216 The Ohio Journal of Science [Vol. XXI, No. 6, 



Microsphaera euphorbiae (Peck) Burk. & Curt. 



Butler County. Also collected here by E. E. Duncan. 

 Known now from but three localities in Ohio and on the single 

 host, Euphorbia corollata. 



Microsphaera grossulariae (Wallr.) Lev. 



Butler, Montgomery, and Lake Counties. Also collected in 

 the first county by V. E. Lantis. Recorded for Ohio from 

 only two other localities and only on Sambucus canadensis. 



Microsphaera russellii Clinton. 



Butler County. Collected here also by E. E. Duncan. Com- 

 mon enough here, but reported from only three other localities 

 in Ohio. Easily overlooked as the mycelium is inconspicuous 

 and usually evanescent. Found only on species of Oxalis, and 

 known to me only on Oxalis stricta. 



Phyllactinia corylea (Pers.) Karst. 



Butler and Montgomery Counties. Also collected in the 

 first county by Freda M. Bachman. On Fraxinus americana, 

 Juglans nigra, and Morns rubra. Known from several localities 

 in Ohio, but inconspicuous and usually overlooked. Formerly 

 known under the synonym, Phyllactinia stiff ulta (Reb.) Sacc. 



