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 HI 



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PLATE 2. 



Erysipheae. 



Uiiciniila Salicis. (D C). 



Fig. 1. Natural size on leaf of Salix flavoscens, var. Scoulcriana, 

 from Montana. 



2. Part of a leaf with poritlieciamagnifiod. 



3. A peritheciuni highly niagnifiod. 



4. An ascus. 



5. Three tsporidia. 

 G. A conidia l)earing hypha. 



7. Five oonidia. 



8. Initial hyphae forming a peritheciuni. 



