly oblanceolate, subacute, entire, attenuate to the base, thick- coriaceous, brittle, glabrous; main veins fine but not immersed, running almost to the margin, major areolae about 7 between costa and margin, each inclosing many fine minor ones; sori numerous, minute, irregularly scattered. Davao, on rocks along Sibulan River, Copeland 973, 1259. (40) P. oodes Kunze. Rhizome slender, clothed with small fibrillose, yellowish scales; stipes distant, slender, glabrous; frond 4 to 6 cm. long, 3 cm. broad, ovate, entire, with rounded but hardly decurrent base, coria- ceous, glabrous; main veins distinct nearly to the margin, with fine areolse and free veinlets; sori rather large, few, scattered. Philippines, Cuming 58; Mount Data, Benguet, Loher. (41) P. myriocarpum Mett. Rhizome stout, creeping, sparsely scaly; stipes subclustered, 1 to 2 cm. high; frond 40 to 60 cm. high, 3 to 6 cm. broad, acuminate, entire, attenuate to the base, papyraceous, glabrous or the lower surface pubescent; main veins distinct two-thirds of way to margin, where they are connected, forming a conspicuous row of large rhomboidal areol*, outside which is a row of smaller ones, both including numerous fine ones; sori numerous, minute, scattered irregularly. Benguet, Topping 346, Elmer 6142; Mariveles, Merrill 2549, Copeland 227, Whitford 50; Rizal and Tarlac, Loher; Mindoro, Merrill 1772. Cochin China, Malaya. (42) P. linguaeforme Mett. Rhizome stout, short-creeping; frond sessile, 20 to 50 cm. long, 7 cm. broad, narrowed from the middle to three-fourths of the way down, and then dilated again to the broadly rounded base, entire, papyraceous, glabrous; veins very distinctly raised, the main ones irregular, areolae subquadrangular, with an immersed sorus on free or jointed veinlets in the center of each. Castillo, Loher. Borneo, the Solomon Isles. (43) P. triquetrum Blume. Rhizome slender, creeping, clothed with brown or whitish, lanceolate, acuminate scales; stipes 3 to 12 cm. high, POLYPODIES — POLYPODIUM. 1 27 those of the fertile fronds the higher, straight or crooked, stramineous, glabrous; fronds somewhat dimorphous, the sterile 3 to 10 cm. long, lanceolate or ovate, obtuse or acute, entire, rounded or cuneate at the base, coriaceous, glabrous, the fertile frond usually longer and narrower; main veins conspicuous very nearly to the margin, areolse invisible; sori moderately large, in two rows between each two main veins, round, superficial. Including P. rupestre Blume, this species varies exceedingly in the size and shape of the fronds. Luzon, Cuming 245; Benguet, Loher, Topping 149; Arayat, Loher; Mount Mariveles, Barnes 346, Whitford 126, Copeland 1391. Malaya and Polynesia. (44) P. membranaceum Don. Rhizome stout, clothed with ovate, membranaceous scales; stipe short, winged, erect, firm; frond 30 to 50 cm. high, about 8 cm. broad, narrowed gradually toward both ends, repand or entire, very thin; main veins distinct, with very copious fine areolae with free veinlets; sori mostly in two rather irregular rows near the main veins. Philippines, fide Baker, Ann. of Bot. 5:477; Baguio, Elmer 5873, Topping 226, 263. Ceylon to west China. (45) P. Zippelii Blume. Rhizome creeping, clothed with thin, lance- olate, squarrose, brown scales; stipes short and stout; fronds about 30 cm. high, 4 to 5 cm. broad, acute, decurrent below, entire or nearly so, submembranaceous, glabrous; venation very evident; sori mostly in rows along the main veins. Philippines, Steere; Sorsogon and Masbate, Baranda. Java. As originally described this species is very doubtfully distinct from the preceding. (46) P. heterocarpum Blume. Rhizome wide-creeping, clothed with squarrose, linear, dull brown scales; stipes 30 cm. or more high, angular, winged above ; frond 30 cm. or more long, oblong-lanceolate, subacute, attenuate below, repand, thin but firm, glabrous; main veins distinct, areola? rather ample; sori more or less in rows parallel to the main veins, irregular in shape. Benguet and Rizal, Loher; Davao, Copeland 96*2, 965, 1251. India to Borneo. (47) P. hemionitideum Wall. Rhizome woody, hypogaeous ; stipe about 10 cm. high, firm, erect; frond 20 to 50 cm. high, 10 cm. or less broad, narrowed to both ends, entire, subcoriaceous, glabrous; veins very evident, main ones not quite reaching the margin, areolae rather large; sori large, irregularly arranged. Isabela, Luzon, Warburg 11603, 11621; Mariveles, Warburg 11527. India and south China. (48) P. musaefolium Blume. Rhizome woody, with ovate, dull brown scales; stipe about 1 cm. high, very stout; frond over 1 m. high, 15 cm. broad, oblanceolate, obtuse, nearly entire, broad to the base, coriaceous, 128 POLYPODIACEJK OF THE PHILIPPINE ISLANDS. glabrous; venation evident, main veins running very nearly to the margin, with regular arched cross veins; sori small, in rows parallel to the cross veins and scattered. Davao, epiphytic forming poor nests, Copeland 1295. Malaya. (49) P. anomalum Christ, Bull. Herb. Boiss. 6(1898) :201. Rhizome creeping, clothed with ovate-subulate, crisped, brown scales; stipe 3 to 4 cm. high, stramineous, glabrous; frond 20 cm. high, 15 cm. broad, irregular in form, attenuate below, undulate-crenate, or pinnatifid into lobes of irregular form 3 cm. long, the apex of the frond irregularly dentate, membranous, pale green, especially below, glabrous; main veins distinct, areolse about 4 series along the costa, large; sori large, round, irregularly pluriseriate. Mount Data, 2,250 m., Loher. (50) P. pentaphyllum Baker, Ann. of Bot. 5(1891) :478. Rhizome wide-creeping, woody, 3 mm. in diameter, sparsely clothed with small laceolate-acuminate palese; stipe naked, 2 to 3 cm. high; frond 30 cm. or more high, simple in the lower half, forming a mere wing to the rachis, deeply pinnatifid in the middle into distant, linear-lanceolate lobes 1 cm. broad, membranous, green glabrous; veins fine, copious; sori minute, scattered. Philippines, Wallis; Castillo, .Arayat, and Los Bafios, Loher. (51) P. insigne Blume. Rhizome slender, dull brown; stipe 10 to 15 cm. high, often winged throughout, glabrous; frond 10 to 20 cm. high, two-thirds as broad, with an entire, acute, lanceolate terminal lobe one- third the height of the frond and 15 mm. broad, and 2 to 4 similar lobes on each side, separated to within 1 cm. of the rachis, firm-herbaceous, glabrous; venation fine, irregular, visible; sori small, irregularly scattered. Luzon, Cuming 52, Brackenridge. Malaya. (52) P. pteropus Blume. Rhizome wide-creeping, bearing blackish, lanceolate-subulate scales; stipe 10 to 15 cm. high, naked or as a rule scaly; frond 10 to 20 cm. high, up to 5 cm. broad, rarely simple, usually ternate or pinnatifid, with a large, broad, acute, repand terminal lobe and similar but smaller lateral ones, thin but firm, dark green, glabrous; main veins falling short of the margin, as in P. punctatum; sori small, scattered. Samar, Cuming 324. India and Malaya to Formosa. (53) P. incurvatum Blume. Rhizome creeping, clothed with ovate, whitish, membranous, appressed scales; stipe of sterile frond 10 to 15 cm. high, of fertile 20 to 40 cm. high, erect, firm, glabrous; fronds simple, ternate or pinnatifid, or the fertile even pinnate; the sterile 10 to 20 cm. long, mostly broadly triangular, the lobes broad, entire or repand, acute, coriaceous, glabrous; fertile frond larger, with acuminate lobes about 1 cm. broad; main veins reaching the margin, veinlets invisible; sori large, round, one in each areola, in a single row between midrib and margin, partly immersed. POLYPODIES — POLYPODIUM. 