How to identify it?
Cap
Cap 3-10 cm across, hemispherical and brown when young, becoming weakly convex; pale yellow-brown; surface smooth. Flesh up to 1.5 cm thick, white. Taste bitter and has a cucumber after taste.

Gills
Gills adnexed, clay-brown to dark brown, moderately crowded, with short gills.


Scientific Classification

Phylum
Club fungi Class
Mushroom-forming fungi Order
Gilled fungi Family
Strophariaceae Genus
Agrocybe Species
Mulch fieldcap