162 ILLINOIS ACADEMY OF SCIENCE There is practically no danger of extermination facing this pretty species for its home has absolutely no value to man and only the wild climbing folk can by any possibility obtain pre- carious footing where it dwells in peace. The hog, that arch enemy of the wild plant people, can never tread these cliffs and the average human plant hog is too solicitous of his neck or extremities to venture on these slippery steeps. In conclusion, a brief statement of the geographical distri- bution of our plant will be interesting. Gray, Britton, Bailey and others agree in giving it a far northern range extending well into the arctic regions of North America and reaching the United States in Northern Maine, Vermont, New York, Upper Michigan, Wisconsin, Minnesota and so North West to the Saskatchewan. This remarkable southern extension into the northwestern Illinois, therefore, is Mistassinica's "farthest south" by over one hundred miles from any neighboring station. The inference is drawn that this station is a remnant of a vast horde of the plant that in preglacial days occupied much of the rock region of Northeastern North America, the glaciers hav- ing obliterated most of these plants, the Illinois locality es- caping because the ice destroyer did not there encroach. PORTO RICAN FUNGI, OLD AND NEW F. L. Stevens^ University of Illinois While numerous collectors have focused their attention on the flowering plants and ferns of Porto Rico, comparatively little study has been made of the lesser cryptogams, especially of the fungi. Mr. A. A. Heller collected fungi in Porto Rico in January and February, 1900, and the collection is reported upon by F. S. Earle'. Heller's collection of December and January, 1902-1903, are reported also by Earle^ Earle also made re- ports of his own observations on the fungi of the island'. Olive and Whetzel reported upon several species of rusts which they collected in Porto Rico in the summer of 1916.* 1. Muhlenbergia 1:10, July, 1901. 2. Bulletin of the New York Botanical Garden, 3: 301, Jun« 30, 1904. 3. Annual report of the Office of Experiment Stations, 454, 1903. 4. American Journal of Botany, 1 :44-52, January, 1917. PAPERS ON BOTANY ^'^ Mentions are also made of the more conspicuous of the fungi affecting economic plants in various bulletins of the Porto Rican Agricultural Experiment Station and reports of the Board of Commissioners of Agriculture. In addition to the above, reports have been made upon my own collections by Arthur, J. C.°; Young, Esther'; Garman, Philip'; Stevens, F. L.' Several other articles based on this collection are presented at this meeting. In the present report are listed only fungi not noted in the above mentioned articles. My collections are as yet far from being determined, and this list represents merely part of the few specimens that have been studied. Unless otherwise indi- cated, the specimens were collected by the author, and the num- bers given are those of his collection as deposited in the her- barium of the University of Illinois. For determination of the flowering hosts I am greatly indebted to Dr. N. L. Britton and Mr. Percy Wilson ; for fern determinations to Miss Slosson, for grass determinations to Mrs. Agnes Chase. The Hymenomycetes were determined by Dr. W. A. Murrill, the Myxomycetes by Dr. T. H. McBride, the Ustilaginales by Dr. G. P. Clinton. Myxomycetes Diachea Fries Diachea leucopoda (Bull.) R. on Pitcarnia angnstifolia, Sta. Ana. 6683 ; on Pitcarnia sp., Preston's Ranch, 6705. Physarum Pers. Physarum sp? on Opuntia sp., Guanica, 320. Comatrichia Preuss. Comatrichia langa Peck., on (?), Porto Rico, no number. Tilmadoche Fries Tilmadoche compa^ta Wing, (probably), Porto Rico, no number. 5. I'redinales of Porto Rico based on collections of F. L. Stevens, Mycologia, 7: 168-196. 227-255, 315-322; 8: 16-33. Sept.. Nov.. 1915; and January, 1916. 6. Studies in Porto Rican Parasitic Funffi. Mycologia. 7: 143-150, May, 1915. Studies in Porto Rican Parasitic Fungi II., Mycologia 8:42-46, January, 1916. 7. Some Porto Rican Parasitic P'ungi I., Mycologia 7: 333-340, November, 1915. 8. The Genus Meliola in Porto Rico, Illinois Biological Monographs, No. 4, April, 1916, and Meliolicolous parasites and Commensals. Botanical Gazette, in press. 164 ILLINOIS ACADEMY OF SCIENCE Phycomycetes Chytridiales Synchytrium De Bary and Woronin Synchytrium decipiens Farl. on Rhynchosia reticulata. Que- bradillas, 5128, Cabo Rojo, 2278. 2144. Peronosporales Albuginaceae Albugo (Pers.) Russell Albugo ipomoeaepanduratme (Schw). Swing., on Ipomoeae batatas, Monte de Oro. 5732. Tanama Rio, 7886, Consume, 894, Arecibo-Lares road, 7306, Manati, 7706, Corosal, 410, Luquillo 2780, Boqueron. 342. Guanica 340, 346a, Guay- anilla, 5898 ; on Ipomoeae pes caprae. Santurce, 247, Dos Bocas, below Utuado, 6636, Guanica, 6834, Boqueron, 346, Mayaguez, 7502, Point Cangrejos, Stevenson, 5455. The Albugo on this host is especially conspicuous, causing much distortion of the parts affected. On Ipomoeae tiliaceae, San German, No. 5610. Garrochales, 3763, (Stevenson). On Jacquemontia nudiflora, Guayanilla, 5905, Mona Island, 6357. On IpotKoea sps. Rio Piedras, 5772, Pefiuelas, 9142, Mona Island, 6236, 6208, 6080. Albugo platensis (Si>eg.) Swing., on Boerhaavea erecta, Guanica. 319a, Guayanilla. 5896, Mona Island, 635. Albugo bliti, (Biv.) Ktz. on Amarantus sp. Jajome Alto, 5679; on Amaranthus viridis, Rio Piedras, (Stevenson), 3870. Albugo Candida (Pers.) Kuntze; on Lepidium mrgimcum, Tanama Rio 7822, Comerio (dam). 5035, (Stevenson). Albugo portulacae. On Portulaca oleracea, Mayaguez 7052. Peronosporaceae Peronoplasmopara (Berl.) Clint. Peronoplasmopara cubensis, (B. & C.) Clint. On cucum- bers, Rio Piedras 3621, (Stephenson). On Luffa cylindrica, Rio Piedras, 7004. Cenangiaceae Pezizales Ephelis Fries Ephelis sp., on Erichha sub glabra, Rio Piedras, 4195, (Johnston). papers on botany -^'^ Phacidiales Tryblidiaceae Triblidium Duf. TrybHdiunt refulum (Spreng.) No. 6737. aspergillales Aspergillaceae Penicillium Link Penicillium digitatum (Ft.) Sacc. On grapefruit. Palo Seco. 3976, (Stevenson). Myriangiaceae Myriangium Diir. Myriangium duriaei Mont. On white scale. Palo Seco. (Stevenson) 3886. Perisporiales Erysiphaceae Though diligent search was made for powdery mildews with perithecia, none were found in Porto Rico. The conidial stage occurred on many hosts and with great frequency. It is of course impossible to make satisfactory determination of the genera and species of these without perithecia. Ilie following Erysiphaceae represent merely collections of Oidium and are given with the names of the species to which they may belong, i.e.. with these species which are known to occur on these hosts. Microsphaera Leveille Microsphaera euphorhiac (Pk.) B. & C. (?) On Chamae- syce hrazilioises, Mona Island, 6100. Maricao. 4805. Pefiuelas, 4176; on Chamacsyce hypcrsicifolia. Mona Island. 6405. Ja- jome Alto, 5639; on Hibiscus sabdariffa, Mayaguez. 5775; on Manihot, Preston's Ranch. 6606. Microsphaera diffusa D. C. ( ?) On Meibomia sp. Rosario, 4801 ; on Meibomia supin-a, Utuado. 6867. Jayuya. 6075 : on Meibomia scorpixirus, Manati. 5301, Guayama. 5332: on Mei- bomia adscendens, Utuado. 4420. Crotalaria retusa. Sta. Ana. 3967. Coamo. 843, 5105. On Meibomia tortuosa. Penuelas. 9146. on Meibomia sps. Mona Island. 6197. Sphaerotheca Leveille Sphaerotheca humuli (D. C.) Burr. (?) On Verbena, (cult.); on Rosa (cult.). Maricao, 767. 4005; on Cosmos 166 ILLINOIS ACADEMY OF SCIENCE — ; on Bidens, sp. Jayuya, 6074, on Bidens reptans, Vega Baja, 476, Maricao, 4483 ; on Xanthium longirostre, Afiasco, 8740, Guayama, 5406; on Melanthera canescens, Utuado, 6039, 652, on Ocimum micrantkiim, Utuado, 8062. Erysiphe Hedwig Erysiphe cichoracearum D. C. (?) On Dahlia, Monte Alegrillo, 2358; on Solaniim torvum, Rosario, 4816, Preston's Ranch, 6696, Cabo Rojo, 2239; Maricao, 2367, Arecibo, 6800; Naguabo, 9388, Penuelas, 9161. 9145, Mayaguez, 7064, 7322, Hormigueros, 7363, Maricao, 8825, 9127; on Cosmos caudatus, Sta. Ana, 7614, Tanama Rio. 7868 ; on Eupatoriiim microste- inmn, Maricao, 4812. Erysiphe polygoni D. C. (?) On Cassia sp., Utuado. 6051 ; on Cassia occidentalism Guayama, 5330. 5416, Rio Piedras, 5771, Rosario 9497, Pefiuelas, 9138, Arecibo-Lares Road, 7304, 7314, Cabo Rojo 9083. Manati, 4312, 5312; on Cassia tora. Maricao 2368, 8902. Quebradillas, 5625, Aguada, 5084, Penuelas, 4897, Guayanilla. 5927, 5897. San German, 5802, Guayama. 5399, Adjuntas, 6021. Mayaguez, 3024, 3882, 9152; on Phaseolus sp., Mona Island, 6247, Mayaguez, 6749; on Ph. adanthiis, Aguada. 5075, on Vigna re pens, Mayaguez, 1856; on Chanmecrisfa, Pefiuelas. 9159. On Arraciaxannthor- rhiza, Indiera Fria, 3468. Erysiphe galeopsidis (?) On Eupatorium, Ponce, 4265. Perisporiaceae Hyaloderma Speg. Hyalodenna piliferiim Pat. on Meliola sp.. determined by Patouillard. Santurce. 1368. This specimen in the Bronx collection shows a Meliola with a Calonectria upon it, but the portion which I had did not show the Hyaloderma. Dimeriella Speg. Dimeriella erigeronicola sp. no v. Fungus superficial, epi- phyllous. black. Colonies circular, 1-4 mm. in diameter. No effect visible on the leaf tissue. Mycelium copious, straw- colored, crooked, about 1.5 /* in diameter, septate. Perithecia black, numerous, globose, 64-102 /* in diameter, bearing num- erous, 15+, appendages, mostly basal, which are similar in structure to the mycelium but darker in color, 1^-2 fj. in diam- eter, somewhat crooked, septate. Ostiole minute but distinct. Asci cylindrical, 31-34x7 /*. 