852 Wisconsin Academy of Sciences, Arts, and Letters. 



PERONOSPORA OBOVATA Bon. 

 On Bpergula arvensis 



PERONOSPORA ALSINEARUM Caspary 

 On Cerastium nutans 



PERONOSPORA FICARIAE Tul. 

 On Ranunculus fascicular is 



pennsylvanicus 

 septentrionalis 



PERONOSPORA CORYDALIS DBy. 

 On Dicentra cucullaria 



PERONOSPORA PARASITICA (Pers.) Tul. 

 On Draba carol iniana 

 Lepidium virginicum 

 Raphanus sativus (cult.) 

 Brassica nigra 



arvensis 

 Radtxula palustris 

 Dentaria laciniata 

 Cardamine douglassU 

 Arabis laevigata 



PERONOSPORA POTENTILLAE DBy. 

 On Potent ilia monspeliensis 

 Geum canadense 

 macrophyllum 

 strictum 

 rivale 

 Agrimonia parvi flora 



PERONOSPORA RUBI Rabh. 

 On Rubus canadensis 



PERONOSPORA TR1FOLIORUM DBy. 

 On Medicago sativa (cult.) 



PERONOSPORA VICIAE (Berk.) DBy. 

 On Pisum sativum (cult.) 

 Ticia americanaf 



PERONOSPORA EUPHORBIAE Fckl. 

 On Acalypha virginica? 

 Euphorbia maculata 



