How to identify it?
Immature Fruiting Body

Cap
Cap 6-14 cm across, convex, squarish shape, but flattening with age; whitish, with light brown tints towards the centre; surface dry and smooth, turns yellow when bruised.

Scientific Classification

Phylum
Club fungi Class
Mushroom-forming fungi Order
Gilled fungi Family
Agaricaceae Genus
Agaricus Species
Yellow stainer