Amanita rubescens var. alba

Amanita rubescens var. alba

"This mushroom is a white, stocky variety of the well known "blushing" species, Amanita rubescens. It is found in eastern North America, often growing alongside the typical variety--but one does not find "intergrading" forms, which suggests that the two taxa are indeed distinct at some level (Michael Kuo)."
Taxonomy
KingdomFungi
DivisionBasidiomycota
ClassAgaricomycetes
OrderAgaricales
FamilyAmanitaceae
GenusAmanita
SpeciesAmanita rubescens var. alba