42 Till-: WLiST \TRG1XIA II.( )KA 



TRICHAEGU-M Cn-da. 

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



Type habitat: On dead leaves Carcx Frascri, Feb. 11, 

 1894 {Niittall, discov. 1373, 333). 



Erunipcnt, tufted, becoming subetTused, l)lack, tufts gre- 

 garious, forming subvelutinous patches 2 to 4 mm. across, 

 or when standing singly the hyphcC and conidia forming a 

 compact mass .5 to i mm. diameter, and resembling some- 

 what the sorus of a Pncciiiia. Hyph?e simple sparingly fasci- 

 culate, brown, septate, often swollen at the septa, about 4 n 

 thick and 200 to 300 ju, long. Conidia near the base of the 

 hypha:^, at first elliptical, yellowish-hyaline, uniseptate, 8 to 

 10 X 6 to 7 ju,, soon becoming 4 to 6-septate, muriform and 

 opaque, 10 to 25 fx diameter, subglobose, obovate, or elliptical. 



SEPTOSPORIUM Corda. 



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



Type habitat: Tips of living leaves Equisctnm arrcnsc, 

 Doddridge Co., near Center Point, and Monongalia Co., on 

 College campus, Alorgantown (Millspaugh, discov. 1891). 



Hyphae forming minute tufts, the fertile very short, bear- 

 ing acrogenous spores, the sterile longer, septate, colored ; 

 spores elliptical, usually with three transverse septse and 

 one or two longitudinal ones, colored, .001 in. long, .005 in. 

 broad. 



ALTERNARIA Nees. 



A. Brassicae nigrescens Pegl. 



On Alusk-melons, Ohio, near Elm Grove (Sheldon). 



SARCTNELLA Sacc. 



S. heterospora Sacc. 



On Ccrcis Canadensis, Oct. 16, 1894 {Nnttall, 1726, 610). 



S T I L B A C E AE. 



STILBUM Tode. 



S. MAGNUM Peck. 



In cracks of bark, Nov. 6, 1893. Spores 2.5 x 1.25 ,u 

 (Nuttall, 1278, 225). 

 S. FLAViPES Peck. 



On dead driftwood Plafcnus occidcnfalis, Dec. 12, 1894 

 (Nuttall, 1767). 

 S. erythrocephalum Ditm. 



On dung of Rabbit, Jan. 18, 1894 (Nuttall, 1345, 304). 



