The cap is pale brown, initially conical but flattening with age, radially wrinkled and veined.  The stem is pale cream, darker towards the base, and with a thin pendent ring. The spores are brown.

other Agrocybe. 

Photograph from top down, in side view, and underneath to show gills and full length of stipe, including stem base; note habitat and substrate.

On woodchip piles

It is found in summer and autumn.

An alien speces first recorded in Britain in 2004, now common  

Fairly common in Leicestershire and Rutland.