gb Field Columbian Museum— Botany, Vol. i. 



M. Saponariae Peck. 



On Saponaria officinalis, Oct. 6, 1894 {Nut (a/I, 1695). 



M. olivaceum E. & E., Proc. Phila. Acad., 1894, 383. 



Type habitat: Parasitic on Sphceropsis Asiniince on dead limbs 

 of Asimina triloba, March, 1894 {Nuttall, discov. 1418, 388). 



Forms a light olive velutinous coat over the pustules of the 

 Sphceropsis. Hj^phae tufted, yellowish brown (under the micro- 

 scope), septate, erect, nearly straight or subundulate, 80 to 100 

 X 4 to 5 ij.. Conidia obovate or obpiriform, 3 to 5-septate and 

 muriform, brown, 24 to 38 x 15 to 20 p. terminal, sessile. Co- 

 nidia also occur subcubical or subglobose 15 to 20 , a diameter with 

 2 septae crossing each other at right angles. 



M. antennseforme B. & C. 



On Celt is occidentalis, Aug. 11, 1894 {Nuttall, 1652). Conidia 



+ 95 X 15 !J.. 



M. sp. 



Type habitat: On pods of Datura Stramonium, Feb. 10, 1894 

 {Nuttall, discov. 1369, 326). 



M. Tomato Cooke? 



On ripe fruit Lycopersictun esciilentum cult. Spores shorter than 

 described. Sept. 9, 1893 {Nuttall, 1195). Same host Monon- 

 galia Co., at Morgantown, prevalent 1891 {Millspaug/i). 



M. Maydis C. & E. 



On leaves Zea Mays c\At. , with conidia smaller than described, 

 Nov. 1893 {Nuttall, 1334, 292). 



TRICH^GUM Corda. 



T. nodulosum E. & E., Proc. Phila. Acad., 1894, 385. 



Type habitat: On dead leaves Carex Fraseri, Feb. 11, 1894 

 {Nuttall, discov. 1373, 333)- 



Erumpent, tufted, becoming subeffused, black, tufts gregarious, 

 forming subvelutinous patches 2 to 4 mm. across, or when stand- 

 ing singly the hyphae and conidia forming a compact mass .5 to 

 I mm. diameter, and resembling somewhat the sorus of a Puccinia. 

 Hyphae simple sparingly fasciculate, brown, septate, often swol- 

 len at the septa, about 4//. thick and 200 to 300 /7. long. Conidia 

 near the base of the hyphae, at first elliptical, yellowish-hyaline, 

 uniseptate, 8 to 10 x 6 to 7 //, soon becoming 4 to 6-septate, muri- 

 form and opaque, 10 to 25 //. diameter, subglobose, obovate, or 

 elliptical. 



SEPTOSPORIUM Corda. 



S. Equiseti Peck, Rep. State Bot. N. Y., 1892, 25. 



Type habitat: Tips of living leaves Equisetiwi arve?ise, Dodd- 

 ridge Co., near Center Point, and Monongalia Co., on College 

 campus, Morgantown {Millspaugh, discov. 1891-). 



Hypae forming minute tufts, the fertile very short, bearing 



