Agrocybe firma

Appearance

Cap: 3-6.5 cm; convex at first, becoming broadly convex; tacky; bald; dark brown when young, maturing to yellow brown; the margin not lined.

Gills: Narrowly attached to the stem; close; short-gills frequent; whitish at first, becoming dull brown.

Stem: 6-8 cm long and 0.5-1 cm thick; more or less equal; distinctively longitudinally ridged with fibrils and aggregations of fibrils that are initially whitish but become brown (reminiscent of scabers in the genus Leccinum); ground color medium brown; without a ring; basal mycelium and rhizomorphs prominent, white.

Flesh: White; unchanging when sliced.

Odor and Taste: Mealy.

Spore Print: Dark brown.

Distribution

Wwidely distributed and fairly common east of the Great Plains; very rarely reported from Colorado, California, and the Pacific Northwest; also found in Europe.

Habitat

Growing in small to large clusters (rarely alone) on the deadwood of hardwoods; spring through fall