BRIEF DESCRIPTION: Description based on Reid (1980).

The cap of Amanita griseoconia is up to 95 mm wide, at first strongly convex, fawn, with a conspicuously appendiculate margin. The cap bears prominent, steel-gray, conical warts, becoming flattened, the warts collapse or disappear, leaving small, innate, darker pulverulent (lens) scales. The flesh is white.

The gills are white.

The stem is up to 11.5 - 22 mm, cylindric, somewhat swollen, white, covered with dense rings of tiny, flocculent scales and a 32 - 35 mm wide, fusiform bulb. The ring is farinaceous and quickly disappearing. The volva may be present as indistinct rings around the top of the bulb. The flesh is white.

The spores measure 7.8 - 11.0 x 6.8 - 9.0 µm and are globose to subglobose to ellipsoid and amyloid. Clamps are present at bases of basidia.

This species was originally described from Victoria, Australia, and is known only from the type. No ecological information was provided.