BRIEF DESCRIPTION: The cap of Amanita ocreata is 44 - 127 mm wide, hemispherical at first, then plano-convex, white, sometimes yellowish to pale ochre, subviscid, shiny, with a nonstriate to shallowly striate margin. The margin is at first slightly incurved, then decurved, and finally slightly flaring, at times appendiculate with thin, membranous, white fragments from the ring. The flesh is white, sometimes with a thin, water-logged line above the gills. The volva is absent or a very thin, white, easily removed, floccose-membranous patch covering most of the cap surface.

The gills are close to moderately crowded to crowded, free to narrowly adnate, white in mass, very pale cream in side view, with a faint decurrent line on the stem. The short gills are numerous, subtruncate to subattenuate to attenuate.

The stem is 50 - 150 × 11 - 29 mm, cylindrical or narrowing downward, hollow, slightly fibrillose to floccose below the ring, flocculose-pulverulent above, becoming glabrous towards the base, white, unchanging. The ring is white, thin, membranous, striate or not above, floccose-fibrillose below. The flesh is white or very pale cream in the center, unchanging, solid. The bulb is ovoid to subfusiform to subnapiform to subradicating, and 27 - 42 × 21 - 46 mm. The volva is white, thin, membranous, somewhat tough, with a soft surface.

The odor is absent or slightly of bleach or chlorine, of dead fish, or of iodine.

The spores measure (6.8-) 8.8 - 12.0 (-13.8) × (5.9-) 6.3 - 8.5 (-10.8) µm and are occasionally subglobose to broadly ellipsoid to ellipsoid to occasionally elongate and amyloid to strongly amyloid.

The cap of A. ocreata turns yellow in respond to KOH solution as in A. bisporigera G. F. Atk.

Amanita ocreata is known from Washington to California, USA, and Baja California, Mexico. This species is solitary to subgregarious to gregarious in sand or sandy loam, in coastal counties. It is found under oak or in mixed woods of pine and oak as well as under hazel.

The reader may want to examine the recently revised key to the taxa of sect. Phalloideae in North America. -- R. E. Tulloss