129 Davao, Warburg 14162, Copeland 1063; different from typical plants in that the sori are not entirely immersed. Java. (54) P. trifidum Don. Rhizome stout, creeping, clothed with large, lanceolate, squarrose, ferruginous scales; stipe 8 to 20 cm. high, erect, firm, polished; frond 10 to 15 cm. high, most frequently trifid, the segments 10 to 15 cm. long, one-tenth as broad, or the sterile rather broader, acuminate, entire or repand, coriaceous, glabrous, green on both sides; main veins conspicuous to the margin, veinlets obscure; sori in single series, rather nearer the midrib than the margin, one between each two main veins. Benguet, Loher, Elmer 5815; Arayat, Merrill 3812; Mount Mariveles, Loher, Copeland 219, Whitford 142. Ceylon to Japan. This is very probably only an undeveloped state of P. palmatum. (55) P. glaucum Kunze. Rhizome creeping, stout, clothed with acic- ular, stiff, purplish brown palese 1 cm. or more long; stipe 15 to 20 cm. high, erect, firm, polished; frond 20 to 30 cm. high, 15 to 20 cm. broad, pinnatifid to within 5 mm. of the rachis into erecto-patent, acute, entire segments 10 cm. long and 7 mm. broad, or the sterile rather broader, coriaceous, glabrous, the under side with a blue bloom; no main veins, veinlets visible from the upper but not from the lower side; sori superficial, round, in single rows near the midribs. Luzon, Cuming; Mount Mariveles, Whitford 147, Copeland 1392; epi- phytic on high ridges. (56) P. affine Blume. Rhizome woody, scaleless; stipe 30 to 45 cm. high, firm, glossy; frond 60 to 120 cm. long, 30 cm. or more broad, cut down nearly to the rachis below, within 1 cm. of it above, into erecto- patent, slightly repand, very acuminate lobes, 15 to 25 cm. long, about 25 mm. broad, papyraceous, glabrous; no main veins, areolae large; sori superficial, in 2 to 3 irregular rows. Luzon, Cuming 97; Sorsogon and Albay, Baranda. Malaya. (57) P. Phymatodes L. Rhizome wide-creeping, stout, bearing sparse deciduous fibrillose scales, becoming glabrous except for very few appressed ovate black palese; stipes 10 to 20 cm. high, erect, firm, polished, brown; frond exceedingly various, sometimes simple, lanceolate or oblong, acute or obtuse, entire or nearly so, 10 to 20 cm. long; usually pinnatifid into segments similar to the simple form, the sinuses reaching to about 1 cm. from the rachis, usually rounded, coriaceous, glabrous; main veins none or very fine and not nearing the margin; sori large, round, immersed, in single or double rows or scattered; epiphytic. Luzon, Cuming 27, 201; Mariveles and Manila, Loher; Tayabas, Merrill 3353; Mindoro, Merrill 1780; Gimogon River, Negros, Copeland 77; Davao, Warburg 14113, Copeland 310, 657. Africa across Polynesia. 24036 9 130 POLYPODIACFJE OF THE PHILIPPINE 1SLAXES. (58) P. nigrescens Blume. Rhizome short, very thick, the ovate scales usually concealed by roots; stipe 10 to 50 cm. high, firm, glabrous, straight; frond rarely simple or ternate, usually pinnatifid to about 7 mm. from the rachis into few or many broadly linear segments, which are acuminate, entire or repand, 20 to 30 cm. long, 2 cm. or more broad, herbaceous, glabrous, dark green; main veins fine, indirect, falling short of margin. included free veinlets copious; sori round, deeply immersed, in single rows nearer the midrib than the margin. Benguet, Topping 339; Mount Mariveles, Copeland 1404; Rizal and Laguna, Loher; Tayabas, Warburg 12756; Sorsogon, Albay, and Camarines, Baranda; Davao, Copeland 690, 964. India across Polynesia. (59) P. longissimum Blume. Rhizome very stout, clothed with large, ovate, deciduous scales; stipe stout, 30 to 60 cm. high, polished, stra- mineous; frond 40 to 100 cm. high, 25 to 35 cm. broad, pinnatifid to the narrowly winged rachis into linear erecto-patent, acuminate, entire or repand segments usually not more than 1 cm. broad, subcoriaceus, glabrous ; venation inconspicuous; sori deeply immersed, round, in single rows rather nearer the midrib than the margin. Rizal, Merrill 1356, 2267; south Luzon, Baranda; Basilan, DeVore and Hoover 24 ( ?). India to Java and Formosa. (60) P. palmatum Blume. Rhizome creeping, densely clothed with large, spreading, lanceolate-subulate ferruginous paleae; stipe 15 to 30 cm. high, firm, glabrous; frond 15 to 35 cm. high, 15 to 30 cm. broad, pinnatifid very nearly to the rachis or pinnate; pinnae 10 to 15 cm. long, 1 cm. more or less broad, broadest in the middle, acuminate, entire or subcrenate, cuneate-decurrent at the base, coriaceous, glabrous; main veins conspicuous, veinlets obscure; sori round, in slight depressions, in single rows, one sorus between each two main veins. Luzon, Cuming, Steere; Benguet, Arayat, and Mount Mariveles, Loher; Benguet, Topping 189, 292; Mount Mariveles, Merrill 3235, Copeland; Davao, Warburg 14154, DeVore and Hoover 328, Copeland 1062; Jolo Archipelago, Burbidge. Malaya. (61) P. angustatum Blume. Rhizome stout, creeping, clothed with very large, ovate-lanceolate paleae, brown with scarious margins; stipe 30 cm. high, firm, erect, glabrous; frond 35 to 45 cm. high, pinnate; pinnae 15 to 20 cm. long, 2 to 3 cm. broad erecto-patent, acuminate obscurely serrate, the lower ones sessile, the upper broadly adnate to the rachis, coriaceous, glabrous; main veins conspicuous, veinlets obscure; sori large, round, superficial, in single rows, one sorus between each two main veins. Mount Apo, DeVore and Hoover 330, 341, 376, Copeland. Java and Celebes. This species is united with P. palmatum in Synopsis Filicum and by Christ; but the two Philippine species, each agreeing perfectly with the figure and description of Blume, differ in the size and position of the sori, POLYPODIES — POLYPODIUM. 