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PERONOSPORA GANGLIFORMIS, De By. 

 Living leaves of Sonchiis asper. Warsaw. 



PEZICULA ACERICOLA, Pk. 



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

 maple, Acer ruhriim. Kamer. September. 



RHYTISMA SALICINUM, Fr. 



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

 specimens. 



