Y7 



PERONOSPORA GANGLIFORMIS, De By. 



Living leaves of Sonchus asper. Warsaw. 



PEZICULA ACERICOLA, Pk. 



Variety gregaria Pk. Receptacles small, gregarious. Bark of red 

 maple, Acer rttbrum. Kamer. September. 



RHYTISMA SALICINUM, Fr. 



Fallen leaves of Salix Cutleri. Mt. Marcy. June. Fertile 

 specimens. 



