PLATE 3. 



Erysipheae. 



Phyllaetinia suffulta, (Reb.). 



Fig. 1. Natural size, on chestnut leaf. 



2. Peritheciuin enlarged. 



3. Two asci. 



4. Three sporidia. 



5. Conidia-bearing hyphae. 



6. Conidium germinating. 



