Saccate Phalloideae     SubSection

Cortinarius husseyiKey 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.

TricholomaAgaricales     Order
Fruiting body containing fibers (usually in the stalk)

Amanita caesareaAmanita     Genus
Fruiting body having a combination of some of the following characteristics:
Stalk growing out of a cup of cottony tissue called a volva (all white-spored mushrooms with a volva go here)
Cap with scattered patches or flakes of the same sort of tissue as the volva (see second picture), easily peeled off
Annulus (skirt-like ring on stalk)

Amanita bisporigeraPhalloideae     Section
Annulus always present
Either volva present, sack-like and cap either white or olive brown, or
Stalk with a basal bulb and cap either greyish brown or yellow

Saccate Phalloideae     SubSection     

Amanita bisporigera


Narrow down your identification:

Amanita bisporigeraAmanita bisporigera
Entire fruiting body white, small to medium
Cap staining yellow with KOH

Amanita phalloidesAmanita phalloides
Cap up to 6" across; virgate, making it look a little streaked; yellowish green at margin, shading to olive brown over the disk
Volva usually lobed or petalloid, almost resembling a tulip in shape

Amanita bisporigeraAmanita virosa
Entire fruiting body white, medium to large