131 shape, and margin of the pinna? and their freedom from the rachis, and size of the palese. (62) P. albido-squamatum Blume. Rhizome stout, wide-creeping, clothed with reddish or gray-brown palese which are ovate at the base and long-subulate; stipe 15 to 40 cm. high, erect, polished; frond 30 to 60 cm. high, about 30 cm. broad, pinnate; pinnae erecto-patent, linear or lanceolate, very acuminate, entire or nearly so, coriaceous, glabrous, the lower stalked, the upper sessile; main veins visible but not conspicuous, veinlets ending under submarginal lime-spots; sori in single rows, usually nearer the midrib than the margin. Philippine specimens are mostly narrower than the type, belonging in P. varians Blume, which is not a distinct species. Luzon, Cuming 202, 236; Mounts Arayat and Mariveles, Loher; Benguet, Topping 150, 215, 202, Elmer 6263; Mount Mariveles, Copeland; Jolo Archipelago, Burbidge. Malaya. (63) P. lagunense Christ, Bull. Herb. Boiss. 6(1898):201 cum Icone. Rhizome wide-creeping, solid, clothed with ovate-subulate, umbonate, reddish- brown appressed scales; stipe 10 to 15 cm. high, firm, glabrous; frond 15 to 20 cm. high, 10 to 15 cm. broad, pinnate, dimorphous; pinnae of the sterile frond 6 or 7 on each side, remote, oval, 4 cm. long, 2 cm. broad, acuminate, subcrenate, sessile or short-stalked, coriaceous, glabrous; pinna? of fertile frond linear-lanceolate, caudate, erecto-patent, 12 cm. long, 4 to 10 mm. broad, crenate; costa prominent, veins inconspicuous, veinlets hidden; sori large, round, immersed, in single rows, one sorus between each two main veins, midway between costa and margin. Los Baiios, Laguna, Loher. § Selliguea. (64) P. Selliguea Mett. (Gymnogramme membranacea Hooker). Rhi- zome wide-creeping, clothed with small, linear, nearly black scales; stipe 5 to 15 cm. high, nearly naked; frond 15 to 30 cm. high, 2 to 4 cm. broad, very acuminate entire, attenuate below and decurrent, papyraceo-herba- ceous, glabrous ; main veins distinct to the margin but zigzag and very slender, united by similar transverse veinlets to form large hexangular areolae; sori in oblique interrupted lines, one line between each two main veins. Samar, Cuming 325, 334. Malaya. (65) P. macrophyllum Mett. Rhizome creeping, clothed with small, dark, lanceolate scales; stipe 2 to 3 cm. high, firm, scaly; frond 30 to 60 cm. high, 6 to 8 cm. broad, narrowed gradually toward both ends, entire or repand, papyraceous, glabrous; main veins conspicuous, not straight, areolse rather quadrangular, free veinlets evident; sori in single continuous or interrupted rows between the main veins. Bohol, Cuming 351; Rizal, Loher; Benguet, Barnes 967. Malava. 132 POLYPODIACEJE OF THE PHILIPPINE ISLANDS. (66) P. caudiforme Blurae. Rhizome wide-creeping, clothed with ovate- lanceolate, scarious-ferruginous scales; stipe 10 to 20 cm. high, firm, glabrous; frond 10 to 20 cm. high, the fertile lanceolate, the sterile ovate, long-acuminate, entire or crenate, rounded or acute at the base, coriaceous, glabrous; main veins conspicuous, reaching the margin, veinlets invisible; sori large, globose or elongate, as wide as the space between the main veins, rarely confluent; epiphytic. Mount Apo, 1,800 m., Copeland, 1055, 1106. Malaya and Polynesia. (67) P. vulcanicum Blume. Rhizome creeping, clothed with ovate, brown scales; stipe of the sterile frond 3 to 8 cm. high, of the fertile 8 to 20 cm., rigid, glabrous; sterile frond 3.5 to 6 cm. high, ovate, obtuse, rounded below, entire, coriaceous, glabrous; fertile frond 5 to 12 cm. high, ovate-lanceolate, obtuse, acute at base ; main veins conspicuous, falling short of margin, or barely reaching it, veinlets invisible; sori globose, mostly confluent in rows from the costa to the margin, so large that they touch across the main veins; terrestrial. Mount Apo, above 2,100 m., DeVore and Hoover 337, Copeland 1048. Sunda to Celebes, highest mountains. •(68) P. Elmeri Copeland. Rhizome creeping, stout, clothed with ovate, acuminate scales 6 mm. long, with peltate, black- centered bases; stipes stout, dark, glabrous, that of the sterile frond 3 to 6 cm. high, of the fertile 15 to 20 cm.; sterile frond ovate-triangular, about 10 cm. high, 6 to 8 cm. broad, obtuse, entire or subrepand, abruptly truncate at base, glabrous, very rigidly coriaceous; main veins conspicuous, reaching the margin, veinlets invisible; fertile frond 10 cm. high, 4 cm. broad, acute, subentire, cuneate at base, coriaceous; sori uninterrupted, reaching from the costa to the margin, not quite filling the space between the main veins; epiphytic. Mount Santo Tomas, Benguet, Elmer 6547. (69) P. ellipticum Thunberg. Rhizome creeping, woody, bearing small, lanceolate, brown scales; stipe 30 to 60 cm. high, firm, naked; frond 30 to 50 cm. high, 15 to 30 cm. broad, pinnate below, rachis winged above; pinnae or segments 7 to 11 on each side, about 20 cm. long, linear-lanceolate, acute, entire, herbaceous, glabrous; venation conspicuous, main veins zigzag, not reaching the margin, areolse large, irregular, mostly with single free veinlets; sori linear, oblique, touching the midrib but not the margin; terrestrial. Includes Selliguea pothifolia J. Sm. Luzon, Cuming 53; Benguet, Elmer 5876, Barnes 963; Rizal, Loher ; Mount Mariveles, Loher, Merrill 3116, Copeland 220; Catanduanes, Bar- anda; Samar, Cuming; Davao, Copeland 1256. India to Japan and Queensland. § Myrmecophila. (70) P. sinuosum Wallich. Rhizome wide-creeping, tubular, 1 to 3 cm. in diameter, covered with roundish peltate scales with black center and scarious margin; stipes brown, erect, glabrous, of sterile frond about 4 cm. high, of fertile about 6 cm.; sterile frond about 10 cm. high, 1.5 to POLYPODIES — POLYPODIUM. 133 2 cm. broad, obtuse, base subacute, entire, subcoriaceous, glabrous; fertile frond about 20 cm. high, 1.5 to 2 cm. broad, subacute, acute at base, subcrenate; veins hidden, main veins not reaching margin; sori large, round, immersed, in single rows nearer the margin than the costa. Tayabas, Merrill 3355; Negros, Copeland 101. (71) P. lomarioides Kunze. Rhizome forming a thick, wide-spreading crust, thickly clothed with small, peltate scales which are ferruginous in the center, with a scarious border; stipe about 10 mm. high, erect; frond 30 to 50 cm. high, 10 to 15 cm. broad, the sterile pinnatifid into close, horizontal, oblong, entire, obtuse lobes 2 cm. broad, the fertile cut nearly to the rachis throughout into more numerous lobes, hardly 1 cm. broad, coriaceous, glabrous; veins hidden, irregular; sori round or oblong, completely immersed, in single rows near the midrib. Luzon, Cuming 242 ( ? ) . Malaya to Formosa. § Drynariopsis. (72) P. heracleum Kunze. Rhizome very stout, clothed with long, fibrillose, light-brown scales; fronds seriate, 100 to 350 cm. long, 60 to 100 cm.; broad, the base