The flesh is 3–7 millimetres (1⁄8–1⁄4 in) thick over the stem, thinning evenly to the margin, white or yellowish, bright yellow just under the cap skin.

The gills are free to very narrowly adnate, subcrowded to crowded, creamy ivory to cream to off-white, 3–8 mm broad, with a white pulverulent edge and also a small decurrent tooth.

The volva is absent or present as rings of yellow-brown warts on the bulb or brilliant yellow loose patches appressed to the stem and are large, friable, detersile, sometimes lost during collecting.

A. flavorubens was originally described from the U.S. state of Ohio, and is also known from forests associated with beech (Fagus grandifolia), oak (Quercus), pine (Pinus), birch (Betula), and Canadian hemlock (Tsuga canadensis) from south-eastern Canada to the state of Alabama in eastern North America, central Mexico, and south-eastern Arizona.

A. flavorubens is one of the few taxa in North America that are known to have a western population disjunct from an eastern primary area of distribution.