BRIEF DESCRIPTION: The following description is based on Reid (1980).

The cap of Amanita flavella is yellowish-orange, convex, with a nonstriate margin. The margin is slightly flaring.

The gills are crowded, white, and narrowly attached.

The stem is 75 mm high, slightly bulbous, attenuate, pale yellow above the ring, and white below. The ring is yellowish, membranous, ample, very narrow, and skirt-like. On the bulbous base of the stem, yellowish powdery warts of volva form one or more rings.

The spores measure 8.5 - 10 x 6 - 6.5 µm according to the original description [E.-J. Gilbert & Cleland (1941)] and are ellipsoid and amyloid. Reid (1980) found the measurements to be 8.0 - 8.5 x 5.0 - 6.5 µm.

The species was originally described from New South Wales, Australia. No ecological information was provided.