October 2004 Oxfordshire. Photograph copyright Leif Goodwin.
Convex, then flattened, smooth, often with dark spots and a frosted appearance, margin often furrowed, grey brown to beige, to about 12 cm across
Adnate, crowded, whitish then grey pink
Fairly stout, equal or club shaped, fibrous, concolorous with the cap
White, firm, thick
In large groups and rings in meadows, pastures and unimproved grassland
Spores ellipsoidal, with small warts (4.5-6) x (3.5-4.5) µm2
This is not an easy species to identify. Look for the frosted cap surface with dark spots, and the furrowed margin