Agrocybe firma (Peck) Singer 1940

Naucoria firma Peck, Ann. Rep. N. Y. State Mus. 54: 148
1901.
Pileus fleshy, firm, broadly convex, soon nearly plane, 1.5-2.5 cm. broad; surface hygrophanous, blackish-brown when moist, ochraceous-brown when dry, often rugulose; context white, the taste farinaceous, soon changing to bitter; lamellae thin, rather narrow, crowded, rounded behind, adnexed, minutely floccose on the edges, pallid; spores ellipsoid, brownishferruginous, 7.5 X 5 fx; stipe firm, equal, often flexuous or curved, stuffed or hollow, fibrillosestriate and minutely flocculose, concolorous or a little paler, 2.5-5 cm. long, 2-4 mm. thick,
r
1
Type locality: Floodwood, New York.
Habitat: On a decaying, prostrate trunk of sugar maple.
Distribution: New York and Massachusetts.