BRIEF DESCRIPTION: This description is based on that of Bas (1969).

The cap of Amanita sublutea is 30 - 45 mm wide, convex to plano-convex with a slightly depressed center, pale buff, viscid when moist, slightly appendiculate, with a nonsulcate margin.  The cap is covered with vague and very thin, felted, concolorous, inconspicuous, crust-like remnants of volva over the center.

The gills are subdistant, narrowly adnate, rather broad, and white.  The short gills are truncate to obliquely truncate and rather scarce.

The stem is 35 - 45 x 6 - 10 mm, equal, exannulate, with inconspicuous, very narrow, pale, submembranous volval limb on the margin of the bulb.

The spores measure (11-) 11.5 - 13 (-13.5) x 6.5 - 7.5 (-8) µm and are amyloid and elongate (rarely cylindrical, sometimes slightly obovoid). Clamps are absent at bases of basidia.

Amanita sublutea was originally described from the state of South Australia.   No associated plants were listed by Cleland.