172 The Ohio Naturalist. [Vol.X, No. 7, 



4. Appendages 3-7 times diameter of perithecium, colored nearly to 

 apex russellii 



Apendages colorless 5 



o. Branches lax and irregular diffusa 



Branches close and regular, digitate grossulariae 



Microsphaera euphorbiae (Peck) B. & C. Perithecia 85-145 //; 

 in diameter; cells 10-15 /<; appendages 7-28, 23^-8 times diam- 

 eter of perithecium, contorted, colorless, nonseptate, 3—4 times 

 dichotomously branched, branches lax and irregular; asci 4-13, 

 short-stalked, 48 x 26-66 x 35 /<; spores 4, 19 x 10-21 x 12 //. 



Host plants in Ohio Herbarium: Euphorbia corollata, Toledo, 

 F. D. Kelsey. 



Otherwise reported in Ohio: Euphorbia corollata, Columbus, E. M. 

 Wilcox. 



Microsphaera alni (Wallr.) Salm. Mycelium thin; perithecia 

 66-110 /( in diameter; cells 10-15 a\ appendages 4-26, ^-'2\ 

 times diameter of perithecium, colorless, often darker at base, 

 apex 3-6 times dichotomously branched, ultimate branchlets 

 recurved; asci 3-8, 42 x 32-70 x 50 /(, short-stalked; spores 4-8, 

 18 X 10-23 x 12, «. 



Host plants in Ohio Herbarium: Sambucus canadensis, Cuyahoga 

 Co., E. Claassen; Gleditschia triacanthus, Columbus, W. A. Kellerman, 

 Alton, F. L. Stevens, Brown Co., W. A. Kellerman, Hebron, Kellerman 

 and Beatty, Warren Co., Fairfield Co., W. A. Kellennan, Columbus, Weed 

 and Craig; Castanea dentata, Cuyahoga Co., E. Claassen; Cornus candi- 

 dissima, Cuyahoga Co., E. Claassen; Syringa vulgaris, Cuyahoga Co., E. 

 Claassen, Columbus, E. E. Bogue; Lilac (cult), Hamilton Co., W. H. Aiken, 

 Sugar Grove, W. A. Kellerman; Vibernum acerifolium, Platanus occiden- 

 talis, Lonicera ciliata, Cuyahoga Co., E. Claassen, Viburnum cassinoides, 

 Ottawa Co., W. A. Kellerman; Castanea sativa, var. americana. Sugar 

 Grove, Wilcox, Bogue and Weed; Lathyrus myrtifolius, Painesville, W. C. 

 Werner. 



Otherwise I'eported in Ohio: Euonymus atropurpureus, Ross Co., 

 W. A. Kellerman, Columbus, A. D. Selby; Sambucus canadensis, Colum- 

 bus, A. D. Selby; Platanus occidentalis, I olumbus, A. D. Selby; Castanea 

 sativa var. americana, Ross Co., W. A. Kellerman ; Gleditschia triacanthos, 

 Ross Co., W. A. Kellerman. 



Microsphaera alni extensa (C. & P.) Salm. Mycelium per- 

 sistent; perithecia gregarious, 90-140 /i in diameter; cells 10-20 //; 

 appendages 8-19, 23/^-6 times diameter of perithecium, flexuous, 

 colorless, nonseptate, walls thickened toward base, apex 3-5 times 

 dichotomously branched, branching close, ultimate branchlets 

 distinctly recurved; asci 3-8, short-stalked, 58 x 34-72 x 45 //; 

 spores usually 6, 22 x 12-26 x 15 it. 



Host plants in Ohio Herbarium: Quercus sp., Columljus, C. M. Weed; 

 Quercus tinctoria, Lawrence Co., W. A. Kellemian ; Quercus macrocarpa, 

 Columbus, C. M. Weed; Quercus rubra, Columbus, E. V. Wilcox; Quercus 

 nigra, Fairfield Co., W. A. Kellerman; Otiercus coccinea, Worthington, 

 CM. Weed. 



