MICHIGAN ACADEMY OF SCIENCE. 
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9. Fruit-bodies in a stroma, which forms black patches on leaves ; 
spores needle-shaped, 1-celled, hyaline: Rhytisma. 
( R . acerinum on maple leaves). 
10. Spores elliptical, hyaline, 1-celled: Paraphyses much branched 
above; hymenium tliin-margined. Propolis. 
10. Spores filamentous, many-celled ; paraphyses slightly branched; 
hymenium thick-margined : Stictis. 
CD 
(K) Disco my cetes.— L. 
L. Hymenium on a differentiated upper part of fruit-body, which is 
stalked and fleshy, waxy or gelatinous (M) Eelvellales. 
L. Hymenium concave, even or convex, forming the upper surface of a 
usually cup- or urn-shaped fruit-body which is sessile or stalked. 
(1ST) Pezizales. 
(M) Eelvellales. 
a. Fruit-body capitate; the cap spherical, elongated, etc., even, folded or 
ribbed, fleshy : (g) Eelvellaceae. 
a. Fruit-body clavate, fleshy or gelatinous; asci opening at apex by a 
pore. (li) Geoglossaceae. 
(N) Pezizales. 
b. Cups or disks of small size, growing on dung; sometimes on other 
substrata: (i) Ascololaceae. 
b. Not on dung; usually on earth, or on wood (c) 
c. Cups fleshy or waxy, rarely gelatinous; ends of paraphyses free..(d) 
c. Cups leathery or cartilaginous; ends of paraphyses united to form a 
thick layer over asci (==Epithecium) , . . (f) 
d. Cups generally large (1-5 cm.), fleshy structure of fruit-body of simi- 
lar, parencliyma-like cells: (k) Pezizaceae. 
d. Cups generally small or minute, waxy; structure of fruit-body of 
long, slender hyphae, outer layer often differentiated (e) 
e. Hyphae of fruit-body all hyaline: Cups mostly minutely stalked; on 
wood and herbs: (1) Eelotiaceae. 
e. Outer hyphae of thick-walled brown cells; cups sessule; growing on 
herbs: (m) Mollisiaceae. 
f. Cup free from the first upon the substratum, never enclosed in a mem- 
brane. (n) Patella/riaceae. 
f. Cup at first imbedded in the substratum, then breaking thru epider- 
mis, often at first enclosed in evanescent membrane: 
(o) Cenangiaceae. 