8-spored, obtuse. Spore two- PAPERS ON BOTANY ^^' celled, 7x\-5fi, hyaline or very pale yellow. Paraphyses num- erous, fine, thread-like, crooked. On Erigeron spathulaHis, Quebradillas, 6821 (type), Mau- nabo, 2453, Yauco, 3240. El Gigante, 8522, Maricao, 8935 ; on Erigeron pusillum, Maricao, 8805. Dimeriella olyrae sp. no v. Fungus superficial epiphyllous. Spot none, the fungus coat- ing the leaf surface evenly with black; mycelium yellow to dark brown, abundant, septate, crooked, about 3-4 fi thick with a tendency to aggregate into a film at spots. Perithecia numerous, 51-68 i^ in diameter, black, slightly rough, each bearing 1-4, long, 234-300 z^, black setae. No ostiole. Asci ovate, 51-65x24 h-, 8 spored; spores inordinate, 17x7 fi, 1-sep- tate, hyaline. No paraphyses. On Ol\ra latifolia, Preston's Ranch, 6770 (type), Maricao, 3639, 190, 3472, 8959, 8942. Mayaguez. 7486, 7587. This fungus is striking in the abundance of perithecia and the long, black setae on these. It clearly differs from Dimer- ospormm oligotrichum Mont. & Sacc. (Not Sacc. & Berl.) which according to v. Hohnel belongs to the Capnodiaceae. Dimeriella cordiae (P. Henn.) Th. On Cordia sulcata, May- aguez, 975. Dimeriuni grammodes. On Meibonuia barbata, Rio Piedras, 7007. Perisporium Fries Perisporium trun^atum sp. nov. Hypophyllous, forming smoky patches 1-2 cm. in diameter. Mycelium copious, superficial, brown, uniform. 7 m. with septa about 50 /x apart, branches often at right angles. Hyphopodia none. Mycehal setae erect, simple, straight, septate. 310 m long, 3.5 fj- thick at top, 8 m at base. Perithecia spherical, astomate, slightly rough, 109-202 fi, carbonous ; cells about 17 fi in diameter. Asci ovate to cylindric, 125x34 fi, thin walled. Spores 2-septate, cylindric. 68-92x10 /x, hyaline when young, smoky or darker when old, rounded at one end truncated and with a ring around the other end. On Inga laurifui, Maricao. 3657. 7023, Mayagiiez. 7049 (type). 7477. 7038. 7474. 9137. 974. 3905. 1076. El Alto de 168 ILLINOIS ACADEMY OF SCIENCE la Bandera, 8273. 7559, Coamo 605. On Inga vera Maricao, 762. It differs decidedly from Zukalia fusispora Pat. as de- scribed on Inga. It is often overgrown by a fungus which has a fine white mycelium which weaves into a close mat forming white spots from a few millimeters to a centimeter or more in diameter. Perisporium bromeliae sp. nov. Spots hypophyllous, smoky, 1-2 cm. in diameter. Myceiium superficial, abundant, brown-black, septate, sparsely branched. Perithecia irregular, globose, 110-120 /-i, no ostiole. Asci ovate fasciculate from base of perithecium, numerous, 50-58x20 m, 4- spored, no paraphyses. Spores fusiform, straw-colored, irregularly 0, 1, 2 or 3-sep- tate, 30x8-10 /*, not constricted at the septa. On BromcUa pinguin, Manati, 4329. (type), 1832, Utuado 6577, 8081, Mayaguez. 3912, 7573, 7034, 7094, 7426, Rio Tanama. 7999, 8106, Sta. Ana. 7613, Catafio 7708, Vega Baja 7719, Florida Adentro, 7679, Lajas, 7150, Hormigueros, 7370, Coamo. 8355, 8356, Maricao, 8925, Afiasco 8751. This is very common on the host in all parts of the island. The smoky blotches are so usual as to seem to belong to the plant. The perithecia are almost exclusively found in the fur- rows or grooves between the heavy veins. This fungus in its perithecium clearly shows its relationship to the Perisporiales, but within that order its position is much less certain. The spores vary much in septation. being from 1 to 4-celled in spores which are fully mature. In the Phaeos- porae there is a general resemblance to Cephalotheca but the ascus structure is not that characteristic of that genus. In the Phaeophragmiae where the fungus evidently belongs, it differs distinctly from Meliola in many respects, especially in character of mycelium and spores: From Schenckiella in spore charac- ters : from Perisporina in mycelial and spore characters. Its agreement seems to be most close with Perisporium from the description of which it differs in its 4-spored ascus. Notwith- standing this difference, however, it seems best to place the species in Perisporium. PAPERS ON BOTANY ISO I'erisporiimi portoricoisc sp. ?i()v. Stevens and Higley. Fig-. 1. Colony, dark brown, round, scattered, hypophy lions or epiphyllous, sometimes amphigenous, 0.5-1.0 cm. in diameter Or by coalescence occupying- the leaf. Mycelium copious, dif- fuse, dark, smooth, hyphae branching at nearly right angles, 7-9 /t in diameter. No hyphopodia. Perithecia numerous, globular, black, gregarious, carbonaceous, without appendages, ostiole or parai)hyses, surface slightly rough, 175-270 fi in diameter. Asci cylindrical, 8-spored, oblong, obtuse, stip- itate. attached basally, 37-50x92-125 p-. Spores slightly curved, obtuse at apex, base somewhat acute, 3-septate, sep- arating at septa, end sections more or less conical, 8-9 /* x 70- 80/1. Fig. 1. Perisporium portoricensc. by R. Higley. Asci and spores. 7489 (type). Drawn 7489 (type). On Calophyllum calaba, Mayaguez Mesa Vega Baja, 4310. The mycelium bears numerous curved hyphae standing up- right. The ascus walls are hyaline and very thick except at the apex where there is a slight notch on the inner surface. The fungus is peculiar in that sometimes it is quite strictly limited to upper surfaces, again to lower surfaces, while it is 170 ILLINOIS ACADEMY OF SCIENCE sometimes amphigenous. The spores when young show no indication of falling into segments and are straight and smooth. It is only in quite mature asci that they show the character as given in Miss Higley's drawing. In earlier condition and as more often seen they would indicate that the fungus belongs to the genus Perisporina of Henning. Perisporiopsis gen. nov. Type P. ivrightii Perisporiopsis wrightii (B. & C.) comb. nov. Perisporiuin wrightii B. & C. On Opuntia. Mayaguez, 6293, Ponce, 6778. These specimens in their general appearance, which is very distinctive, agree closely with the excellent description given by Wolf of Texan material.' and with a sporeless fragment of Wolf's material which was loaned to me from the New York Botanical Garden. The rare character of spores of violet-color turning to brown with age, seems to make it certain that the P'orto Rican specimens are co-specific. The affinity with the Plectascineae as shown by Wolf's drawings (Fig.c, p. 126, I.e.) and by my own observations, and the additional character that the spores are frequently muriform, prevent regarding this fungus as a Perisporium. It differs distinctly also from Meliola, Pleomeliola and Cleistotheca, and the above named genus is therefore created for it. Perisporina P. Henn. Perisporina lantanae sp. nov. Fungus hypophyllous forming an abundant sooty coating, thickly strewn with perithecia. Mycelium dark straw colored to black, many septate, about 4 /«. in diameter, without hyphopo- dia. Perithecia 110-130 /* in diameter when mature, when young, surrounded by an areola of radiating hyphae, densely beset with setae which in general nature are like the mycelium, varying from 70 to 480 /* long, about 7 /* thick at base, many septate, dark. Perithecial wall closely reticulate; perithecium irregularly globular, non-ostiolate. Asci 61-68x17-20 /*, 8- spored, inordinate. Paraphyses hyaline, filamentous, branched. Spores 2-3 septate, apparently usually 3-septate when mature, dark, 34-37x6-7 /*, two cells larger than the other two. On Lanfana camara Lares, 4924 (type) . 4926. 1. Ann. Myc. 10:125. 1912. PAPERS ON BOTANY 171 Dimcriupsis gen. nov. Fig. 2 This genus of the Dimerineae is characterized by the devel- opment of the perithecia below a niycchal skin. Type D. ar- throstylidicola. Dimcriopsis arthrostylidicoki sp. nov. Fig. 2. Spots black consisting of superficial mycelium encircling the stems, 0.5 to 2 ^ long. Mycelium coarse, 4-5 ii, somewhat ciooked, brown, densely interwoven and matted in older por- tions, at edges ladiate. Hyphopodia none. Setae 312 /a long by 10 /u, thick, thick-walled, numerous on older mycelium. Per- ithecia 400-450 yu. in diameter developed below the mycelial layer, sides and top well developed, of brown hyphae, base ex- tremely thin, hyaline. Ostiole none. Asci numerous, 100-1 50x 25-30 /A, clavate, thick-walled, with a thin spot at the apex, 8- spored. Paraphyses present, filamentous, matted, gelatinizing. Spores straight to slightly falcate, inordinate, 2-celled, rarely 4-celled, dark brown, constricted at septa, 12-14x40-55 /* obtuse. On Arthrostylidium sarmentosum. Monte Alegrillo, 4772 (type). (a) Fig. 2. Dimeriopsis arthrostylidicola (a) Tip of an ascus showing spores and the apical thin spot, (b) Spores showing the constriction at the septa, 4772. Drawn by J. Maclnnes. This fungus, clearly Perisporiaceous, in its superficial mycel- ium, and general characters falls within the Dimerineae.' and close to Dimerium. From this genus, however, it differs rad- ically in charcater of the perithecium, very large size and pe- culiar shape of spores and the presence of abimdant paraphyses. The most striking feature is that the perithecia develop below the mycelium, i. e., the mycelium over a considerable area coalesces to form a continuous black skin which is, however, only one layer thick ; and below this skin in a partially de- 1. Theissen, Bot. Cent. 29:46. " 172 ILLINOIS ACADEMY OF SCIENCE veloped hyaline stroma are the perithecial cavities. In teasing ■J. specimen the asci and paraphyses adhere together and often fall out entire, like the meat from the shell of a nut, leaving a mold of their form behind. Meliola Fries. Meliola melastomacearuui Speg. On Micomia impetiolaris, Mayaguez, 3922; on Heterotrichum cymosmn, Utuado, 4359. Meliola sp. indet. On Podocarpus coriaceous, Maricao, 6774. The mycelium here is unquestionably that of Meliola, but no perithecia are present. The specimen