Agrocybe arvalis

Agrocybe arvalis is a species of Agaricales with a brown, hygrophanous cap and brown spore print. It does not have an annulus.

Spores are elliptical and smooth, ranging from 9–10.5 × 5.2–6 µm. Pleurocystidia can have 3–5 apical, finger-like projections.