BRIEF DESCRIPTION: All information is taken from Corner and Bas (1962).

The cap is 50 - 60 mm wide, at maturity plano-convex, subumbonate, with a smooth margin. Its color ranges from livid umber to fuliginous umber over the stem and is paler and innately streaked toward the margin. The context is white (the watercolor shows a pigmented layer below the pileipellis), fairly firm and 4 - 5 mm thick over the stem.

The gills are free, rather crowded, 3 - 4 mm broad, and white at first, becoming pale cream. The short gills are obliquely truncate to attenuate, and 2 or 3 are present between each pair of gills.

The stem is 50 - 60 x 7- 8 mm (width measured at apex) and subcylindric, with a bulb 10 - 12 mm wide. It is pure white at the apex and white with "small, pale gray, floccose-scurfy pathces or fibrils above and below" the annulus. The annulus is 8 - 12 mm broad, "pendant from about 10 mm below" the stipe apex, "fairly firm and persistent, gray," finely striate above and smooth below. The volva is limbate and 8 - 12 mm high the lower third to half is attached to the stipe's bulb. The limb is fleshy-membranous and splits into 4 parts; it is pale gray except for a white base. In dry material, it appears to connect with the bulb at the base of the stipe rather than as shown in the watercolor.

The spores from dried material measure 5.9 - 7.8 x 4.1 - 6.2 µm (from fresh material, 7.0 - 9.0 x 5.5 - 7.0 µm) and are subglobose to broadly ellipsoid to ellipsoid and amyloid. Clamps were not observed at the bases of basidia.

Amanita modesta was originally described from tropical rain forest in Singapore and Malaya.

Its authors compared it with A. elephas Corner & Bas. It should be treated as deadly poisonous until more is known of this species.