20 



P. tanaceti, D. C. on Helianthus annuus, 



Ross, 



on Helianthus divaricatus Erie. 



P. violae (Sch.) D. C. on Viola cucullata Ross. 



P. xanthii Sch. on Xanthium canadense Franklin. 



Aecidum iinpatientis, Sch. on Impatiens ful- 

 va 



Ae. ranunculi, Sch. on Ranunculus abortiv- 

 us 



Ae. sambuci, Sch. on Sambucus canadensis. 



Highland. 



Ae. asterum, Sch. on Solidago sp. ind " 



Ae. con'positarum, on Solidago sp. ind Franklin. 



Roestelia globosum, P'arl., on Crataegus punc- 

 tata Adams. 



R. nidus-avis, Thax., on Amelenchier canad- 

 ensis Highland. 



Uredo — caeoma-nitens, Sch., on Rubus cana- 

 densis Ross. 



on Rubus canadensis Highland. 



USTILAGINACE^. 



Entyloma compositarum, Farl., on Rudbeckia 



lacinata Erie. 



Ramphospora nymphaea^, Cunn., on Nyniphaea 



odorata " 



PERONOSPORACEvE. 



Albugo candidus, (Pers) O. Kuntze on Bursa 



pastoris Franklin. 



on Thelypodium pinnatifidum Ross. 



A. portulacae (Pers) O. Kuntze on Portulaca 



oleracea Franklin. 



Plasmopara alta, Fk., on Plantago major.... " 

 P. viticola. (B. & C.) B. & De Toni, on Vitis 



ind 



on Vitis cordifolia Erie. 



