BRIEF DESCRIPTION: Fruiting bodies of this species are small to medium- sized.  The cap of A. rufoferruginea is 40 - 90 mm wide, yellow-brown, hemispherical, becoming convex then expanded or applanate and slightly depressed in the center, dry, fulvous or paler, with a more or less striate margin.  The cap is densely covered with brick red to orange to orange-brown to leather brown to antiques brown powdery volval remnants.  The cap's flesh is white.

The gills are free to barely attached, close, white to cream-colored, minutely floccose on the edge and ventricose.  The short gills are truncate and of diverse lengths.

The stem is 70 - 120 x 5 - 20 mm, subcylindric to narrowing upward, stuffed or hollow, and densely covered below the ring with powdery or mealy material of the same color as the volva on the cap.  On the stipe there is a basal bulb 15 - 30^± mm wide that is subglobose to spindle-shaped.  At the base of the stem, powdery, pale brown, evanescent, incomplete circles are sometimes present as volval remnants.  The stem bears a membranous, persistent, skirt-like ring that often becomes torn during expansion of the cap.  The ring's upper surface is white, and the lower surface is the same color as the volval material on the stem.

The spores measure 7.0 - 9.0 (-13.0) × 6.5 - 8.5 (-11.5) µm and are subglobose, ellipsoid, or somewhat pyriform and inamyloid.  Clamps are absent from the bases of basidia.

Amanita rufoferruginea was originally described from Japan.  It occurs in broad-leaved and coniferous forests. It is also known in China and South Korea.

Amanita rufoferruginea is characterized by its pileus and stipe surfaces' being densely covered with brick red to ferruginous or leather brown, powdery volval remnants; globose to subglobose inamyloid spores; and the absence of basidial clamps. -- Zhu L. Yang and R. E. Tulloss