Amanita calyptroderma

Amanita calyptroderma

''Amanita calyptroderma'' also known as coccora or coccoli, is a white-spored mushroom that fruits naturally in the coastal forests of the western United States during the fall and winter.
Yellow capped mushrooms with white veil remnants  Amanita calyptroderma,Fall,Geotagged,United States

Appearance

This mushroom is recognized by its large, orange-brown cap partially covered by a thick patch of universal veil, its white gills and spores, its cream-colored stalk adorned with a partial veil, a partially hollow stem , and by the presence of a large, sacklike volva at the base of the stalk.

The spores of this species do not change color when placed in a solution of Melzer's reagent, and thus are termed inamyloid. This characteristic in combination with the annulus and absence of a bulb at the base of the stalk place this mushroom in the Section ''Caesareae''.

Naming

''Amanita vernicoccora'' is a closely related taxon which was previously referred to as the "spring form" of ''Amamita calyptroderma''.

Distribution

This mushroom forms mycorrhizae with madrone (Arbutus menziesii) in the southern part of its range (Central California northwards to Washington). However, in the northern part of its range (Washington to southern Canada), its preferred host is Douglas fir (Pseudotsuga menziesii).

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Taxonomy
KingdomFungi
DivisionBasidiomycota
ClassAgaricomycetes
OrderAgaricales
FamilyAmanitaceae
GenusAmanita
SpeciesA. calyptroderma