792 THE AGARICACEAE OF MICHIGAN 



layer of subgelatious hyphae which cover these parts. After drying- 

 out somewhat it was found that a nitrous odor developed; this 

 fact does not seem to be mentioned elsewhere. Peck reports the 

 species from New York, but elsewhere it seems to have been over- 

 looked. The attachment of the gills is almost like that of the 

 genus Omphalia, and the color of the gills is apt to lead one to 

 place it among the pink-spored group. Mycena capillaripes Pk. 

 (N. Y. State Mus. Kep. 41, 1888) is very close to if not identical 

 with it. 



842. Mycena purpureofusca Pk. 

 N. Y. State Mus. Rep. 38, 1885. 



"PILEUS 8-10 mm. broad, wot hygrophanous, campanulate or 

 convex, obtuse, glabrous, striate, purplish-brown. FLESH mem- 

 branous. GILLS adnate, ascending, lanceolate, subdistant, white 

 or whitish, purplish-brown on the edge. STEM 2.5-7.5 cm. long, 

 scarcely 2 mm. thick, slender, even, hollow, glabrous, with white 

 hairs at the base, colored like the pileus or a little paler. SPORES 

 subglobose or broadly elliptical, 6-7.5 x 6.5 micr." 



On mossy hemlock logs in woods. Bay View. September. 

 Rare. 



Peck says it is closely related to M. rubromarginata Fr., from 

 which it differs in its darker color and non hygrophanous striate 

 pileus. Longyear, in the 4th Report of the Michigan Academy of 

 Science, lists M. rubromarginata Fr. but he is uncertain of the 

 identification; it is probably Peck's species. 



843. Mycena denticulata Pk. 

 Torr. Bot. Club, Bull. 32, 1905. 



PILEUS 8-18 mm. broad, campanulate, toughish, often obtusely 

 subconic, glabrous, not striate, grayish-brown, darker on center, 

 margin soon split. FLESH thin, membranous. GILLS adnate 

 with slightly decurrent tooth, often adnexed-emarginate then 

 broader, medium broad, ventricose, subdistant, thickish, whitish, 

 edge dark brown, crenulate, sometimes venose-connected or a few 

 forked. STEM 3-0 cm. long, 1-1.5 mm. thick, equal, slender, even, 

 hollow, toughish, glabrous or subfurfuraceous with minute brown 

 dots, pallid. SPORES sub-globose to elliptic-oval, 7-8x5-7 micr., 

 smooth, white. CYSTIDIA none. Sterile cells on edge of gills, 



