C. dryophila is a rather common species in the northern hemisphere, but was not found in New Zealand by us. However, Collybiopsis rimutaka (Stevenson) Horak which macroscopically resembles Collybia dryophila, was common throughout the country.

Pileus convex, then plane, obtuse, centre usually depressed, even, glabrous, dry, reddish-bay or pale-tan, becoming pale, but not hygrophanous, margin incurved at first, then expanded, 2.5-5 cm. across; flesh thin, white, flexible; gills almost free, with a minute decurrent tooth, but appearing as if adnexed when the pileus is depressed, crowded, narrow, distinct, plane, white or pallid; spores elliptic-fusiform, 7-8 x 4 µ; stem 2.5-5 cm. long, 2-4 mm. thick, cartilaginous, distinctly hollow, even, glabrous, somewhat rooting, base often swollen when growing in damp places among leaves, usually yellowish or rufescent.

Dannevirke, New Zealand. Ceylon, India, Australia, South Africa, Europe, United States.

On the ground, among fallen leaves, on rotten wood, &c.

Solitary or loosely gregarious, inodorous, very variable. Distinguished from its nearest allies by the narrow crowded gills and the obtuse pileus. (See note under C. xanthopoda.)