Leucoagaricus americanus

[3] It was first described by Charles Horton Peck, an American mycologist of the 19th and early 20th centuries, in 1869.

It is widely distributed in North America, though more common east of the Rocky Mountains; it is saprobic, and grows on sawdust, on wood chips, on stumps, and on the ground.

[4] The cap is 3–15 cm and oval in shape when immature, becoming convex to flat when fully grown.

The membranous veil leaves a white double edged ring on the upper stipe that may disappear in age.

[3] It is reported to be edible, but not recommended for consumption because of possible confusion with toxic species like Chlorophyllum molybdites.