Description:
mushroom
Fruiting Body: cap 4-12 cm; stalk central, 10-20 cm long x 1-2.5 cm diameter, slightly enlarged at base. Spore Print Color: white. Spores: basidiospores 7-10 µm diameter, globose, smooth, hyaline, blue in Melzer's.

Diagnostic macroscopic feature: pure white, smooth cap and stalk with annulus, volva, free gills and white spore print are diagnostic for several deadly poisonous Amanitas; A. bisporigera turns yellow with application of 10% KOH

Diagnostic microscopic feature: 2 spores per basidium, and exclusively globose spores; it is currently thought that this A. verna and A. virosa reported in N.A. may in fact be this species If so, spores may be ellipsoid and 4. See http://pluto.njcc. com/~ret/amanita/sectphal.html

Nutritional Mode: ectomycorrhizal

Substrate: on ground

Habitat: deciduous woodlands

Fruiting Season: summer, fall