is worthy of note since no Meliola is recorded on this host or its family. Meliola leguncitlariae. E. On Conocarpus erecta, Maya- guez, 7201. MlCROTHYRIACEAE The representative of this family, one of the most common in the tropics, w^ill be the subject of a separate paper. Hypocreales Hypocreaceae Hyalospliaera, gen. nov. type H. miconiae. Hyalosphaera miconiae, sp. nov. Spot indefinite, roughly circular, above pale to yellow, 3-10 mm. in diameter; below pale and coated with buff mycelium centers ashen-grey due to ascospore color, mycelium 5 /*, sep- tate, branched, hyaline. Perithecia, smooth, spherical to ovate when mature, hyaline, transparent, entirely closed when young, open at top when ma- ture, 80-100 At in diameter, v/ithout stroma or subicle; wall 4 /* thick at top, and sides, transparent, opening by apical rupture but without a differentiated ostiole. Asci clavate to oblong, obtuse, thin-walled, numerous, originating from the pseudopar- enchymatous base of the perithecium, 8-spored, spores longi- tudinal. Paraphyses numerous, exceeding the asci, very fine, 1 ti. Spores linear, 2-3 usually 3, septate, smokey to brown, 40- 57x5 /i. PAPERS ON BOTANY 173 On Miconia laevigata, Arccibo, 6804, Utuado, 6862, 6871, Maricao, 207 (tyjK') 4822, Agiias Buenas, 302, Ponce, 4338, Yabucoa, 6705. This fungus forms buff-colored spots over the lower surface of Miconia leaves and though its internal mycelium was not demonstrated, there are formed distinct spots on the host, areas that are yellowed or bleached. In the centers of the older spots are seen regions of ashen-grey appearance that might lead one to suspect the presence of a Cercospora. Examina- tion, however, shows this ashen-grey region to be due to myr- iads of transparent perithecia containing dark ascospores. It is possible with a scalpel to lift from the leaf several square millimeters of the fungous weft, for microscopic examination. It proves to be made of an exceedingly loosely woven hyaline mycelium. Borinqiienia gen, nov. Ety. from Borinqucn, the ancient name of Porto Rico. Per- itheciiim fleshy or membranous, ostiolate, reddish ; asci fascicu- late, basal, i)araphyses present ; spores linear, septate, brown. Type of genus the following : Fig. 3. Borinquenia miconiae. Perithecium, ascus, paraphyses and spores, C871a (type). Drawn by J. Maclnnes. Borinquenia miconia^ sp. nov. Fig. 3. Spot none. Mycelium buff to tawny, superficial. Peri^ thecia abundant, ovate, papillate, hyaline, wall pseudo-paren- 1V4 ILLIXOIS ACADEMY OF SCIENCE chvmatous. rough with rather numerous short, coarse hairs, es- pecially around the base. ISO m high. 150 u thick. Asci numerous, cylindric. 60-55x7-8 ^. obtuse, thin walled, 8-spored. Paraphyses numerous, thread-like, 1-1 J^ /*, longer than the asci ; spores linear, smoky, guttulate. obtuse. 55-65x 2-3 fi. usually crooked, septa not seen. On Micofw h-n^'gata. Arecibo. 6804. Utuado. 6862. 6871, (t^-pe.) In the Saccardian classification, this fungus would fall in the Hypocreaceae-scolecosporae-phaeoscoleciae. in which there is onh" the genus Konradia from which it is clearly distinct. In the classification of Lindau it falls in the H}-pomyceteae and near tlie genera Globulina and Tomibiella from both of which it presents marked differences. D ex term gen nov. In honor of Dr. E. G. Dexter, whose liberal views so ber.e-.:- ed Porto Rico. Mycelium superficial or mainly so. Perithecium astomate. the wall reduced to extreme tenuit}- or becoming gelatinized and amorphous, thus leaving the asci naked or nearly so, at maturity-. T}»-pe Dexteria pidchella. The genus is somewhat like Colonectria but is distinguished from it bv the gelatinization of the perithecial wall and by general habit. Dexteria pulciwlla, sp. nov. Fig. 4. Mycelium ^^-pophyllous, reddish, superficial, scant ; spot none. Perithecia containing from 18-25 asci. Asci when mature, naked or covered only by a mucilaginous residue of tile perithecial wall. Surrounded at base by a few loosehr intertwined strands of reddish-brown mycelium about 3 /« in thickness. Dimension of ascus exclusive of subtending my- celium 65-100 M- Asci clavate to ovate to elliptical, 50x15-22 /I, 8-sp>ored. obtuse, thin-walled. Paraphyses none. Spores linear. 35-42x4-5 m. hyaline, 5-septate. Pxcnidia similar in structure but larger. 110-130 m. slightly darker in color, Co- ridia similar to ascospores but smaller, 17-21x3 m and 3, not 5-septate. On PauIUnia pinn-afa. Mayaguez. 1207 i r>-pe). PAPERS ON BOTANY 175 This fungus is barely visible as a brick-red discoloration of small areas of the lower side of the leaf. The lens shows this color to be due to myriads of minute perithecia and pycnidia interming-Ied. Under the microscope the fungiis appears as one of exqui- sitely delicate beauty. The basal wreath of hyphae marks on its inner side an almost exact circle. Within this circle the asci develop and remain together, covered by a structureless gelatine which when young barely reveals its origin in a loose network of fine mycelial threads. The perithecium is perfectly transparent. So transparent are all structures that the asci may readily be counted looking through the perithecium. either from al30ve or below. Fig. 4. Dexteria pulchella (a) Perithecium showing wreath of hyphae surrounding the asci from which the covering has disappeared. The rupture on one edge was caused by the cover glass. (b) An ascus. (c) Spores. 1207 (type), drawn by J. Maclnnes. Nectria Fries Nectria ochrolciica (Schw. ) Berk. Sta. Ana, 6757. Creonectria Seav. Creonectria gramnicospora (Ferd and Wge) Seaver. On dead wood. Rio Piedras. (Stevenson) 3896, 6736. (•) 1T6 ILLINOIS ACADEMY OF SCIENCE Megalonectria Sacc. Megalonectria p semi trie hia (Schw.) Speg. On host not named. Pueblo Viejo (Stevenson) 5064. Specimens 1569 and 1193 had no perithecia but a Stilbum which is probably the conidial stage of Megalonectria pseudo- trichia. Ophionectria Sacc. Ophionectria coccicola E. & E. On scale on grapefruit. Pueblo Viejo, (Stevenson), 5145. Stilbocrea Pat. Stilbocrea hypocreoides (K. & C.) Seaver. On rotten wood. Espinosa (Stevenson), 2425. Balansia Speg. Balansia discoid ea P. Henn. On Aristida portoricensis Mayagnez, 6011 (Mrs. A. Chase)* Dothicloe Atk. Dothicloe atramentosa (B & C). Atk, On (Serrillo) Andropogon leucostachyus. Las Marias, 8211. Dothichloe aristida^ Atk. On Aristida portoricensis, Mayaguez', 6011, Mrs. A. Chase, on Ichnanthus pollens, Maricao, 778. Claviceps Tul. Claviceps paspali S. & H. On Paspalum plicattdum, Rosario, 3784, Ponce 4371, Ca- tafio 5783, 4188, Afiasco, 3536, Coamo, 4909, Mayaguez, 227. This sclerotial stage of Claviceps is as common on Paspalum plicatulum in Porto Rico as it is on P. laeve and P. dilatatum in the States. The species is very probably either C. paspali S. & H. or C. rolfsii S. & H.^ but which of these it is impossible to determine without germinating the sclerotia, which was not done. 1. Host determined by Mrs. Chase. Fungus by Dr. Atkinson. 2. Stevens, F. L., & Hill, J. G. Three interesting species of Clayiceps. Bot. Gaz. 50:460-463, Dec. 1910. PAPERS ON BOTANY ^^'^ Ustilaginoidea Bref. Ustilaginoidea usaniharensis P. Henn. on Panicum laxum, Monte de Oro, 5708. 5671, El Alto de la Bandera, 4365, 4370, 8660. Dot HIDI ALES Phyllachora Nke. Phyllachora gramdnis ( Pers. ) Fcl. On Paspalum conjugahim; Vega Baja 9269, 9236, El Alto de la Bandera, 8720, on Valota insularis Quebradillas, 9228, 7260, Sta. Ana 7622, Vega Baja 9262, Coamo 8334, on Pcls- palum znrgatum (?) Utuado, 8075, on Arthrostylidium sar^ mentosum, Utuado, 4388. Phyllachora perforans (Riehm) Sacc & Syd. On Securedoca virgata, Mayaguez, 7402, Rosario, 9491, Maricao, 8981. Specimens previously reported by Garman as on Abrus were on this same host. Phyllachora scleriae Rehm. On Scleria pterota Sabana Liana, 9370. The specimen agrees well with the description given by Theissen and Sydow. The differences between this species and P. cypri Rehm are not large. Sphaeriales Sphaeriaceae Phaeospora Zopf P. cacticola sp. nov. Spots 5-10 mm. long, entirely or partially encircling the stems, surface wrinkled, thickly covered with perithecia. Peri- thecia subcuticular, 80-150 /t in diameter, black, ostiolate and erumpent when mature. Asci oblong to elliptical, 60-75x13-25, thin-walled, 4-spored, inordinate. Spores elliptical to oblong, obtuse, 3-septate. dark when mature, 34-37x9 /*. 1. Host determined by Mrs. Chase. 178 ILLINOIS ACADEMY OF SCIENCE Fig. 5. Corynelio clavata, var. portoricensis var. nov. (a) Habit sketch showing colonies on leaf. (b) Perithecia showing the two-lipped apex. (c) Asci showing irregular form and variable numbers of spores. Drawn by J. Maclnnes, PAPERS ON BOTANY -^"^ diameter, thick walled, dark, smooth, 1 -celled. Conidia oblong- fusoid; otherwise as in the type. On Podocarpus coriaceous near Maricao. 784 (type,) 810, 6713, 6722, 3576, 4363, 8858, 5820. This differs from C. clavata (L.) Sacc. which is reported on P. thunbcrgii, P. elongata, and P. totarae, in its narrower asci, larger spores, and few-spored ascus, and from the other forms of Corynelia, C. clavata var. macrospora Syd. on P. milanjiani, C. arcophila (Speg. ) Starb, on Podocarpus sp., C. carpophila Syd. on Rapanea in size of spores and ascus and number of spores per ascus. Corynelia pteridicola sp. nov. Fig. 6. Spots from less than a millimeter to 3 or 4 mm. in diameter, fungus usually though not always hypophyllous. Stroma small, 0.5-3 mm. in diameter, the central part falling out with age and the stroma thus becoming annular. Perithecia numerous, soli- tary on long stalks which arise from the stromata. Perithecial stalks about 500 /a long, 60 /^ thick, sporogenous region about 160x95/x, beak extending about 200-300 /x beyond the sporo- genous region. Perithecial stalk hairy with brown mycelium, 10-45x3 /A, sporogenous region and beak glabrous. Total di- mensions of perithecial structure 900-1090x60 /x. Asci, thin- walled, irregular in shape, 8-spored. 