reduced to a broad rigid wing, 15 cm. broad, weak in chlorophyll, the upper part cut down nearly to the rachis into acute entire lobes 50 cm. long, 10 cm. broad, rigidly coriaceous, glabrous; main veins distinct to the margin, with about eight series of large areolse inclosing numerous small ones with free veinlets; sori small, numerous, scattered, slightly immersed. Sorsogon and Catanduanes, Baranda; Mindoro, Merrill 1800. Java, Celebes. (73) P. meyenianum Schott. Rhizome very stout, densely beset with long, linear, crisped, ferruginous scales; frond 60 to 100 cm. high, the basal part about 15 cm. broad, shallowly lobed, rigid, brown; the sterile vegetative region 40 to 60 cm. high, 20 to 30 cm. broad, pinnatifid almost to the rachis into erecto-patent obtuse, entire lobes 2 to 3 cm. broad, coriaceous, glabrous; main veins reaching the margin, between them four or five series of rather regular major areola, each including about eight rectangular minor ones; apical fertile part about 30 cm. high, pinnate, the pinnae sinuous, narrowly linear, about 20 cm. long, lobed to the midrib into roundish segments, each covered by a single sorus. Luzon, Cuming 49; Mount Mariveles, Merrill 3224, Whitford 221, Cope- land 1386, on lofty ridges. (55) LECANOPTERIS Blume. Rhizome creeping, inflated, cavernous and inhabited by ants; fronds on conical cavernous outgrowths of the rhizome, pinnatifid or pinnate; veins anastomosing with free included veinlets; sori on reflexed marginal out- growths of the fronds, facing upward. Epiphytic, usually in the tops of lofty trees. Closely related to some species of Polypodium. (1) L. carnosa Blume. Rhizome and phyllophores forming a thick close covering over the host, glabrous on the outside; stipes about 5 134 POLYPODIACFJE OF THE PHILIPPINE ISLANDS. cm. high, glabrous; fronds 20 to 30 cm. high, about 5 cm. broad, rachis winged throughout; segments broadly or narrowly ovate, acute, contracted at base, margin shallowly lobed by the soriferous projections, coriaceous, glabrous; veins inconspicuous. Leyte, Cuming 312; Mount Mar i veles, Whit ford 334. Malaya. (2) L. pumila Blume, Flora Javae T. 2, Tab. 94. Rhizome as in the preceding; stipe about 10 cm. high, glabrous; frond 20 to 30 cm. high, about 7 cm. broad, rachis winged throughout; segments lanceolate, obtuse, hardly contracted at the base, lobed by the soriferous projections, firm but pellucid; veins conspicuous. Blume's figure of this species (and of the preceding as well) is unaccompanied by any description; the most conspicuous difference between them seems to me to be in the form and apex of the segments, and I have used his names for my plants on the assumption that that difference is diagnostic. The difference in texture would be less easily figured. Davao, Copeland 1299. Java. (56) PHOTINOPTERIS J. Sm. Rhizome creeping; frond pinnate, the lower pinnae sterile, each subtended by a stipule-like outgrowth, the upper fertile, very narrow, all articulate to the rachis; veins anastomosing, with free included veinlets in all directions; sori occupying the entire under side of the fertile pinnae. Epiphytic. The sterile plants are readily recognizable by the auricles subtending the pinnae. (1) P. speciosa (Bl.) J. Sm. Rhizome bluish, clothed with dirty- brown fibrjllose scales; stipe hardly 1 cm. high, glabrous arid brown, like the rachis; sterile pinnae 10 to 15 cm. long, half as broad, ovate, abruptly acuminate, subcuneate at the base, entire, coriaceous, glabrous; main veins and cross-veinlets forming large areolae evident, veinlets forming smaller areolae inconspicuous; fertile pinnae 10 to 15 cm. long, 3 mm. broad, deciduous. A form with a single fertile pinnae was named P. simplex J. Sm. Luzon, Cuming 64; Arayat, 800 m., Loher; Mindoro, Cuming 362; Davao, Copeland 649. Malaya. (57) DRYOSTACHYUM J. Sm. Rhizome stout, creeping, scaly; fronds pinnatifid, the segments articulate to the rachis; venation evident, with major, divided into minor areolae, with free included veinlets; sori only on the contracted upper part of the frond, coalescing so that each major areola includes a single cushion of sporangia. Epiphytic, with large, conspicuous fronds, more or less clustered into nests. Intimately related to Drynaria. (1) D. splendens J. Sm. Fronds sessile, the lower part brown, rigid, collecting humus into which the roots run, as the cup-leaves of Drynaria do, shallowly lobed, about 20 cm. broad and more than as high; above this a narrower part, about 40 cm. high and less than 10 cm. broad, POLYPODIES — DRYOSTACHYUM. 1 35 sinuate-lobed; above this 50 cm. or more of the sterile region, pinnatifid within 1 cm. of the rachis into erecto-patent segments about 25 cm. long and 4 cm. broad; finally the fertile apex, more than 30 cm. high, cut to the rachis into segments 10 to 20 cm. long, about 1 cm. broad, separated by twice their own breadth; sori occupying the entire dorsal surface except the midrib and main veins running to the margin. Luzon, Cuming 87; Benguet, Topping 245; Davao, Copeland 1285. Malacca to New Guinea. (58) DRYNARIA Bory. Rhizome very stout, scaly, creeping; fronds of two kinds, (a) cup-leaves, brown, rigid, like sessile oak leaves, and (6) ordinary leaves, large, green, pinnatifid, with segments deciduous from the racKis, of pinnate; veins anastomosing copiously, with free included veinlets in all directions. Large, conspicuous epiphytes. The cup-leaves collect quantities of detritus, form- ing a soil into which the roots grow. (1) D. quercifolia (L.) Bory. Scales of the rhizome about 1 cm. long, brown, narrowly lanceolate, from a cordate base; cup-leaves 20 to 30 cm. long, 15 to 20 cm. broad, shallowly lobed below, deeply toward the apex; normal fronds on petioles sometimes 35 cm. long, winged nearly or quite to the base; frond 60 to 100 cm. long, about 30 cm. broad, pinnatifid as a rule to about 5 mm. from the rachis, into segments 10 to 15 mm. broad; sori in regular rows, one row on each side of each main vein running to the margin. Luzon, Cuming 25, 273, 414; Nueva Viscaya, Merrill 311; Benguet, Topping 174, 344; Mount Mariveles, Whitford 372; Sorsogon, Catanduanes, Bataan, and Masbate, Baranda; Culion, Merrill; Capiz, Panay, Copeland 70; Guimaras, Ritchie, Forestry Bureau, 36; Cebu, Barrow 21; Davao, DeVore and Hoover 161, Copeland 1321. India to Melanesia and Queensland. (2) D. Linnaei Bory. Scales of the rhizome broadly ovate with peltate base; cup-leaves bluntly lobed; normal fronds 60 to 100 cm. long, 15 to 30 cm. broad, long stalked, cut down nearly to the rachis into entire, erecto-patent lanceolate lobes, rigid, glabrous; sori small and scattered. Cagayan, Luzon, Warburg 12209, 12210; Davao, Warburg 