Agrocybe arvalis, commonly known as the digitate fieldcap or tuberous fieldcap, is a species of mushroom. It grows in garden beds and on woodchips.
Agrocybe arvalis has a brown, hygrophanous cap and brown spore print. It does not have an annulus. The cap is 1-3 centimeters in diameter. The gills start out yellowish buff in color, and darken in age. The stipe is 5-10 centimeters long and 2-4 millimeters wide.
This species fruits from a sclerotium.
Spores are elliptical and smooth, ranging from . Pleurocystidia can have 3âÂÂ5 apical, finger-like projections.