20-27x7 fi. Spores spher- ical, dark, 1-celled. 4 /* in diameter. On Campy loneurum sp. Anasco, 3551. The species differs markedly from other Cor^'nelias in the size of its spores and in its long-stalked perithecia. All the leaf tissue in a minute circular area is consumed and replaced by the fungus forming a stroma. From this arise numerous stalked perithecia. The central part of the stroma after sporing drops out, leaving only the opposite epidermis, or often a hole. The cavity thus formed in the leaf is surrounded by a ring-shaped stroma the thickness of the leaf or a trifle thicker and less than half a millimeter in breadth. This con- tinues to produce stalked perithecia, advancing into new tissue and falling aw\iy in the older portions, thus a diseased spot a few days old is a hole surrounded by the ring of stroma which bristles with the numerous black, stalked perithecia. 180 ILLINOIS ACADEMY OF SCIENCE Fig. 6. C. pteridicola sp. nov. a. Habit sketch showing spot of young growth and a hole sur- rounded by the stromatic border and giving rise to perithecia. b. Sketch to show perithecia arising from the stroma. (iff/f^^ c. Stalked perithecia, the swollen part bears the sporogenous cavity. Drawn by J. Maclnnes. PAPERS ON BOTANY 181 On Rhifysalis cassytha, Monte de Oro near Cayey, 5662 (type). This fun,^us is remarkable f(jr its very coarse, dark mycelium 7-9 At in diameter, and for tlie manner in which the mycelium penetrates vertically throu.<4"h the thick cambial layer. Herpotrichia I^\ickel. Herpotrichia difftisa (Schw.; Ellis and Ev. On cocoanut debris, Espinering toward the ends. On Rhynchospora cyperoides, Martin Peiia, 9302 (type). Guignardia cephalariae (Aud.) var. alternantherae Sacc. On Alternanthera sessilis, Mayaguez 7554, 9360, 49, 834, 3933, Rio Piedras, 9464, Las Marias, 8188, 8193, 7031, Utua- do, 4577, Guayanilla 5913. Pleosporaceae Physalospora Niessl Physalospora caryophyllinicola sp. nov. Hypophyllous. Spots abundant, especially upon the lower leaves, closely studded with the black perithecia. Perithecia sub-epidermal, globose, 60-110 /t in diameter, ostiole 20 m- dark-bordered. Asci cylindrical, 25x8 /a, 8-spored. Paraphyses filamentous, guttulate, thin. Spores 20x5 fi, oval with one side slightly more convex than the other, guttulate. On Drymaria cordate (L.) Willd. Jayuya, 5937, Physalospora lagunctdariae Rehm. On Lagiincularia racemosa, Guanica, 363, Boqueron, 367. It causes characteristic spots and is especially abundant on seedlings and cotyledons. The spores are slightly smaller than indicated by Rehm's description and are not clearly fusiform as he describes and figures. Physalospora andirae sp. nov. Spots conspicuous both above and below, tan colored, ir- regular in shape, rather definitely bordered. Thickly set with PAPERS ON BOTANY 18S pcrithecia which open below. Perithecia sub-epidermal, fin- ally erumpent, tan-colored. Each perilhecium surrounded by a delicate dark circle about 0.5 mm. in diameter. Asci thin- walled. 8-spored, 54-68x7 /*, spores uniseriate or inordinate, one-celled, oval, hyaline. Paraphyses many, filamentous. On Andira janiaiccnsis, Camuy, 7277 (type). Mayaguez, 1037, 1479, 3939. 3950. Vega Baja, 461, 492, 465, San Se- bastian, 5198, Maricao. 3628, Cabo Rojo, 6485, Coamo, 842, 8357. 8478. Quebradillas. 4999, Horniigueros, 218, San Ger- man. 5808. 842. Lajas. 7178. Tanama Rio. 7835, Arecibo- Lares Road, 7294. Martin Pefia. 9315, Pefiuelas 9163. Sta. Catahna. 2721. This form is exceedingly common on Andira and has more the general aspect of insect than fungous injury. It is exceed- ingly well defined and easily recognizable. Physalospora bainhusac (Rab. ) Sacc. On iMsiacis sorghoidca, Luquillo Forest, 5427. /'. luaculans, Sacc. & Troller, on Cyperus and P. pcmici on Pan i cum are close to the above. CUCURBITARIACEAE Nitzschkia Otth. Nitzschkia nervincola Rehm, On Gesneria albi flora. Maricao. 3670. 1002. 8917, 207, 735. 3498. 6718. Mayaguez. 7495. 7496. 6725. Otth i a Nits Otthia panici sp. now Stromata black, linear. 60 /^ wide. 1 10-470 p. long or some- times much longer, erumj^ent. crustose. bearing several peri- thecia. Perithecia imbedded in the stroma, ostiolate. Asci, long-cylindrical, monostichous. spores dark, 1-septate. 7-9x3 fi On Pariicitiii ina.viiinmh, Jayuya. 5^4. Preston's ranch. 6659 (type.) 186 ILLINOIS ACADEMY OF SCIENCE Pleosporaceae Metasphaeria Sacc. Metasphaeria abortiva. sp. nov. Fig, 7. Spots 3-5 mm. in diameter, circular, pale, conspicuous from both sides of the leaf, center black, bearing one perithecium or occasionally more than one. Perithecium black, 470-630x 40-50 fi, subcuticular, rupturing hyphophyllous, asci thin-walled, irregular in shape, 68x27 m, 8-spored. Spores inordinate, 31x7 /*, 2-septate, hyaline or very faintly colored. Central cell smaller than terminal cells and apparently abortive. On Varronia alba, Mayaguez, 304 (type), 6782, Maricao. 3457, 3465, Arecibo-Lares Rjoad, 7315. Fig. 7. Metasphaeria abortiva. Asci with eight 3-septate spores and single spore, showing the smaller apparently abortive central cell. No. 7315 (type). Drawn by J. Maclnnes. Leptosphaeria Ces. and de Not. Leptosphaeria sacchari V. Breda. On cane, Aiiasco, 3555. Ophiobolus Riess Ophiobolus barbatus Pat. & Gaill. On Vitex, 823. The ascigerous stages of this fungus were not seen but the very remarkably shaped conidia (text fig. 8) which agree precisely with those of Patouillard & Gaillard describe^l from Venezuela (Built. Soc. Myc. de Fr. 4: 114, PAPERS ON BOTANY 187 1888 and T. IV PI. XIX, F. 7b) indicate that the conidial form in the two instances are the same. In my specimens the term- inal cells were hyaline, the other cells dark and the component parts of the spore were either 4 or 5-septate. Melanconidiaceae Melanconis Tul. Melanconis sacchari Mass. On Saccharum officinale. Mayagnez (Fawcett.) Fig. 8. Opiiiobolus barbatus A conidium showing pale end cells and dark central cells and the peculiar grouping in pairs in which they always occur, 823. Drawn by J. Maclnnes. DiATRYPACEAE Diatrype Fries. Diatrype stigma (Hoffm.) Fries. On dead wood, Martin Pefia (Johnston), 4974. Melogram m at ace ae Endothia Fr. Endothia parryi (Farl.) Cke. On Fourcroya hexapetala, Indiera Fria Maricao, 216, 3494, Maricao 3496, 281. 2337, 8822. 7177. Trujillo Alto 9406. Endothia longirostos, Earle. Santurce. 4340. Xylariaceae Nummularia Tul. Nummularia bulliardi Tul. On rotten wood, Rio Piedras, (Johnston), 4669. Hypoxylon Bulliard Hypoxylon annulatum (Schw.) Mont. On dead wood, Palo Seco (Stevenson), 2989. 188 ILLINOIS ACADEMY OF SCIENCE Ustulina Tul. Ustulina vulgaris Tul. On Citrus aurantium, Palo Seco (Stevenson,) 3429. Daldinia de Not. Daldinia concentrica ( Bott. ) Cet. and de Not. On rotten wood, Palo Seco (Stevenson), 3381. Xylaria Hill Xylaria hypoxylon, (L.) Grev. Cabo Rojo, 2290. Xylaria poly morpha, (Pers. ) Grev. Mayaguez, 3017. Xylaria sp. Monte Alegrillo, 1414. Kretzschmaria Fries. Kretzschmaria coenopus (Mont.) Karsten. On rotten wood, Aibonito (Stevenson), 5020. Basidomycetes Hemibasidii ustilaginales Ustilaginaceae Sphacelotheca de Bary Sphacelotheca panici Icucophxisi (Bref.) Clint. On Valota itisularis, Aibonito, 40: Manati. 4297. Coamo Springs, 8568. Cintractia Cornu Cintra-ctia axicola (Berk) Cornu. On Fimbristylis, Ouebradillas. 5033, Bayamon, 1881, May- aguez 5821. On FimhristvUs diphylla, Sta. Catalina. 668. 5818, San Juan, 4538, Santurce. 5729, "l798. 1874, Ouebradillas, 5132. Lares 834, Rio Piedras (Stevenson). 2179T Cintractia leucodennxi. (Berk.) P. Henn. Catano, 5782. Luquillo Forest. 5610. Manati. 5254. on Rhynchospora sp. PAPERS ON BOTANY ^** Mayaguez, 836, Catano, 4090, Pueblo Viejo (Stevenson), 3985. On Rhynchospora corymbosa, Mayaguez, 836, Catano 5254, Rio Piedras, 9277. Cintractia limitata, Clint. On Mariscus ligularis, Manati, 5309. On Cy penis ligularis, Boqueron, 4854, Mayaguez, 1850, Santurce, 1852. Cintra<:tia utrictilicola (P. Henn.) Clint. On Rhynchospora corymbosa, Mayaguez, 1061a. On Rhynchospora aurea, May- aguez, 6783, 836a. Ustilago Rouss Ustilago affinis, E. and E. On Stenotaphrum secundatum, Arecibo, 1758, Bayamon, 1891, Ponte Santiago, 2458, 5*. herm- aphroditum, Rio Piedras, 7604. Ustilago 2eae, (Beck.) Ung. On Zea mays, San German, 5812. TiLLETIACEAE Burrillia Setch. BurrilHa echinodori, Clint., on Echinodorus cordifolms, Guanica, 335. Uredinales pucciniaceae Puccinia Pers. Puccinia hydrocotyles (Link) Cook. On Hydrocotyle ausfralis (Stevenson), 3979. Puccinia huberi. On Panicnm uto^cvanaeum, Mona Isiland, 6348. Cerotelium Arth. Cerotelium conciraliae. On ConavaUa gladiafa, Rio Piedras. 9278. 9504. 190 ILLINOIS ACADEMY OF SCIENCE Botryorhiza W. & O. Botryorhiza hippocratae W. & O. On Hippocratea voluhiUs, Rosario, 321, Ciales, 29, Maya- guez, 1714, 3915,, Vega Baja, 1195, 2504, 514, Monte Ale- grillo, 4721a, Luquillo Forest 5560, Mayaguez, 284, 1195, 1198, 1010, 3915, 1205, 4721, 7033, San German, 7513, 7520, Mayaguez, 7470, 7590, Joyuda, 915, Maricao, 4721. AURICULARIALES Auricularia Bull. Auricularia auricula (L.) Murrill, 113, 7004. Auricularia delicata, Mayaguez 2960, Monte Alegrillo, 2321. d acr yo m y cet ales Dacryomycetaceae Guepinia (Fries) Guepinia spathularia (Schw.) Fr. 1605. (Guepinia palm- iceps) Luquillo Forest, 5564. Eubasidii Agaric ALES Hypochnaceae Hypochnus Ehrenb. Hypochniis rubrocinctus. Ehbg., 1619. Thelephoraceae Peniophora Cooke Peniophora cinerea (Fr.) Cke. On Citrus decuniana, Espinosa (Stevenson), 5087. Corticium Pers. Corticium salmonicolor, B. & Br. On Citrus sinesis, Pueblo Viejo (Stevenson), 5436. Corticium lactescens, Berk. On rotten wood, Rio Piedras (Stevenson) 3357. PAPERS ON BOTANY ^^^ Corticium partentosum, B. & C. On rotten wood, Campo Alegre (Stevenson), 3597. Stereum Pers. Stereum tuberculosum Fr. On rotten wood, Rio Piedras( Stevenson), 3360. Stereum fasciatum Schw. On rotten wood, Rio Piedras (Stevenson) 1937. Stereum lohatum Kunze, 7000. Hydnaceae Irpex Fries. Irpex lacteus Fr. On rotten post, Bayamon (Stevenson), 5360. POLYPORACEAE Daedalea Pers. Daedalea amanatoides, Beauv. 