How to identify it?
Cap
Cap 2-8 cm across, egg-shaped or nearly round, becoming convex to broadly convex or nearly flat; white and light gray-brown in the center; surface soft powdery. Flesh very thin, whitish. Odour and taste not distinctive.
Gills
Gills free, white to pale buff, close or nearly crowded.
Photo By Jason Hollinger (jason) , used under CC-BY-SA-3.0 /Cropped and compressed from original
Scientific Classification
Phylum
Club fungi Class
Mushroom-forming fungi Order
Gilled fungi Family
Agaricaceae Genus
Leucocoprinus Species
Onion-stalk parasol mushroom