172 
The Ohio Naturalist. 
[Vol.X, No. 7, 
4. Appendages 3-7 times diameter of perithecium, colored nearly to 
apex russellii 
Apendages colorless 5 
5. Branches lax and irregular diffusa 
Branches close and regular, digitate grossulariae 
Microsphaera euphorbiae (Peck) B. & C. Perithecia 85-145 fi; 
in diameter; cells 10-15 ; appendages 7-28, 2)^-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 ii\ spores 4, 19 x 10-21 x 12 fi. 
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 n in diameter; cells 10-15 /*; appendages 4-26, 2 5 
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 fi, short-stalked ; spores 4-8, 
18 x 10-23 x 12 ft. 
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. Kellerman, 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 oceiden- 
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 reported in Ohio: Euonymus atropurpureus, Ross Co., 
W. A. Kellerman, Columbus, A. I). Selby; Sambucus canadensis, Colum- 
bus, A. D. Selby; Platanus occidentalis, Columbus, 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 a in diameter; cells 10-20 /*; 
appendages 8-19, 2)^-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 //. 
Host plants in Ohio Herbarium: Quercus sp., Columbus, C. M. Weed; 
Quercus tinctoria, Lawrence Co., W. A. Kellerman; Quercus macrocarpa, 
Columbus, C. M. Weed; Quercus rubra, Columbus, E. V. Wilcox; Quercus 
nigra, Fairfield Co., W. A. Kellerman; Quercus coccinea, Worthington, 
C. M. Weed. 