14141. Ceylon to Polynesia and Queensland. (3) D. rigidula (Sw.) J. Sm. Rhizome creeping, intertwined, clothed with ferrugineous, black-centred, long- pointed scales; cup-leaves sessile, deeply cordate, oblong, narrowed upward, 15 to 25 cm. long, sinuate near the base, deeply lobed toward the apex; normal leaves pinnate, 50 to 100 cm. or more long; pinnae 10 to 25 cm. long, broadly linear, acuminate, unequal -sided at base, on short, winged petiolules, very readily cast, serrate, glabrous, hard; fertile pinnae usually narrower than the sterile, with a single row of round, immersed sori along each side of the costa. A tree- top fern, forming large nests. Philippines, Cuming 248, 263; Mindanao, Copeland 1644. Malacca to Polynesia and Australia. VIII. ACKOSTICHE^. Fronds articulate to the rhizome or not so, simple, dichotomous, or pinnate, when pinnate the pinnae equal-sided; sterile and fertile fronds or parts of fronds distinct but not usually very different; sporangia covering the fertile surface, without being collected into sori; indusia therefore wanting. 1. Fronds pinnate, or the primary venation so. 2. Fronds simple — - (59) Elaphoglossum 2. Fronds pinnate .... (60) Achrostichum 1. Fronds or main veins dichotomous. 2. Stipe present, not articulate (61) Cheiropleuria 2. Fronds sessile, articulate to rhizome J (62) Platycerium (59) ELAPHOGLOSSUM Schott. Rhizome in our species creeping; fronds simple, entire, firm in texture, the fertile and sterile not exceedingly different, clothed with broad, ornate scales or glabrous; veins free unless at the margin; sporangia densely covering the lower surface. A large genus in tropical America, sparingly represented in the Old World. Our species are epiphytes of rather small size. 1. Margin cartilaginous, not ciliate (1) E. conforme 1. Margin ciliate. 2. Surface glabrous (2) E. decurrens 2. Surface somewhat scaly (3) E. Cumingii E. latifolium (Sw.) J. Sm. was reported by Harrington from Steere's collection from Luzon: the species is usually regarded as exclusively Ameri- can, and this determination was probably not quite accurate, or the specimen may have been ascribed to the wrong region, as Steere collected in tropical America. (1) E. conforme (Sw.) Schott. Rhizome woody, creeping or scandent, clothed with large ovate, membranous paleae 5 mm. long; stipes 5 to 15 cm. high, firm, erect, stramineous, glabrescent; frond 15 to 25 cm. high, 1.5 to 3 cm. broad, obtuse, cuneate at the base, entire and cartilaginous at the margin, coriaceous, glabrous; veins mostly once forked. Benguet and Arayat, Loher; Mount Mariveles, 1,200 m., Merrill 3250, Copeland 1384. Pantropic. Achrostichum ophioglossoides Mett. is a small thick-leaved form collected at Manila by Meyen. 136 ACHROSTICHE^ — ELAPHOGLOSSUM. 1 37 (2) E. decurrens (Desv.). Rhizome woody, the palese large, ovate, dull brown; stipe 6 to 10 cm. high, firm, erect, scaly; frond 10 to 15 cm. high, 5 cm. broad, round at the apex, narrowed gradually to the stipe, very thick, surface glabrous, but the margin densely fringed with ovate, yellowish, toothed, deciduous scales 1 mm. long; veins immersed, nearly hidden. Luzon, Cuming 144. (3) E. Cumingii (Fee). Rhizome woody, clothed with large, ovate, dull brown scales; stipe 15 to 20 cm. high, firm, erect, scaly below; sterile frond 20 cm. high, 3 cm. broad, obtuse, narrowed gradually below, margin densely fringed by mostly slightly intramarginal minute scales; frond very thick, surfaces, especially the upper, clothed with minute, scattered scales; veins quite hidden; fertile frond as long as the sterile but rather narrower. Luzon, Cuming 193; Arayat, Loher. (60) ACHROSTICHUM Linnaeus. Rhizome thick, erect, stipes not articulate to it; frond large, simply pinnate; pinnae with prominent costa, and veinlets copiously anastomosing, without free included veinlets; sporangia covering the backs of the fertile pinnae, except for the costa and sometimes for a narrow marginal line. Large terrestrial ferns, in brackish marshes throughout the Islands. The genus Achrostichum formerly included all ferns with the sporangia covering the fruiting surface, without evident differentiation of sori; which was probably more convenient than the present, presumably more natural, arrangement. (1) A. aureum L. Rhizome woody, somewhat scaly; stipe 30 to 60 cm. high, stout, erect, polished; frond 60 to 200 cm. high, 30 to 60 cm. broad; pinnae numerous, 15 to 30 cm. long, about 5 cm. broad, stalked, obtuse or sometimes retuse and bluntly mucronate, entire, glabrous, leathery; areolae small, evident; upper pinnae fertile, hardly as large as the sterile. Manila, Loher, Marave, Merrill 57, Elmer 5510; Camarines, Bataan, and Masbate, Baranda; Iloilo, Copcland, including a freak with forked pinnae; Davao, Warburg; Balabac, Steere. Pantropic. (61) CHEIROPLEURIA Presl. Rhizome creeping, stipes not articulate to it; fronds dimorphous, the sterile dichotomously veined and lobed, fertile linear, costate; sori covering the lower surface, excepting costa and margin. A- fern remarkably distinct in appearance, epiphytic or terrestrial in the mossy forest. (1) C. bicuspis Presl. Rhizome short, stout, densely clothed with golden, jointed, hairs; stipes 20 to 40 cm. high, angular, stramineous, naked except at the base; sterile frond about 10 cm. long, ovate or, if the tips spread, as broad as long, normally lobed half way to the base by a broad sinus into two erect or spreading acute lobes, entire, subcuneate at base, glabrous, thin-coriaceous; main veins dichotomous; veinlets anas- 138 POLYPODIACEJS OF THE PHILIPPINE ISLANDS. tomosing, with copious branched included veinlets; fertile frond about 15 cm. long, 1 cm. broad. Tonglon and Arayat, Loher; Baguio, Topping 153, Elmer 5844; Mount Mariveles, Copeland, Whit ford 331. Java to Formosa and New Guinea. (62) PLATYCERIUM Desvaux. Fronds articulate into a depression in the short rhizome, remarkably dimorphous; "basal fronds," reniform in general form, sessile, closely applied to the substratum, imbricate, sheltering the roots; and "normal fronds," standing oul from the substratum, dichotomously branched, fertile in definite parts; pubescence stellate; main veins dichotomous, veinlets anastomosing, with free included veinlets, the mesh especially fine under the fertile surface. A most natural genus of tropical epiphytes, whose extraordinary appearance has made them universal favorites in cultivation. (1) P. grande J. Sm. Basal frond very large, suborbicular, convex, or the upper ones erect, deeply laciniate with spreading or inflexed divisions; normal frond 1 to 2 m. long, pendent, in pairs, each with a single fertile region on the broadly cuneate base, to which the two repeatedly