Davis — A Provisional List of Parasitic Fungi. 857 



MICROSPHAERA EUPHORBIAE (Pk.) B. & C. 

 On Euphorbia corollata 



MICROSPHAERA GROSSULARIAE (Wallr.) Lev. 

 On Sambucus canadensis 

 racemosa 



MICROSPHAERA DIFFUSA Cke. & Pk. 

 On Desmodium canescens 

 paniculatum 

 canadense 

 Lespedeza violacea 



MICROSPHAERA RUSSELLII Clint. 

 On Oxalis "stricta" 

 corniculata 



ERYSIPHE GRAMINIS DC. 

 On Poa pratensis 



Agropyron repens 

 Qramineae varii 



ERYSIPHE AGGREGATA (Pk.) Farl. 

 On catkins of Alnus incana 



ERYSIPHE POLYGONI DC. 

 On Polygonum aviculare 



Ranunculus delpliinifolius 



abortivus 



acris 

 Thalictrum dasycarpum 

 Clematis virginiana 

 Caltha palustris 

 Aquilegia canadensis 

 Parnassia caroliniana 

 Lupinus perennis 

 Astragalus canadensis 

 Lathyrus venosus 



ochroleucus 

 Amphicarpa monoica 

 Geranium maculatum 



ERYSIPHE GALEOPSIDIS DC. 

 Stachys tenuifolia aspera 

 Chelone glabra 