1611, 1877, 2100, Monte Ale- grillo, 2316, Cabo Rojo, 6460. On rotten wood, Rio Piedras (Stevenson) 3359. Trametes Fries Trametes havannensis (Berk. & Curt.) Murrill, 449. Hexagona Pollini Hexagona daedalea (Link) Murrill, 2022, 2034, Monte Alegrillo, 625. Hapalopius Karst. Hapalopilus licnoides (Mont.) Murrill, 425, Indiera Fria. Maricao, 3401. Hapalopilus gilzms (Schw.) Murrill, Maricao, 2118, 1566. Inonotus Karst. Inonotus corrosus Murrill, 1820. On dead wood, Sardinera, Mona Island. 192 ILLINOIS ACADEMY OF SCIENCE Irpiciporus Alurrill Irpiciporus lacteus (Fries) Murrill? No. 91. Coriolus Quel (Type Poly poms zonatus Fr.) Coriolus hollickii, Murr. Monte Alegrillo, 4760. Coriolus pinsitus, (Fr.) Pat. Utuado, 4400, 760, 405, Mona Island, 1715, 450. 2101, 1608, Monte Alegrillo, 2315, Vega Baja, 1847, Riio Piedras (Stevenson), 5426c. Coriolus versicolor, (L.) Quel. Mayagiiez, 2179. Coriolus membranaceus (Sw. ) Pat., 2171, Monte Alegrillo, 2304, 1219, 1242, 92. Coriolus drummondiif (Klot.) Pat., 2051. Coriolus ochrotinctelhts, (?), Murrill, 2355. Coriolus pavomus (Hook.) Murrill, 1217, 1239. Coriolus maxinms (Mont.) Murrill, Cabo Rojo, 2098, 2099, 1240. Coriolopsis Murrill (TypQ Polyporus occidentalis Klot.) Coriolopsis rigida (Berk. & Mont.) Murrill. 1414, 1696. Coriolopsis occidentalis (Klotzsch) Murrill, 1238. Coriolopsis crocata (Fries) Murrill. 2011. Microporellus Murrill (Type Poly poms dealbatus B. & C.) Microporellus dealbatus (Berk. & Curt.) Murrill, 570. Rigidoporus Murrill (Type Poly poms tnicromegas Mont.) Rigidoporus surinamensis (Miq.) Murrill, El Alto de la Bandera, 1614, Monte Alegrillo, 2302, Rio Piedras (Steven- son) 5426b. 193 PAPERS ON BOTANY Gloeophyllum Karst. (Type Lenzites saepiaria Ft.) Gloeophyllum striatum (Sw.) Murrill, 2505, 2102. On dead wood, La Ramona. (Johnston), 4879. Favolus Beauv. Favoliis mbpuh'cnilcntus Berk. & Curt. 1237, Monte Ale- grillo, 2311, 2320. Fomes Gill. Fomes auberianiis (Mont.) Murrill, 1816, Maricao, 1916, 1216. Elfvingia Karst (Type Fomes applanatus (P.) Gil.) Elfvingia fasciata (Sw.) Murrill. 1558, Monte Alegrillo, 2318, 2307, 406, 1215. 1213. 2121, 2119. Elfvingia tornata (Pers.) Murrill. 1610, 2130, 2120, 1607, 1622, 2124. 762. Pyropolyporus Murrill Pyropolyporiis dependens Murrill. On dead wood, Mona Island, 1819. Pycnoporus Karst. (Type Boletus cinnabarinus Jacq.) Pycnoporus sanguineus (L.) Murrill. On dead wood. Mona Isand. 1876. 1754. 3891, 446, Afiasco, 3538. Rio Piedras (Stevenson), 319. Pogonomyces Murrill (Type Boletus hydnoides Sw.) Pogonomyces hydnoides (Sw.) Murrill. 1305, 1235, 2117, 547. 2098. 7003. Monte Alegrillo. 1411. Mona Island. 1688. On rotten wood, Espinosa. (Stevenson), 2749. Agaricaceae Schizophyllus Fries Schizophyllus alneus (L.) Schr. Maricao, 4909, Mona I»- 194 ILLINOIS ACADEMY OF SCIENCE land, 6417, Monte Alegrillo, 1359, 2309, Catafio, 1919, El Gi- gante, 1617, 195, 1567, 1846,, Mona Island, 1687, 1849. On dead palm log, Bayamon, (Stevenson), 389. Lentinus Fries LenHnus crinitus (L.) Fr. On rotten wood, Rio Piedras, (Stevenson), 367. On dead wood, Mona Island, 1878, 111, Cayey, 2927, 1606, 1565. Lentinus hirtus (Fries.) Murrill, 7002, 1338, Sierra de Lu- quillo, 2764, 1613,2118, 1605. Lentinus strigosus (Schw.) Fr. Cabo Rojo, 6466. Lentodium Morg", Lentodium squamosum (Schf.) Muirill. {Lentinus lepi- deu-s), 2020. Lepiota Fries Lepiotarubrotinctaf Pk. 1306. NiDULARIALES NiDULARIACEAE Cyathus Haller Cyathus roeppigii Tulasne On bamboo post. ( Stevenson ) . 5 1 50. Cyathus sp. Cabo Rojo, 6488. Fungi Imperfecti Sphaeropsidales Sphaerioidaceae Darluca Cast. Darluca filum (Biv. ) Cast. On Puccinia eleocharidis on Eleocharis, Mayaguez 481 ; on Puccinia rizHnae on Riz*ina hunvidus, Desecheo Island, 1590; on Kuehneola gossypii on Gossypium barbadense, 5226 ; on Pnc- 191 PAPERS ON BOTANY •'''■ cinta cannac on Canna, 4168. 3610, 6292. San German 4168. On Uromyccs leptodcrmus on Lasiacis divaricata, 4608, 4677, 6089, 447^ 4793 ; on Panicum harbinodc, 3953 ; on Uredo aes- chynonvenis on Aeschynoniene americana, 3945 ; on Puccinia huberi on Panicum trichoides, Jayuya, 5981 ; on Puccima subs- triata, on Eriockloa sub glabra. Mayaguez 481. On Puccinia gouania^, Utuado. A paraphysate, 8-spored ascomycete was found associated with the Darluca but was in such condition that it could not be determined. Phyllosticta Pers. Phyllosticta lantanae sp. nov. Spots small 1-3 mm. in diameter, white above, tan colored below. Pycnidia 140 /a in diameter, ostiole 15-17 /x. Spores oblong, 7x2 /x. On Lantana odorata Desecheo Island. 168, (type), Mona Island, 6416. 6440. Utuado. 6592, Guanica, 332. The spore size is in close agreement with that of P. get Bres. but it does not agree with this in other regards. Phyllosticta clusiae sp. nov. Spot large, 5 cm. or more in diameter, pale, border definite. Pycnidia numerous, scattered profusely over the blanched area, epiphyllous. sub-cuticular, enimpent, 110-140 /i in diameter, black, ostiolate. Conidia oblong-elliptical, obtuse, continuous, hyaline, 10x5 /*. On dead leaves of Clu^ia rosea, Maricao, 739a (type). It differs essentially in characters of the spot from P. ar- throphylli Koord., which is the only species with which it shows agreement in size of spores. Phyllosticta s^iperficiale sp. nov. Pycnidia straw colored, 68x94 /x in diameter. Ostiole 7 tt-'m diameter, dark bordered. Pycnidia entirely superficial borne on the hyaline mycelium among the surface hairs of the host. Spores somewhat irregular, oblong, 4-5x1.5 /*, hyaline, con- tinuous. 1*6 ILLINOIS ACADEMY OF SCIENCE On Passifora sexflora, Ponce, 4337 (type), 4377. Monte de Oro. 5736. The following numbers of the same hosts were in a spot of the same general appearance, but no pycnidia were found. El Consumo, 885. Adjuntas, 5822, Utuado, 4383, 6611, Luquillo Forest, 5557, Monte de Oro, 5674, Jajome Alto, 5686, Maricao, 880, 3466, 198, 4765, Guayama, 848. PhyllosHcta hyhiscina E. and E. On Abutilon umbellatum, Mona Island, 6120. Septoria Fries Septoria fici-indicae Vogt. On Opuntia dilenii, Guanica, 396. Sta. Isabela, 6825. The spores are slightly larger (34-37 /i) than the descrip- tion calls for (24-28/a), and are clearly septate. .a Septoria petroselini var. apii. On Apium graveolens, Maricao, 3416. El Gigante 8517, Aibonito 8454. Septoria mikaniae Wint. On Mikania sp. El Gigante, 8538. Septoria lycopersici Speg. On Lycopersiciim esculentum, Rio Piedras (Stevenson), 3955. Cicinnobolus Ehr. Cicinnoholus cesatii D. By. On Erysiphe polygom (?) On Cassia toro, San German, 5802, on Cassiu occidentalis, Guayama, 5330. Phomopsis Sacc. P homo p sis vexans Harter. On tgg plant, Rio Piedras (Stevenson), 3953. Phomopsis citri Faw. On Citrus decumana, Rio Piedras (Stevenson), 3615. PAPERS ON BOTANY lf7 Cytosponi Ehrenb. Nectrioidaceae Aschersonia Mont. Aschersonia aleyrodis Web. On Psidum guayava, Mayaguez, 6643, 493, 6362, Jayuya, 3120a. Utuado,'66i5, Rio Piedras (Johnston), 4360. Aschersonia cubensis B. & C. On Zamia integrifolia, Sta. Ana, 6674. On scale on Citrus (Stevenson), 2649. Fungi which closely resemble the above but of which specific determination could not be made were found on : Miconia, Vega Alta, 4155; Palicourea, Manati, 4279; We- delia, Vega Baja, 1928; Rondeletia. Maricao, 870; Gesneria, Maricao, 1002, 4670; Paullinia, 1207; Pilocarpus, Mayaguez, 7080; Inga, Mayaguez, 7474; Ocotea, Jajome Alto 8428, Vega Baja, 509; Blechnium, — ; Pavonia typhalaea, Mayaguez, 7400 Melasmia Lev. Melasmia coccolohiae sp. nov. Stromata hypophyllous, circular, about 2 mm. in diameter, black, each bearing several conidial cavities, strictly superficial but with the mycelium extending deq) within the leaf. Pycnidia approximately circular, 60-90 m in diameter, the base colorless and thin, resting on the cuticle, the pycnidial cavity covered by a thick, black, fungous cover. Conidiophores short. Conidia hyaline, continuous, acute at one end, rounded at the other, 8-10x2 M. On Coccolobis, Maricao. 