dichotomous appendages are attached; glabrous. Luzon, Cuming 157 (fide J. Sm.) ; Albay, Ticao, and Masbate, Baranda; Davao, Loher. Singapore to north Australia. (2) P. biforme (Sw.) Blume. Basal fronds imbricate, very thick especially toward the base, margin irregularly lobed; normal fronds 1.5 to 5 m. long, repeatedly dichotomous from a small subcuneate base, the .sterile division 2 to 3 cm. broad, continually forking, the fertile distinct, stalked, reniform, entire, 15 to 20 cm. broad. (See frontispiece.) Luzon, Cuming 156; Albay, Ticao, and Masbate, Baranda; Davao, Warburg 14147. South India across Malaya. INDEX TO GENERA AND SUBGENERA. Achrostichum Adiantum Allantodia [Names of subgenera Page. 137 92 71 108 are given in italics.] Loxogramme Meniscium Microlepia Page. 68 32 55 33 Monogramme MyrmecophiJa 106 132 78 A'rthropteris Aspidium Asplenium Athyrium 45 33 76 87 89 18 46 112 97 56 48 Nephrolepis Niphobolus Nothochlaena Odontosoria Callipteris Cheilanthes Cheiropleuria Christopteris 69 95 137 Ill 66 Onychium 98 Paesia Photinopteris Phymatodes Plagiogyria Pleocnemia Platycerium 105 134 124 97 34 138 39 16 Darea Davallia Dennstaedtia Diacalpe 86 52 57 14 15 Diplazium Dipteris Doryopteris Drymoglossum Drynaria 71 44 94 112 135 133 Polypodium Polystichum 115 16 52 104 Pteris 98 Platytaenia Ill Dryostachyum Elaphoglossum Goniophlebium Goniopteris Gymnopteris Hemionitis Histiopteris Humata Hymenolepis 134 136 123 20 41 67 104 49 110 Saccoloma Sagenia 52 33 58 Selliguea 131 88 48 Synaphlebium Syngramme Taenitis Tectaria Triphlebia 60 69 Ill 34 87 95 19 Lecanopteris 133 Vittaria Wibelia 107 55 91 Leucostegia Lindsaya Lomaria 50 59 89 II. NEW SPECIES OF EDIBLE PHILIPPINE FUNGI. By EDWIN BINGHAM COPELAXD, Ph. D., Botanist. It is still true of the Philippine Archipelago, as until within a decade it was of the entire Orient from Ceylon to Japan and Aus- tralia, that its fungus flora is a practically untouched field. From the little work in it that has been possible for us, it appears that our Agaricacece, at least, are almost entirely new to science as well as locally unknown. It can also be safely said, contrary to a rather prevalent opinion of the condition in tropical countries, that our Basidiomycete flora is a very rich one, in species if not in individuals. As to their edible properties, the writer has personally tested more than 100 Philippine species, and can state with the confidence per- sonal experience justifies that the species described here are without exception palatable and harmless. In the individual descriptions the statement as to taste and odor apply of course to the mushrooms when raw and fresh. The diagnoses of these fungi were originally written in Latin. However, it was thought inadvisable to have them appear as a Government publication in this language; therefore the following translation has been made, and the Latin diagnoses are published in Annales Mycologici, volume 3, No. 1 : Lycoperdon todayense Copeland. Peridium obovate or pyriform, 1 to 2 cm. in height, 1 to 1.5 cm. in thickness, plicate at the base, entire above, clothed when young with minute deciduous warts or flakes which are hyaline when moist, later finely and obscurely areolate, white at first, turning yellow, opening by a small aperture at the top; the fertile gleba very distinct from the sterile, cellular base; spores globose, smooth, 3.5 to 4 /i in diameter; capillitium rudimentary, irregular, thick. Todaya, Davao, caespitose about the base of a Musa. 141 142 EDIBLE PHILIPPINE FUNGI. Coprinus confertus Copeland. Gregarious and caespitose, varying greatly with the weather; pileus fleshy, conical; if grown in dry weather very thick, covered with appressed, whitish, cottony flakes, the margin entire or cleft a few times; but when rainy thinner, clothed with an evanescent, silky net, grayish-black, striate, with tawny or stramineous disk and lacerate margin; gills grayish-black, crowded, lanceolate, free but close; spores ovate, 14 to 16 by 7.5 to 9 p. truncate, black; stipe white, smooth, hollow, in dry weather turbinate, 2.5 cm. high, 1.5 cm. thick; but when rainy, as much as 16 cm. high, 6 to 15 mm. thick, equal, or narrowing upward, base equal or subbulbose, with a strong radical cord. Manila, on horse manure. This species is near C. picaceus Fries, differing from it chiefly in the strongly rooting base and in growing on manure instead of on ground. C. ater Copeland. Odorless, with fairly agreeable taste; pileus obtusely conical at first, becoming plane, 14 mm. broad, disk tawny, periphery passing from dark gray to very black, bearing minute, deciduous, dark brown scales or granules, the flesh 30 ^ thick; gills free, narrow, black; spores black, 15 by 9 /u, exstipitate; stipe fistulose, smooth, white, equal, or narrowed upward, at most 5 cm. high, 1.5 mm. thick, most often 2.5 cm. high, 0.8 mm. thick. Davao, on horse manure. C. ornatus Copeland. Odorless, with fair flavor; pileus passing from campanulate to broadly conical, obtuse, 12 mm. wide, sulcate, the disk tawny, ornately beset with dark brown granules, the periphery smooth or pulverulent, changing from white or tawny to black; gills 7 mm. long, 1.2 mm. deep, narrowly adnate, without cystidia; spores 10 by 7 n, black; stipe straight, 2.5 cm. or less high, 1 mm. thick, equal or slightly contracted upward, smooth, white or hyaline, with ferruginous base, scarcely hollow. Gimogon River, Negros, on wood of various kinds, and ground in chip- yard, mostly solitary. Related to C. Staudtii Hennings. C. Bryanti Copeland. Pileus passing from white through brown to black, smooth, campanulate, 6 to 8 mm. high, 5 mm. wide, thin, odorless, fine-flavored; gills free but touching the stipe, 1 to 1.5 mm. deep, dark brown, obtuse; stipe straight, white, solid, 2.5 to 3 cm. high, 1.5 mm. thick, equal, smooth, substriate at the top, wih scarcely thickened base surrounded by white hairs 1.5 mm. long; veil obsolete; spores smooth, brown, 8 by 4.5 n, with hyaline, truncate apex. Gimogon River, Negros, on a rotten Ficus trunk; a smaller form collected on rotten wood by the Baroring River, Mindanao. This is a real Coprinus, in spite of the spore color of Bolbitius. It bears the name of R. C. Bryant. of the Forestry Bureau, my host when it was collected. C. con co lor Copeland. Odor none, taste mild; pileus conical, with spreading margin, about 2.5 cm. high and wide, subfleshy, brown, very smooth and naked, deliquescing first at the lacerate margin ; disk brownish, subumbonate; gills 2 mm. deep, free, crowded, obtuse, remaining a long time pale, then turning dark at their edges first; spores dark brown, 8 by COPRINUS CONFERTUS COPELAND. COPRINUS. 