Amanita calyptrata var. albescens is approximately 60 mm wide, whitish, plano-convex to planar, with a distinctly striate margin.  The volva is present as a membranous patch, large, covering most of cap.

The gills are free, crowded, with even edges.

The stem is approximately 120 × 13 mm, tapering slightly upward. The ring is membranous.  The saccate volva is membranous, large, thick, and lobed. The flesh is hollow.

Spores measured from the study of the type by Jenkins (1978a) are as follows: 12.5 - 13.0 × 9.0 - 10.0 µm and are ellipsoid and inamyloid.  Spores measured from Canadian material sent to RET by Lamoureux that may belong to the present species are as follows: 10.8 - 13.0 (-14.5) × (8.0-) 8.2 - 10.2 (-10.5) µm.

The original habitat information was not recorded.  This taxon is known only from its type collection.

Because Peck's use of the term white was very inclusive compared to modern usage, we are tempted to make the comparison to A. murrilliana Singer.  The latter tends to have brownish tones in the center of the cap and a whitish margin of varying width. However, the spores are distinctly narrower in A. murrilliana than in the present taxon.  If the Quebec collection mentioned above truly represents the present taxon, then the species is assignable to Bas' stirps Hemibapha.  Following such an assignment, a name change would be required because Amanita calyptrata Peck non Lam. is probably a synonym of A. calyptroderma G. F. Atk. & Ballen; and the latter species belongs in stirps Calyptroderma.