Oak-loving Collybia Waldrübling Collybie des chênes Russet Toughshank Collybia dryophila (Bull. ex Fr.) Kummer syn. Gymnopus dryophilus (Bull.: Fr.)Murrill Cap 2.5-5cm across, convex and then flat, margin inrolled; ochre-brown to reddish or pale tan; smooth, dry. Gills adnate, crowded, narrow; white to pallid, not staining. Stem 10-70 x 1.5-5mm, smooth, brittle; reddish brown to ochre, paler at base, which is bristly-hairy. Flesh very thin; white. Odor not distinctive. Taste not distinctive. Spores ellipsoid, smooth, 5-6 x 2-3µ. Deposit white. Habitat usually gregarious, under both oak and pine. Rather common. Found in most of North America. Season May-November. Edible but not worthwhile (see Comment). Comment This species has recently been split into several distinct species, including the usually spring fruiting Collybia subsulphurea (Pk.) Bull., which differs in the general sulphur-yellow color of its fruit body and in possessing rhizomorphs, which are pinkish buff at the stem base; the gills may be white or yellow. In view of the confusion in this species it is recommended that it not be eaten.