Pholiota aurivella (Batsch) P. Kumm. 1871

Hypodendrum aurivellum (Batsch) Overholts
Agaricus aurivellus Batsch, Elench. Fung. Contin. 1 : 153. 1786. Pholiota aurivella Gill. Champ. Fr. 441. 1876.
Pileus 4-13 cm. broad, campanulate to convex, often broadly umboriate, when young more or less uniformly ochraceous-orange to tawny, when mature becoming more uniformly tawny, at first covered with large appressed spot-like scales which may in large part disappear and when wet may become more or less gelatinous, viscid; context yellow; lamellae sinuateadnate or adnate, close, dark-rusty-brown when mature; veil forming a superior, torn, sporestained, partly evanescent annulus; stipe central or excentric, equal or tapering upward, dry, yellowish or yellowish-brown, floccose above the annulus, fibrillose below and increasingly scaly or shreddy downward with fibrillose scales that may become recurved, solid, 5-8 cm. long, 5-15 mm. thick; spores exactly and constantly oblong-ellipsoid, smooth, 7-9.5 X 4-5 ju; cystidia present, often rather rare, brown, sometimes projecting and rather conspicuously sharp-pointed, sometimes imbedded and blunt, 6-8 p. in diameter.
Type locality: Europe.
Habitat: On trunks of living (rarely dead) deciduous or coniferous trees. Distribution: Illinois, Colorado, California, and Oregon; also in Europe.