Volvariella hypopithys

Key to Gilled Mushrooms Key

This is a key to gilled mushrooms, that is, mushrooms having a definite cap with a fertile surface consisting of gills. The fruiting body usually also has a stem, although that may be lateral or absent (usually, then, the mushroom is growing from wood). You can use this key to identify mushrooms that you find.

Agaricales Order

With a saccate volva, or cup, at the base of the stalk
On a variety of substrates
Cap typically (but not in this picture) bluntly conical, not umbonate or convex

Little Volvariella Section

Cap typically less than 2" across

Volvariella hypopithys (Fries) R. L. Shaffer

Here are the characters that distinguish this species from the others in its group. For its more general characters, see higher up on the page.
If there's just a few words or a microscopic feature here, a more thorough description can be found above.

Diagnosis

Cap up to 2" across; silky; white; sometimes becoming yellowish or brownish on the disk (occasionally overall) in age
Stalk white; often silky like the cap
Volva small; white; often lobed; barely wider than the stalk: almost caligate
On the ground, usually in woods and along roadsides

Microscropic Characters

Spores 6-8.5 x 3.5-6 µm

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Volvariella hypopithys

Fruiting body containing fibers (usually in the stalk)

Spores pink or reddish

Gills free Often growing on wood

With a saccate volva, or cup, at the base of the stalk On a variety of substrates Cap typically (but not in this picture) bluntly conical, not umbonate or convex

Cap typically less than 2" across

Volvariella hypopithys (Fries) R. L. Shaffer

Diagnosis

Microscropic Characters

Gills free
Often growing on wood

With a saccate volva, or cup, at the base of the stalk
On a variety of substrates
Cap typically (but not in this picture) bluntly conical, not umbonate or convex