3712 (type). Melasmia ingae sp. nov. Spots circular, visible above and below ; from above 2-3 mm. in diameter, centers filled by a black stroma 1-2 mm. in di- ameter, border definite; from below black stroma surrounded by a pale zone 1-2 mm. broad. Stroma bearing several spore cavities mostly located at its margin. Mycelium pemieating the leaf tissue in the disejised region. Stromata subcuticular 198 ILLINOIS ACADEMY OF SCIENCE forming first under the upper epidermis, less frequent under the lower epidermis. Rupturing irregularly, no ostiole. Con- idiophores short, parallel. Conidia irregularly oblong, taper- ing slightly to each end, continuous, hyaline to very pale straw- colored. Maximum size 24x5 /x.. Numerous small apparently immature spores, 2>yi7 ii, issue from the spore cavities. On Inga laurina, Las Marias, 423. These fungi are referred to the form genus Melasmia with- out intending to imply that they are ascigerous forms of Rhytizma. Melanconiales Melanconiaceae Gloeosporium Desm. & Mont. Gloeosporiuin manihot Earle. On Manihot manihot, Rio Piedras (Stevenson), 5134. Gloeosporium violae B. & Br. On Viola (cult), Mayaguez, 6305. Colletotrichum Corda Collctotrichum lobeliae sp. nov. Spots numerous, scattered over the leaf. 2-3 mm. in diam- eter, or by coalescence large, dark to purplish above, below tan- colored and raised blister-like : border definite. Acervuli hypo- phyllous, scattered over the diseased tissue. Setae numerous, scattered, 136 /* long, 6 /^ thick at base, several septate, taper- ing, obtuse, black. Spore cylindrical, somewhat irregular, ob- tuse, continuous, hyahne, 17-31x5-6 m, mostly the larger size. On Lobelia assurgens var. portoricensis, Maricao, 776 (type) 3513. Colletotrichum lindemuthianmn (Sacc. & Mag.) B. and Cav. On cultivated beans, Rio Piedras (Stevenson), 3879. Colletotrichum gloeosporioides Penz. On grape fruit leaves, Pueblo Viejo (Stevenson), 5003. Colletotrichum piperis sp. nov. PAPERS ON BOTANY ^^^ Spots circular, 1-3 cm. in diameter, older portion dark and strongly marked by a series of concentric lines about 1 mm. apart; this older portion surrounded by a zone several milli- meters wide of pale, evidently diseased leaf tissue. The oldest parts of the spot crack and portions fall away. Acervuli amphi- genous, numerous, scattered throughout the darker portion of the spot, small, mostly 45-80 /* in diameter, thickly set with se- tae. Setae in many cases growing solitary or in groups, but without conidiophores. Setae 70.85 m long, black, tapering ob- tuse. Conidiophores rather long, hyaline. Conidia oblong, obtuse, 17-27x7 /*, continuous, hyaline. On Piper umhcllatum. Caguas, 288 (type), 291a. This fungus is remarkable for the small size of its acervuli which in many cases consist merely of two or three setae and an equal number of conidiophores or indeed in many cases of solitary setae without conidiophores, though a sufficient num- ber of larger acervuli occur to show relation to the genus Colletotrichum. The fungus appears to be aggressively par- asitic. Colletotrichurn omnivorum Hals. On Pandanus sp. (cult.). Caguas, 290a. The setae are not universally present. Colletotrichum curznsetiun sp. nov. Spots circular, ashen at center, dark bordered. Acervuli variable. 30-80 /x in diameter with from 1 to 20 setae, often sterile, setae black, septate, acute, gracefully curved. Conidia oblong, obtuse, 17x5 m. slightly smoky. On Hura crepitans, Afiasco. 3594, Mayaguez 5830, asso- ciated with Cercospora hurae and with a pycnidial fungus. The spots usuallv l^ear Ixnh the Colletotrichum and the Cercospora. The Colletotrichum is quite frequently sterile, the acervuli then consisting of merely setae or setae connected by a dark subiculum. Colletotrichum erythrinae E. & E. On Pithecolobium unguis-cati. 200 ILLINOIS ACADEMY OF SCIENCE Coamo, 3973, 129, Boqueron, 4876, Guanica, 337a, 354a. Guanajibo, 8585, Mona Island 6137, 6094, Boqueron, 4876, Desecheo Island, 1576. The fungus is evidently aggressively parasitic. The spots are quite characteristic and readily separable by the naked eye from the various other spots on this host. Colletotrichuni philodendri P. Henn. On Philodendron krebsvl, Arecibo-Lares Road 7226. Rio Tanama, 7849. I place this specimen under this name though there is not complete agreement with description. The acervuli are very large, 150-240 z^, much larger than description calls for. the setae, too, are obtuse, not acute. Pestalozzia De Not. Pestaloszia palmarum Cke. On Cocos nucifera, Rio Piedras (Stevenson), 2220. Pestalozzia coccoloba^, Ell. and Ev. On Coccolohis uvifera, Boqueron, 339b. Pestalozzia funerea Desm. On Clusia rosea, Maricao, 739. On Miisa paradisica, Rosario, 3796, Barros, 122, on Citrus (cult.) Utuado, 6869a, on Acrista monticola, Luquillo Forest, 5553, on Poiuciana puklicrrima, Mayaguez, 3966, on Pithecolo- biuni unguis-cati, Mona Island. 6137, on Inga vera, Maricao, 205. on Chrysobalarmts icaco, Santurce 258. Melanconium Link Melancomum sacchari Mass. Sa^charium officinarum, Mayaguez, No. ? MONILIALES MONILIACEAE Acrostalagmus Corda Acrostalagmus albtis Preuss. On Aphis on pepper. Rio Piedras (Stevenson), 5608. PAPERS ON BOTANY *®^ Verticillium Nees Vcrticilliiim heterocladiitm i'enz. LaRamona (Johnston), 1018. Pellicularia Cooke Pellicularia kolcvoga Cke. On Coffca anibica, Mayaguez, 9488. Monosporium Bon. Monosporium urcdinicoluiii sp. nov. Mycelium floccose, byssoid, forming white, moldy spots 1-2 m.m. in diameter over each rust sorus. Hyphae hyaline, sep- tate, very sparsely dichotomously branched. Conidiophores in- distinguishable from the mycelium, simple or sparsely dicho- tomously branched. Spores acrogenous, solitary or rarely catenulate, 12-15 ^. hyaline, continuous, cylindrical, obtuse at each end. On Coleosporium ipomoeae on Ipomoea batatas, No. 6668 (type). Host determined by Dr. Arthur. This fungus was very common at the place of collection. A large field of sweet potatoes was badly rusted. Apparently every leaf in the field bore numerous rust sori and apparently every sorus was overgrown with this fungus. Its hyaline mycelium is found covering the sorus and growing in and around each rust spore. Trichothecium Link Cephalothecium Corda. Trichotheciuvi fiisarioides. Sp. nov. Colonies cottony, white, 2-5 mm. in diameter, surrounding the parasitized Phyllachora. Mycelium hyaline, septate, serile, mainly creeping. 2 fi thick, mainly branching at right angles. Conidiophores erect or ascending, long. 100 ft, and extremely attenuate, 1 a* at tip. septate, unbranched. Spores borne soli- tary but accumulating in bunches of 10 to 50 on the tips of the 202 ILLINOIS ACADEMY OF SCIENCE conidiophores, hyaline, 1-septate, fusoid, acute at each end, 13-20x2>^-3 /^. On Phyllachora peribebuyetisis Speg. on Miconia sp., Mar- icao, 3610. While this fungus bears some resemblance to C. macro- sporium Speg., it differs essentially from it in several char- acters, particularly in the shape of the spores. Diplosporium Bon. Diplosporium album Bon var. fungkolum. On Parodiella cayaponiae, Garman. On Cayaponia, Utuado, 4360. Blastotrichum Corda Blast otrkhum ndconiae sp. nov. Mycelium hyaline, forming white spots on under sides of leaves. Spot circular, indefinite, 2-5 mm. in diameter, pale to yellow above. Aerial mycelium abundant, creeping and branching profusely and irregularly, 3-5 fi thick. Erect my- celium mainly branching dichotomously, sometimes geniculate. Conidia 0-3-septate, falcate, acute, 17-30x3-5 m. Associated with and probably belonging to Borinquenia, on Miconia laevi- gata, Maricao, 4822. Utuado, 6871, 6862, Aguas Buenas 302. Separated from previously described species by its parasitic habit and its association with Borinquenia. (This is essentially a Fusarium without the sporodochium, i.e., having the conidio- phores of the Moniliaceae. ) Monogrammia gen. nov. Conidia on short, branched, hyaline conidiophores, one- celled, hyaline, with six lobes all in one plane. Monogrammia miconiae. sp. nov. Fig. 9. Mycelium hyaline, hypophyllous, in small, 1-5 mm., circular spots. Conidiophores short, usually simple; conidia adhering in clusters, hyaline, continuous, six-lobed, shaped like a mono- gram of the letters H. and I ; attached to the conidiophores by PAPERS ON BOTANY 203 Fig. 9. Monogrammia miconiae typically formed spores. Drawn by J. Maclnnes. one central extremity. Six)res 20-25x25-28 m, extreme meas- urements; minimum median 10-12 fi, median longitudinal 12- 15 /u. On Miconia, associated with Hyalosphaerm miconiae, Yabu- coa, 6705. This most peculiar form was found on only one collection, but in that the monogram- formed spores were present in great abundance. This collection is also one that gave Hyalosphaeria miconiae and it is quite probable, since the two were intimately associated, that they are really connected though such a sug- gestion cannot be entertained as a certainty merely on cir- cumstantial evidence. Dematiaceae Ellisiella, Sacc. EUisiella portoricensis sp. nov. Fig. 10. Hypophyllous. forming large, 0.5-4 cm., black, velvety spots, 204 ILLINOIS ACADEMY OF SCIENCE densely covered with the fungus. Conidiophores oblong, rounded, pale, base, angular, inverse radiate ; stalk 10 /x long, 5 /A thick, base 7 /* high, 10 /* in diameter. Sterile setae, very numerous, forming a velvety coat to the spot; black, simple, stiff, straight, 360 /^ long, 4 /a v^ide, cells about 14 /x long. Tip pale, acute; base dark, abruptly enlarged. Conidia hyaline or very lightly tinted, pyriform, 17x7 /*, round- ed at one end, acute-attenuate at other. On dead leaves of Clusia rosea. Arecibo. 6809 (type), Desecheo Island 1595, Lajas, 7136a, Hormigneros, 7348. Napicladium Thum. Napicladium fumago Speg. On Miconia, 6705, Arecibo, 6804. In dark, sooty, epiphyllous blotches. The spores agree well with the figures and measurements of Spegazzini. (Fungi Chilenses p. 190), but the number of septa is often as much as eleven with 3 to 4 more close septa at each end. The my- celium which is associated with it is also more beaded than in the figure of Spegazzini. Brachysporium Sacc. Brachysporium stemphyliodes (Cd. ) Sacc. On Aiioiia iiiontana, Mayaguez, 7561. The conidia measure only 20-24x14 /x, while the description of this species gives 35-37 m. This perhaps is a distnct variety or species. Alternaria Xees. Alternaria solani (E. & M.) T. & G. On Datura, Yauco, 3276. On Datura suaveolens, Barros, 151. Coamo, 88, Aguas Buenas. 