143 4.5 n; cystidia wanting; stipe about 9 cm. high, 5 mm. thick or a little more at the base, white or brownish, smooth, hollow, without annulus. Todaya, Davao, terrestrial in forest. Eaten by the Bagobos, who call it "ligbus." C. volutus Copeland. Pileus 1 to 1.5 cm. wide, thin, naked, early explanate and later revolute or involute, turning from gray to black, the flat disk ferruginous and warty; gills free but very close, at first obtuse at both ends, soon splitting from the top of the pileus but not from the margin, spores black, narrowly ovate, 12 to 13 by 6.5 n; stipe 4 cm. high, 1 to 1.5 mm. thick, slightly attenuate upward, white, naked, hollow. Manila, on rotting leaves. Differs from C. deliquescens Fries in that the lamella are so close to the stipe as to appear adnate. C. revolutus Copeland. Pileus 2 cm. or less wide, passing from cam- panulate through plane to broadly revolute, the disk flat and brown-gran- ulose, the periphery subfurfuraceous, sulcate; gills 70 or less, barely touching the stipe, narrow, acute at both ends, black; spores 11 to 13 by 8 ju, black, apiculate at base; stipe about 10 cm. high, 1 to 1.5 mm. thick at the top, 2 to 2.5 mm. toward the base, white, hollow, fragile, velvety below. Manila, coprophilous. Related to C. nebulosus Zoll., but distinguished by the stipe's being velvety below but not bulbous; similar to C. rostrupianus, but essentially different in the split gills. Among the species of its own section, this is notable for its crowded gills. C. rimosus Copeland. Pileus 1.5 to 2 cm. high and wide, thin, cylindric- campanulate or conical, truncate, naked, very early split downward through the gills and so plicate in appearance, tawny-gray outside, turning black in clefts, the tawny disk flat or concave; gills free and somewhat remote, cut away towTard the stipe, obtuse at the margin, black, becoming pale with age, without cystidia; spores 15 by 13.5 p.. black, typically subangular and broadest toward the apex, stipe hollow, white, naked, equal. Manila, on horse manure. This species differs from C. plicatilis Fries in the non-explanate pileus. broader spores and habitat of manure. C. pseudo-pi icatus Copeland. Pileus early flattened out, about 3 cm. wide, thin, at first squamulose, becoming black because of its thinness, deeply split downward through the gills, making the structurally entire margin cuspidate-dentate; disk brown, subumbonate, or in age concave; gills about 60, 3 mm. deep, adnate to a narrow collar, black, or pale after the spores are cast; spores 20 to 22 by 11 to 12 ^ obtuse, thickest toward the base, black; basidia 30 fj. high, disposed regularly over the hymenium, 15 to 20 fj. apart; stipe 10 cm. or less high, 1 to 4 mm. thick, equal, straight, smooth, hollow. Manila, on horse manure and rotten leaves. Related to C. plicatilis (Curt.) Fries and C. sociatus Fries but distin- guished from botli by the large spores, close gills and flakes on the young pileus. 144 EDIBLE PHILIPPINE FUNGI. Panaeolus pseudopapilionaceus Copeland. Pileus 1.5 to 3 cm. wide, hemispherical, without umbo, whitish, not zonate, dry, naked, subfleshy; gills narrowly adnate; stipe changing from nearly white to black, 6 to 10 cm. high, 1.5 to 3 mm. thick in the middle, thicker toward both ends, white-powdery at the top, firm, with a narrow axial canal; spores 6.5 to 8 by 5 to 6 M. Manila, on manured ground. Very like P. papilionaceus Fries, but differing in inequal stipe, less adnate gills, and especially in the shorter spores. P. panaiense Copeland. Pileus 7 cm. or less wide, conical, tawny, fleshy, the surface flocculose when dry, like blotting paper when wet; veil fuga- cious; gills deep, adnate, ashy-black; spores elliptical, 7.5 to 9 by 5.5 to 6.5 fi, appendiculate ; stipe 12 cm. or less high, 1 cm. thick, equal, solid, brittle. Capiz, Panay, on horse manure. Agaricus (Psalliota) Boltoni Copeland. Pileus 10 to 15 cm. wide, passing from globose through cylindrical and conical to more or less plane, clothed with brown scales which are denser and larger toward the fuscous, fissured, plane or subumbonate disk, fleshy, the flesh white, well-flavored, almost odorless; gills numerous, crowded, free, 6 mm. deep, white when young, ultimately dark brown; spores 8 to 9 by 5 to 6 /*, with short basal appendage; stipe 8 to 15 cm. high, stout, with globose base, becoming hollow with age; annulus fixed, ample, persistent, declined, subentire. Davao. A striking species, common in sunny pastures; named for Governor Bolton, of Davao. A. (Psalliota) Merrillii Copeland. A large species, sometimes 10 cm. high and wide, almost without taste or odor; pileus naked or scaly, turning from white to brown, shining, subfleshy, truncate or with concave apex when young, sometimes umbonate in the middle of the depression, when old plane, with a horizontal, entire or incised border, 1 to 2 mm. broad, derived from the veil; gills about 250, crowded, 5 mm. deep, subacute at the margin, salmon-colored when the veil ruptures, finally turning black- brown; spores minute, 6 by 3.5 /u, uninucleate; veil rupturing late; annulus high up, white on both sides, floccose without, very lacerate, pendent; stipe somewhat contracted toward the top, abruptly enlarged at the base, solid or nearly so, whitish or turning brown outside and inside. Manila, terrestrial under trees. This species is near A. platensis Sacc. & Sydow. (A. lepiotoideus Speg.), but differs in its larger size, entire periphery, annulus white on both sides, and abruptly enlarged base. It is very variable in color and scaliness. Named for my colleague, Elmer D. Merrill. A. (Psalliota) argyrostectus Copeland. Pileus 3.5 cm. wide, passing from conical to convexo-plane, shiny white, always naked, subfleshy, with unchanging gray flesh without odor, tasting like A. campestris; gills 3 mm. deep, free, obtuse at both ends, gray, turning dark; spores 5.5 to 6 by 4 to 4.5 n, without guttules; stipe 3 to 4 cm. high, 4 to 8 mm. thick, firmly attached to the pileus, terete, scarcely enlarged downward, solid or nearly so; annulus membranous, pendent, early breaking up and disap- pearing. AGARICUS. 