Pileus somewhat membranaceous, convex, then expanded, umbilicate, and there more especially downy, then squamulose, sometimes glabrous (except the disc), sometimes fibrillose, hygrophanous, at first smoke-colour, or mouse-colour, then livid grey, 2.5-4 cm. across;^, gills adnate, then separating from the stem and becoming free, rather distant, plane, equally narrowed from the stem to the margin, greyish-white, edge quite entire and of the same colour as the remainder; spores elliptical, 10-12 x 6-8 µ; stem 2.5-5 cm long, not more than 2 mm. thick, equal, straight, even, glabrous, cartilaginous, hollow, livid, fuscous, green and blue mingled, &c., base with white down.

New Zealand. Europe.

Among grass.

Some specimens have the pileus squamulose everywhere, some forms resemble a Nolanaea ; pileus hemispherical, then campanulate, disc sometimes with a minute depression; sometimes with a papilla (Fries).