Davis — A Provisional List of Parasitic Fungi. 851 



PLASMOPARA VITICOLA (B. & C.) Berl. & De Toni 

 On Psedera sp. indet. 



Vitis labrusca (cult.) 

 vulpina 

 spp. indet. 



PLASMOPARA AUSTRALIS (Speg.) Swingle 

 On Sicyos angulatius 



PLASMOPARA HALSTEDII (Pari.) Berl. & De Tottl 

 On Eupatorium urticaefolium 

 Solidago riddellii 

 Erigeron annuus 

 Silphium terebinthinaceum 



trifoliatum 



integrifolium 



perfoliatum 

 Ambrosia artemisiaefolia 



trifida 

 Rudbeckia laciniata 

 Helianthus annuus 



occidentalis 



grosse-serratus 



divaricatus 



slrumostis 



tuberosus 

 Bidens frondosa 



vulgata 



connate 



cernua 



Erechtites hieracifolia 



.fcuh>^^ 



PERONOSPORA SCHLEIDENI Unger 

 On Allhtm Cepa (cult.) 



PERONOSPORA URT1CAE (Lib.) DBy. 

 On Urtiea gracilis 



PERONOSPORA POLYGONI Thuem. 

 On Polygonum scandens 



PERONOSPORA EPFUSA (Grev.) Rabh. 

 On Chenopodium hybridum 

 album 