145 Davao, in sunny pastures, not common. This species resembles A. argenteus Braendle and A. argyropotamicus Speg. ; it. differs from them in the pileus' being conical at first, the disk's shining like the periphery, unchanging flesh, and eguttulate spores. A. (Psalliota) manilensis Copeland. Pileus convex, smooth, squam- ulose with disk flat and dark brown; toward the margin, where the scales are sparse, becoming white, subfleshy; gills free, rounded toward the stipe, turning from rose to dark-brown; spores about 7.5 by 4 p, obtuse, oblique at the base; stipe 5 cm. high, 2.5 mm. thick, equal, naked, smooth, hardly solid; annulus fixed, entire, convex upward. Manila, in lawns. Resembles A. haematospermiis Bull, and A. dy spines B. & Br. A. (Psalliota) perfuscus Copeland. Entire fungus brown, darkening with age, odorless, with the flavor of A. campestris; pileus early expanded, 3 to 4 cm. wide, undulate, squamulose, subfleshy, disk slightly depressed, margin strongly but deciduously appendaged; gills free, close, obtuse at both ends, 4 mm. deep; spores elliptical, 6 to 6.5 by 4.5 //., obscurely 1- or 2-guttulate; stipe 3 to 4 cm. high, 3 to 4 mm. thick equal, firm, naked, subhollow; annulus high up, fugacious. Manila, subgregarious on manured ground in the old botanical garden. Resembles A. insinuatus Cooke and A. haematospermus Bull. Lepiota chlorospora Copeland. Pileus fleshy, passing from globose through campanulate to broadly conical, 8 cm. wide, 4 cm. high, the periphery sometimes explanate, disk with a brown, entire or fissured cap, periphery sparsely clothed with pale brown scales and fibers, white near the entire or subciliate margin; gills free, remote, 5 cm. long, 8 mm. deep, crowded, narrowed toward the stipe, white at first, turning a greenish-blue, their edges made of hyaline vesicles 25 to 35 by 20 n; spores hyaline-green, 8 by 5 /*, smooth, short-stalked, each with a single large globule containing the green pigment; stipe 8 to 10 cm. high, 6 to 8 mm. thick, straight or crooked, knotted, firmly attached to the pileus, brown outside and inside, with white pith; annulus 1 cm. broad, conspic- uous, fixed, persistent, split in its own plane, white above until discolored by the spores. Manila, in lawns. Distinguished from L. esculenta (Massee) Sacc. and Sydow by the brown scales and fixed annulus. Massee established the genus Chlorophyllum for these green-spored species; but it seems to me better to keep them in Lepiota and extend its characterization sufficiently to cover them. The spores are of the same color as those of Aspergillus glauous. L. manilensis Copeland. Flavor excellent, odor almost none; pileus 5 to 9 cm. wide, campanulate-conical, later flat, subumbonate, striate near the margin, the disk densely clothed with minute brown scales, which become sparse toward the margin; flesh whitish, unchanging; gills free, not attached to a collar, crowded, deep, whitish, subacute at both ends; spores variable, commonly 10 by 6 to 7 n, the largest 13 to 15 by 7.5 to 9 n, hyaline; stipe 10 cm. or less high, 1 cm. thick, firm, equal or somewhat 24036 10 146 EDIBLE PHILIPPINE thickened downward, with an axial canal, white or pale brown, naked; ring movable, or half-fixed, entire, with a dark brown margin. Manila, around Pithecolobium and Terminalia. L. elata Copeland. Odor and taste mild; pileus conical at first, but soon flat, 4 to 6 cm. wide, umbonate, fleshy, silky-squamulose about the disk, elsewhere naked, margin substriate, broadly reflexed when old, disk brown- ish, periphery white, turning dark red; gills also turning from white to dark wine-color, free, close, crowded, ventricose; spores 9 to 10 by 5 to 6 H, hyaline, symmetrical; stipe 5 to 8 cm. high, 5 mm. thick at the middle, somewhat thickened downward, but not bulbous, naked, with an axial canal ; ring midway, free, convex, narrow, entire, brown, fugacious, sometimes attached to the margin of the pileus. Manila, in manured lawns. Judging by the descriptions, this resembles L. inebriata B. and Br. and L. microspila Berk., both species Ceylonese. L. Candida Copeland. Odor wanting, taste mild; pileus 7 cm. wide, flat, strongly umbonate, dry, shining, almost naked, the disk fleshy, the margin thin, substriate, minutely crenate, the flesh unchanging; gills free, close, very crowded, lanceolate, subacute at both ends, thin, white; spores 9.5 by 6 n, hyaline, guttulate, apiculate; stipe 15 cm. high, 5 mm. thick near the top, with a narrow axial hollow, much enlarged but not bulbous in the solid lower part, naked, shining white, deeply sunken into disk but not confluent with it; annulus high up, deciduous. Manila, solitary in sunny grass. Well characterized by the strongly fusiform lower third of the stipe. AT10NS OP THE BUREAU OF GOVERNMENT LABORATORIES. (Continued from second page of cover.) 19, 190^, Biological Laboratory. — Some Observations on the Biology of the Cholera Spirillum. By Wm. B. Wherry, M. D. 20, 1904- — Biological Laboratory: I. Does Latent or Dormant Plague Exist Where the Disease is Endemic? By Maximilian Herzog, M. D., and Charles B. Hare. Serum Laboratory : II. Broncho-Pneumonia of Cattle : Its Asso- ciation with B. Bovisepticus. By Paul G. Woolley, M. D., and Walter Sorrell, D. V. S. III. Pinto (Pano Blanco). By Paul G. Woolley, M. D. Chemical Laboratory: IV. Notes on Analysis of the Water from the Manila Water Supply. By Charles L. Bliss. Serum Laboratory: V. Framboesia : Its Occurence in Natives of the Philippine Islands. By Paul G. Woolley, M. D. 21, 190Jf, Biological Laboratory. — Some Questions Relating to the Virulence of Micro-organisms with Particular Reference to Their Immunizing Powers. By Richard P. Strong, M. D. 22, 1904, Bureau of Government Laboratories. — I. A Description of the New Buildings of the Bureau of Government Laboratories. By Paul C. Freer. M. D., Ph. D. II. A Catalogue of the Library of the Bureau of Govern- ment Laboratories : By Mary Polk, Librarian. 23, 1904, Biological Laboratory. — Plague : Bacteriology, Morbid Anatomy, and Histopathology (Including a Consideration of Insects as Plague Carriers). By Maximilian Herzog, M. D. 24, 1904, Biological Laboratory. — Glanders : Its Diagnosis and Prevention, Together with a Report on Two Cases of Human Glanders Occurring in Manila and some Notes on the Bacteriology and Pleomorphism of Bacterium Mallei. By William B. Wherry, M. D. 25, 1904.1 — Birds from the Islands of Romblon, Sibuyan, and Cresta de Gallo. By Richard C. McGregor. 26, 1904, Biological Laboratory. — The Climical and Pathological Significance of Balantidium Coli. By Richard P. Strong, M. D. 27, 1904. — A Review of the Indentiflcation of the Species Described in Blanco's Flora de Filipinae. By Elmer D. Merrill. ablications of the Bureau are given out in serial number pertaining to the •e Bureau. Publications which may be desired can be obtained by applying ae Librarian of the Bureau of Government Laboratories, Manila, P. I., or to Superintendent of Government Laboratories, Manila, P. I. "he first four bulletins in the ornithological series were published by the lological Survey under the title "Bulletins of the Philippine Museum." Future thological publications of the Government will appear under the title "Pub- ions of the Bureau of Government Laboratories." QK 52*f P7C79 000887944 7