94 Twenty-fifth Report on the State Museum. 



Bark of prostrate spruce trunks. Sandlake. September. 

 The larger spores and echinulate threads separate this from S. 

 atra B. & C. 



Cladospoeium epiphyllum J^ees. 



Fallen leaves of Platanus ocmdentalis. Caslleton. June. 



OiDiuM SIMILE Berli, 



Decaying wood. Poughkeepsie. Gerard. 



OlDIUM MONILIOIDES Lk. 



Living grass leaves. West Albany. June. 



Zygodesmus euscus Cd. 



Decaying wood and leaves. Greenbush. July. 



Zygodesmus olivaceus B. (& C. 



Decaying wood. Sandlake. September. 



This scarcely diifers from the preceding species except in its 

 olivaceous color. 



AscoPHOEA MucEDo Todt. 

 Stale bread. Albany. 



Onygena equina Pers. 



Old hoofs. Buffalo. Clinton. 



Sphjeeotheoa Castagnei Le'd. 



Both sides of various leaves. Common. 



SPHyEROTHECA PKUINOSA C. (& P. 



Hypogenous; mycelium thin, eifase, persistent; conceptacles 

 minute, black ; appendages few, long, colorless ; sporangium ovate, 

 eight spored. 



Leaves of Rhus glabra. Greenbush. August. 



The long colorless appendages readily distinguish this species 

 from the preceding. The whole lower surface of the leaf appears 

 whitened as if pruinose. 



PODOSPH^RA BIUNCINATA C. <& P. 



Mycelium thin ; conceptacles minute, black ; appendages six to 

 ten, very long, colorless, biuncinate, the tips of the divisions some- 

 times again divided ; sporangium globose, containing eight spores. 



Upper surface of leaves of the witch hazel, Ilamamelis Yirgin- 

 iana. Poughkeepsie. Gerard. New Baltimore. Howe. Sandlake. 

 September. 