305a. on Solanaceae, Jajome Alto 5690. Microclava gen nov. A Dematiaceous fungus with simple conidiophores which broaden out at the distal end and bear two, oval, dark cells. PAPERS OK BOTANY 20i Si ) •a • 'c -0:2 *^ o ^ 'o B :; .0 ^ o S fe bo /^ - j3 O IS 206 ILLINOIS ACADEMY OF SCIENCE Type M. miconia. Microclava miconia sp. nov. Fig. 11. Mycelium internal, hyaline, 3 m thick, septate, bearing many swellings, and small protuberances, branches arising at very obtuse angles. Conidiophores, simple, erect or ascending, straight, 30-100 /*, 2^ fi thick near top, tapering gradually to base, 2 fx, stipe about 4-septate, apex bearing 2 basal, straw- coloied cells and 2 oval dark cells. On Miconia laevigata. Aguas Buenas 302 (type). This fungus forms dense growths of conidiophores over the leaf surface, often associated with a Microthyriaceous fungus. Fig. 11. Microclava miconiae Hyaline mycelium with pale conidiophore and dark conidia. No. 303 type. Drawn by J. Maclnnes. though possibly not parasitic upon it. No close relative of this fungus seems to exist though it clearly belongs to the Dematia- ceae. Its relationship is probably with some such form as Triposporium which if two-spored and with each spore re- duced to one cell might simulate the condition here presented. Microclava coccolobiae sp. nov. Mycelium internal pale to brown. Conidiophores simple, about 70 /i. high, 3 /t thick at base, stipe usually unicellular. Upper part broadening gradually to 8 ^i in thickness, and con- sisting of three superimposed cells. On Coccoloba diversifolia, Maricao, 8877. Triposporium Corda Triposporium stelligerum Speg. PAPERS ON BOTANY 20T On Aguas Buenas. 302, on Kudolpliia voluhilis, Mari- cao, 5439, Luquillo Forest, 5439a, on I'iper, Maricao, 3371, on 7Mmia integrifolia, Monsallo, 9348. on Chiococca alba, Vega P>aja, 7743, on IVinteraita canclla, Guayanilla, 8548, on An- ona nioyitana, Mayaguez. 7561, on Myrcia deflexa, El Alto de la Bandera, 8268, on Didyniopanax, 1246, on Miconia, 6705. Tliis peculiar fungus agrees very closely, even in minute de- tails, with the South American form as described and figured by Spegazzini. , _. Passalora F. and Mont Passalora cercropiae sp. nov. Spots visible from above, below consisting of irregular, diffuse smoky blotches. 1-2 cm. in diameter. Conidiophores simple, smooth, black, over 600 h- long, slightly geniculate at the tip, 3 At thick. Conidia pale to black, oblong to clavate, apex obtuse, base often pointed. 2-celled, 2-27x3.5 t^. On Cecropia peltata, Arecibo, 7790. Cladosporium Link Cladosporinm calotropidis sp. nov. Spots circular. 1-5 cm. in diameter, indefinite border, gray- ish-black, equally visible above and below but more definitely bordered below. Conidiophores cespitose from the stomata, amphigenous but much more abundant above, occupying every stoma within the diseased area. Each conidiophore cluster consists of from 10-20 conidiophores. Conidiophores short, 20x35 /A thick, 7 ti, simple, obtuse, dark, crooked, 1 or more septate. Conidia oval to cylindrical. 1-2 or 3-celled, mostly 2-celled, brown, 20-34x7 /x. On Calotropis procera, Guayanilla, 9130 (type), 291. Cladosporium gimnicettsis sp. nov. Spots 1-5 mm. in diameter, roughly circular, definite, pale above, dark below. Conidiophore clusters hypophyllous, num- erous, dense, so close together as to nearly cover the leaf. Conidiophores about 75 h- long, yellow. Conidia yellow, 2- celled, oval, obtuse, 17-24x8 /i. 208 ILLINOIS ACADEMY OF SCIENCE On Argemone mexicana, Guanica, 347a, (type), Coamo, 620. Cladosporium herbarium (Pers.) Lk. On Canna coccinea, Villa Alba, 107; on Canna glauca, Utu- ado, 6006; on Canna Sp. Mayaguez, 3964, Aibonito, 8441. As- sociated with Puccinia cannae. This fungus is very common forming a sooty coating upon the leaves. So far as I have obser\'ed it is not present except where the rust is and may De dependent upon the rust for its early sustenance. On Conavalia obtusifolia Boqueron, 336a, forming a dense, sooty coating over the leaves. Cladosporium fulvum Cke. On tomato, Florida Adentro, 7660, Utuado, 8026, Tanama Rio, 7881, Cabo Rojo 3168, Cagnas 289a, Rio Piedras (Stev- enson), 3818. Cladosporium mikaniae sp. nov. Spots diffuse, indefinite, 1-2 cm. in diameter, tawny. My- celium abundant within and on the trichomes. Conidiophores hypophyllous, tawny. Conidia 34-48x3-4 /*, tawny, one-septate or occasionally with more septa. On Mikania, Las Marias, 314 (type). Cladosporium citri Mas. On Citrus sp., Bayamon (Stevenson), 2481. Helminthosporium Link Helminthosporium ravenelia Curt, and Berk. On Sporobulus ja-cquemontia, Rio Piedras (Johnston), 4205. Helminthosporium stahlii sp. nov. Spots small and irregular or large and diffuse, pale, above, dark below. Conidiophores numerous, lax, long, 155 /tt, crooked, straw-colored to yellow, quite dark in mass, simple or branched. Conidia very uniform in size, 24x6-7 /t, and shape, long-ellip- tical to pyriform, rounded at the large end and with a slight apicule at the small end, when young continuous, later 1 -septate and when mature usually 3-septate. 209 PAPERS ON BOTANY On Passiflora foctida, Luquillo 6 (type), Mayaguez, 1699, Preston's Ranch, 6670. In general the fungus is close to II. malic but is distinguished from it by the great regularity of its spores and the apiculate small end. Helminthosporium varroniae sp. nov. Hypophyllous. Mycelium superficial fine, 0.5-1 m, pale. Conidiophores dark, crooked, 4 /^ thick. 160x200 fi long, soli- tary and scattered or in small groups. Conidia usually 3-septate, pale straw colored, acute at each end, slightly constricted at the septa, 27-44x6-7 /x. On Varronia. Florida Adentro, 7663. This fungus is par- ticularly interesting because it closely resembles those Helmin- thosporiums which are so common on Meliola. This one is sufficiently different from them to be considered a separate species but near enough to show that it belongs in the same sub-generic group with them. Helminthosporium caladii sp. nov. Spots circular or oval, often 1.5-2 cm. in diameter; centers ashen-white, borders tan-colored. Clusters of conidiophores numerous throughout the diseased area, each consisting of many, usuallv more than 20, conidiophores. Conidiophores very crooked, long, 85 /*, pale yellow. Conidia oblong to cvlindrical. obtuse, pale straw colored. 3-septate when mature, 27-41x7 M. On Caladimn bicolor Mayaguez, 3860 (type), 75, 252, 292, 7587. 7401, Manati 4327, ' Afiasco 8691, 3220, Rio Piedras (Stevenson) 386. The spot produced is quite characteristic and gives evidence of the aggressive character of the parasite. The fungus is distinctive owing to its numerous long, crooked conidiophores. It differs from Cercospora Caladii Cke. in septation and size of spores. Helminthosporium spiculiferum E. & E. On Thrinax. near Utuado. 6616. 210 ILLINOIS ACADEMY OF SCIENCE Helminthisporium raz 'enelii. On Sporpbolis indicus El Alto de la Bandera, 8663, Jajome Alto, 8404. This "smut grass" is very common throughout the island. Helminthosporhtm glabroides Stev. On Perisporium portoricense ; on Calophyllmn calaba, 7489. CercosfKDra Fries. Cercospora violae Sacc. On Viola sp., Rio Piedras (Stevenson), 5125. Cercospora rigospora Atks. On Solamtm nigrum, Rio Piedras, (Stevenson), 5316. Cercospora personata (B. & E. ) E. On Arachis hypogaea, Rio Piedras (Stevenson), 5121. Cercospora iiicotiaiia E. & E. On Nicotianum tobaccum, Bayamon (Stevenson), 5517. Cercospora citrullina Cke. On Citrullus vulgaris, Pueblo Viejo (Stevenson). 5446. Cercospora hurae sp. nov. Spots circular or sometimes angular by venous limitation, 2x0.5-1 cm. in diameter, ashen in center, purplish border, with numerous concentric lines marking the dead leaf tissue visible equally from both sides of the leaves. Conidiophores amphi- genous but much more abundant below, emerging from the stomata in small or large clusters, straw-colored about 35 n long, geniculate. Conidia linear, many-septate, 50-85x3-4 n, straw colored, obtuse. On Hura crepitans, Mayaguez, 478, 5830 (type), 70, Afiasco 3594. Cercospora ricinella S. & B. On Ricinus sps. Jayuya, 5973, Yauco, 3238, Penuelas, 4889, Utuado, 6553, Coamo, 125, 60, 84. Cercospora hiformis Fetch. PAPERS ON BOTANY 211 On Passifora sex flora, Mayagnez, 1 140. Ccrcospora trichostig^nae sp. nov. Spots dertnite tan colored, angular, 3-10 mm. in diameter, Conidiophores hypopliyllous, arising from small black tuber- cular masses, short, dark Conidia oblong, cylindrical, obtuse at each cud, i)alc straw colored, 34x50x3 /a, many septate. On Tnichostigiita octandra, Barceloneta, 9254 (type), Rio Piedras. 9470. The conidiophores are so closely compacted as to make this a transition form l^etween the Moniliales and Tuberculariales. Cercosporia cuciirbiticola P. Henn. On Cayaponia Maricao, 4815. Rosario, 2>777 . The species of the two hosts which were not the same were not determined. Cercospora achyranthis Syd. On Achyranthis aspera, Guanica, 333, Hormigueros, 459a, Bayamon, 459. The type of this species was described from Japan and in some respects differs from the Porto Rican ma- terial, particularly in the length of the conidiophores and shape and character of the spot. Cercospora alternantherae E. & L. On Alternanthera portoricensis, Yauco, 3273, Coamo, 3976, 820. 8479. Cercospora gilbertii Speg. On Ircsinc panictilata, El Alto de la Bandera. 8286. This specimen differs from Spegazzini's description in that the spots are not pellucid, the spores too. are a trifle thicker. Ccrcospora hixae, A. & N. On Bixa orellana. Mayaguez. 56, Lares, 4845. Rosario, 3795. The last number also bears spots of entirely different character, small, with white center and purple border. In these is a Cercospora which appears quite different from C. hixac. On account of sparcity of material it is not described. Ccrcospora hiformis Petch. 212 ILLINOIS ACADEMY OF SCIENCE On Passiflora sexflora, Mayaguez, 1140. Cercospora trichophila sp. nov. Spots circular, dead, 3-5 mm. in diameter. Conidiophores hypophyllous, yellow, very long, lax creeping and twining among the leaf hairs of the host. Conodia long, many septate. 