Amanita bisporigera identification

About mushroom

Amanita bisporigera Atkinson Cap 3-10cm across, convex to flat or depressed; white, sometimes with a faint tinge of pale brown on the disc; smooth and slightly sticky when moist. Gills free to just reaching the stem, crowded, attenuate; white. Stem 60-140 x 7-18mm, solid, tapering slightly toward the top; white; often woolly or scaly; ball-shaped basal bulb; the white ring near the top of the stem is thin, delicate, and drooping or shredded in a mature specimen; the volva is a white membranous sac. Flesh white. Spores globose, amyloid, 7.8-9.6 x 7-9?. Basidia mostly 2-spored. Deposit white. Habitat singly in mixed coniferous and deciduous forests. Fairly common. Found in eastern North America. Season June-September. Deadly poisonous. Comment This is extremely similar to the deadly poisonous Amanita virosa,which has mostly 4-spored basidia.

Amanita bisporigera photos

More info about Amanita bisporigera mushroom

Stem type:
Ring on stem
Volva on stem
Bulbous base of stem
Stem much longer than cap diameter
Deadly
Habitat:
Grows on the ground
Grows in woods
Spore colour:
White
cream or yellowish
Fungus colour:
White to cream
Normal size:
5-15cm
Location:
North America
Last modification: 2015-10-02 00:31:34

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