Agrocybe praecox, also known as Spring Fieldcap, is a medium-sized agaric with a cream-coloured cap, light brown gills, and a ring on the stem. It grows tufted or scattered on soil among grass, occasionally on rotting straw, and can be found in thickets and woodland edges.

Cap pallid tan or cream-coloured, occasionally appearing more brownish ochre. It is hygrophanous, drying to an almost white colour. Initially convex, it becomes expanded and can be smooth or sometimes wrinkled and greasy when young. As it ages, the cap develops slight crazing and sulcation. The flesh is whitish, firm, and moderate. Gills adnate or adnexed to almost free, pale buff at first becoming dirty brown as the spores mature. Stem whitish, but becomes discoloured brown with age. It is pruinose at the apex and more or less equal in thickness, with a bulbous base. The ring is initially white but turns brown as spores develop. It is fibrous, spreads out, and often remains partly attached to the cap margin. Spore print brown.

Microscopic Features: The spores are ellipsoidal to ovoid in shape, with a smooth surface. They measure 7.5-10 μm in length and 5-6 μm in width. Notably, they possess a prominent germ pore.

Agrocybe praecox on the www.first-nature.com web site.
Agrocybe praecox on the MushroomExpert.Com Web site.