44-68x5 II. On Helicteres jamaicensis, Peiiuelas, 4888. On Solaniim toruum, Mayaguez, 361, 1144, 1266, Utuado, 4691, 7982, Vega Baja, 486, Rio Tanama, 9205, 7832, Mona- cillo, 9339, Arecibo-Lares Road, 7227, 7296, Mayaguez, 7036, Lajas, 7156, Manati, 7693, Mona Island, 6431. On Solanum verhascifolium, El Gigante, 8499, El Alto de la Bandera, 8260. The fungus has much the habit of a Cladosporium but the spores of a Cercospora. Cercospora flagellaris E. & M. On Phytolacca icosandra, Maricao. 2323. Cercospora portoricensis E. On Piper aductum, Mayaguez, 45a, 315, 1166, 7501, 7035, Pefiuelas, 9143, Juana Diaz. 9131, Martin Pefia, 9308, Coamo Springs, 8358, Tanama Rio, 7833, Jajome Alto, 8420, 1088, Arecibo-Lares Road, 7319, 7015, Anasco, 8735, Trujillo Alto, 9399, Penuelas, 9132, Adjuntas 463, Corozal 412, Ciales 22. On Piper iimhellatum, Maricao. 8854, 7903, Rio Arecibo, 7771. Cercospora caseariae sp. nov. Spots ashen white, irregularly circular, definite, 2-4 mm. in diameter, surrounded by a purplish area a centimeter or more in diameter. Conidiophores in loose clusters. Conidiophores short, reaching but little above the epidermis, Conidia linear to clavate, straw colored, many septate, 50x4 /*. obtuse. On Casearia ramiflora, Villa Alba, 99, Caguas, 292a, Lu- quillo Forest, 5556, Quebradillas, 5171, Utuado, 4691, 4675, 8051, San German, 4865, 5839, Catafio, 4190, Martin Pefia, 9306, Mayaguez, 3940, 211, Aguada, 5086, Aguadilla, 4858, PAPERS ON BOTANY 213 Maricao, 370, Martin Pefia, 9330, Vega Baja, 9268, Rio Tana- ma, 7925, Jayuya. x, Bayamon, 387, Preston's Ranch, 6698, Sta. Catalina'2720. On Casearia sylvestris, Mayaguez, 524, 3900, 76, 3895, Co- amo, 7275, Rio Tanama, 7884, 7855, Hormigueros, 7364, Lajas, 7177, Corozal. 406, Quebradillas, 5010, 5004, 7273, Ponce, 8682. Luquillo Forest. 5431, Monte de Oro, 5714. On Casearia guianerisis, Rosario, 3801, Corozal, 420, Maya- guez, 1386. The spots produced on C. sylvestris are much smaller than on C. ramiflora, usually only 1-2 mm. in diameter. These on C. guianetisis are intermediate in size. Ccrcospora thouiniae sp. nov. Spot indefinite diffuse, the diseased area showing above merely sHghtly discolored, below marked only by the ferru- ginous fungus. Conidiophores hypophyllous, abundant, long, lax, ferruginous smooth, crooked, slightly darker than the spores. Conidia. long, narrow, 58-72x5-7 /*, usually clavate, many-septate. On Thoiiinia striata, Maricao, 75 1 . Cercospora bernardiae sp. nov. Spots small, circular, 1-3 mm. in diameter. Yellow above, pale below, definite. Conidiophores epiphyllous in dense clust- ers, almost tubercular, short, about 35 ju. long, pale yellow. Conidia linear 51-68x7 /x., obtuse, 3-many septate; very faintly straw tinted. On Bernardia bernardia, Guanica, 355a. The fungus is especially interesting since its general aspect is not that of a Cercospora and on account of its almost tuber- cular habit. Cercospora uiikaniacola sp. Spot circular, small, 1-2 mm. in diameter, or by concentric enlargement. 5-10 mm. in diameter, sordid white in center, dark bordered, definite. Conidiophores hvpophyllous. cespi- tose, fascicles of many conidiophores. or often solitary. Co- 2^* ILLINOIS ACADEMY OF SCIENCE riidiophores pale brown, 6 /* thick, 50-100 /t long, or in old spots 160 /i long, geniculate. Conidia, linear to whip shaped, pale, 34-78x3.5 Ai. On Mikonia sp. Utuado, 7923, (type), Aguado, 5083, Mar- icao, 4700. Cercospora heticola Sacc. On Beta vulgaris, Rio Piedras (Stevenson), 5550. Cercospora henningsii Allesch. On Cassava, Bayamon (Stevenson), 3932. Cercospora atricincta. On Zinnia sp. Espinosa (Stevenson), 3130, Cercosporidium Earle Cercosporidium helleri E. Passalora helleri E. On Sphenoclea seylandica Mayaguez 3757. Stilbaceae Stilbella, Lindau Stilbella flavida ( Cke. ) Kohl. On coffee, Dos Bocas, 6565 ; Jayuya, 5975 ; Ponce, 4269 ; Monte de Oro, 5720; Rio Maricao above Maricao, 3637; El Gigante, 8488 ; Arecibo Lares Road, 7245. On Bryophyllum pinnatum, Maricao, 385. On Psychotria uliginosa, El Alto de la Bandera, 9047, on Elephantopus mollis, Jayuya, 467, Monte de Oro, 5740. On Piper macro phyllum Monte de Oro, 5734, 5722; on Synedrella nodiflora, Ponce, 4268. TUBERCULARIACEAE Microcera Desm. Microcera fujikuroi. On grapefruit, Pueblo Viejo (Stevenson), 5008. pai'f:rs ox rotan'v 21B Epicoccum Link Epiccoccuui ncglcctiDii. Desiii. On Cestrum, Cabo Rojo, 6451. The fungus is apparently parasitic. The sporodochia are large, 750 /* in diameter, 320 m high. The conidia are about 10 /x in diameter, slightly smaller than the description calls for. Pucciniopsis Speg. Pucciniopsis caricac Earle. On Carica papaya, Rio Piedras (Johnston), 1472. Illosporium Mart. lllosporium commcHnac sp. nov. Spot circular 1-2 cm. in diameter, discolored border indefi- nite. Sporodochia hypophyllous, one in nearly every stoma in the diseased area. Mycelium substomatal, ver\' fine, about 1 /u, hyaline, branched and crooked. Sporodochia nearly spher- ical but slightly flattened on the top and slightly wedge-shaped below as they contract to the stomata, waxy, pale, about 95 P in diameter. Conidiophores at first parallel, simple, about 35x1 /x. later growing out into long mycelium-like structures. Spores few, oblong, continuous, hyaline, obtuse, 10x3 /x. On Commclina elegans, Aguada. 5109, Mt. Gigante 8485, on Commelina longicaulcs, 5081, Caguas, 287a, Hormigneros, 224: Rosario. 480; Guayanilla, 5923; I^s Marias, 8248. This fungus is very common on its widespread host and is conspicuous in its effects and vigorously parasitic. Although the sporodochia are numerous, six)res are produced very spar- ingly. The sporodochia are distinctly waxy in texture, and when old have numerous long mycelial threads growing out from their upper surface. Mycelia sterilia Sclerotium Tode Sclerotium portoricense , sp. nov. Mycelium scant, hyaline, crooked, septate. Sclerotia super- ficial on leaves, culms, or leaf sheaths or more often under the 216 ILLINOIS ACADEMY OF SCIENCE Fig. 12. Sporodochium of Illosporium commelinae. Drawn by J. Maclnnes. leaf sheaths, 280 /a in diameter, flattened. Thickly set with long, 800-1000 /A, fine, 3 /i, brown, septate hairs which arise as outgrowths from the surface layer of the sclerotium. Surface layer of cells dark, firmly adhering. Internal cells hyaline, angular, 10-14 /a in diameter, consisting of a thick wall, 3-4 /x, and a central granular protoplasmic area. On Cynodon dactylon. Santurce 378 (type), also a specimen by Stevenson Dec. 1916. This structure is very remarkable and it is regrettable that more of the life history is not known. FUNGI OF UNKNOWN AFFINITY. Graphiola Poit. Graphiola phoenicis (Mong.) Poit. On Phoenix dactylifera, Mayaguez. 896. 3503, Coamo Springs, 8337; on Inodes cau^iarum, Jayuya 6731a, 3756; on Phoenix ( ?) Guanica (Smvthe) 2563 ; on Thrinax preceps, Utuado. 8017. PAPERS ON BOTANY 217 Fig. 13. Sderotium portoricense sp. nov. a. Sclerotium showing general appearance of sclerotium and the hairs, b. A bit of the surface layer showing reticulations. c. The hyaline internal cells showing thick wall and granular interior. d. Detail of one of the perithecial hairs. PARASITIC ALGAE Cephaleuros mr esc ens Ktz, On Psidium guajava, Mayaguez, 155, 5819; on Myrcia de- flexa, Mayaguez Mesa, 7436, Maricao, 5056; on Cupania americmuL, 9144; on Nectandra patents, 1750; on Miconia lae- zngata, Mayaguez, 7Z72) ; on Inga Imirina, Willd., Jajome Alto, 7023, Mayaguez, 7038, 7049; on Jambosa zndgaru, Anasco, 8743 ; on Artocarpus incisa, 196, 1222 ; on Coccolobis diversi- folia, Maricao, 8877 ; on Ocotea leucoxylon, Mayaguez, 7393 ; (>n ^[yrcia, Rosario. 4815 ; on Cestrum laurifolium; Mayaguez, 8158, 7088; on Dcndropanox arborcum, Tanama Rio, 7955; on Somideda lindeniana. Jajome Alto 8380 ; on Lasiacis sivarfziana. Jajome Alto, 5657, on Citrus sp. Mayaguez, 1017; 218 ILLINOIS ACADEMY OF SCIENCE on Citrus decumana, Rio Piedras (Stevenson), 2327; on Achras sapota, Rio Piedras (Stevenson), 3244. On Acrodic- Hdium salicifolium, Hormigueros 7360. Crustose lichens on leaves. Heterothecium phyllocharis. Renealmia antillarum, Maricao, 743. THE OCCURRENCE OF ALTERNARIA IN A CHAR- TERISTIC APPLE SPOT, AND AN APPLE ROT CAUSED BY GLIOCLADIUM VIRIDE By Frances Jean MacInnes The twenty-five apples on which this work is based came from Harristown, Illinois, early in July, and were not nearly mature. The spots were in various stages of development, making it possible to study the probable progress of the disease. Nothing is known of the conditions under which they grew, nor of the time the infection started. THE disease on THE FRUIT The spot on the fruit is striking in its early stages, due to the decided color change and in the later stages to the distinct margin as well as the darkened skin and tissue. The outer skin of the diseased portion is tough and leathery, and diffi- cult to cut. Only a few millimeters beneath the skin are in- jured. The disease does not destroy a large part of the fruit, but it is unsightly, and would largely decrease salability. The earliest stage of the disease showed no softening of the tissue or change in the size or shape of the fruit. A spot about 2 cm. in diameter was changed from green to a delicate yellow mottled wath red. A later stage showed a spot slightly darker and mottled with both red and brown. What was considered a still more developed spot possessed the same characteristics as those above but in the center was a slightly sunken irregular brown spot with a distinct border. This spot was shiny, hard, and from 2 to 4 mm. in diameter.