350 GEOLOGY OF OHIO. 



MUCOR RAMOSUS Bull. 



Waynesville, Thos. G. Lea ( Cat.) 



118. FRANKIA Brunoh. 



Frankia ceanothi Atk. 



On Ceanothus americanus, Fairfield Co., W. A. Kellerman. 



XV. CHYTRIDIACE^. 



119. SYNCHYTRIUM DeBary. 



Synchytrium dECIpiens Farl. 



On Amphicarpaea comosa, Nebraska ( Pickaway Co.) , Columbus, W. A. Keller- 

 man. 



XVI. PERISPORIACE^. 

 (ERYSIPHEiE, Leveille. Powdery Mildew, White Mildew.) 



120. SPHiEROTHE-CA Lev. 



Sph^rotheca castagnei Lev. 



On Bidens frondosa, Columbus, Aug. D. Selby; on Erechtites, Columbus, Aug. 

 D. Selby. 



Sph^roTheca htjmuci (DC.) Burr. Hop Mildew. 



On Agrimonia eupatoria, Lancaster, W. A. Kellerman. 



Sph^Erotheca MORS-UV.E ( Schw.) B. & C. Gooseberry Mildew. 



Reported over the state on cultivated gooseberries, particularly on English 

 varieties. 



Sph^rotheca pannosa ( Wallr.) Lev. Rose Mildew. 



On cultivated roses ; Athens Co., Aug. D. Selby. Common on cultivated ro^es 

 generally. 



SpelErotheca phytoptophiea Kell. & Swingle. Hackberry Knot Mildew. 



On Phytoptus twig-tufts of Celtis occidentalis, Lima, W. A. Kederman ; Colum- 

 bus, Aug. D. Selby. Probably all over the state, wherever the host occurs. 



121. ERYSIPHE (Hedw.) Lev. 



Erysiphe cichoracearum DC. (E. lamprocarpa) Verbena Mildew. 



The commonest of all the mildews, particularly on species of Compositae, Bor- 

 raginacese, and Verbenaceae ; also on Parietaria peunsylvanica, Columbus, 

 Aug. D. Selby; on Hydrophyllum macrophyllum, Pickaway Co.. W. A. Keller- 

 man ; Fairfield Co., Aug. D. Selby ; on Dahlia ( cult ) Fairfield Co., W. A. Kel- 

 lerman ; Columbus, Aug. D. Selby; on Phlox sp. (cult.) Fairfield Co., W. A. 

 IOIlerman. 



