BRIEF DESCRIPTION: The following description is based on the original description by Coccia and Migliozzi (2000).

The cap of A. luteovergens is 60 - 100 (-110) mm wide, very pale with tints of beige or of hazelnut brown, subglobose to hemispherical at first, eventually broadly convex to plano-convex with an irregular central depression in adult material, viscid in humid conditions, with a long striate margin [illustrations show striations occupying less than 20% of the cap radius]. The volva remnants are sparse and in the form of small patches or warts or smaller fragments. The flesh is thick over the stem, thinning towards the margin, and white, becoming pale chrome yellow when cut..

The gills are free, close, white, rounded at the cap margin, with an even edge. Short gills are scarce.

The stem is 70 - 100 (-120) × 15 - 17 (-25) mm, white, subcylindric, narrowing upward, initially appearing solid, then stuffed and soon hollow. A ring is absent. The saccate volva is whitish and fragile. The flesh is white, becoming pale chrome yellow when cut.

The spores measure (11-) 12 - 13 × (7.5-) 8 - 9 (-10) µm and are ellipsoid and inamyloid. Clamps are absent from bases of basidia.

This species was originally described from Rome (Italy) under pine (Pinus pinea) in soil that is mostly composed of sand.

The authors produced a beautifully illustrated version of the original description which was published in the special Amanita issue of the Bullettino del Gruppo Micologico G. Bresadola - nuova serie (2000). Based on the illustrations and descriptions in this paper, it would appear that the authors recognize that Amanita mairei Foley (= A. griseocastanea Coccia & Migl.) can produce very pallid, or albino, fruiting bodies. These appear to differ from A. luteovergens only in the fact that the latter has yellow staining flesh. We are familiar with the present species only from the original description and the additional illustrations just mentioned. However, we think it is worth exploring the question of whether the staining which is the fundamental reason for the segregation and naming of A. luteovergens might not be a case of the yellowing syndrome which we have discussed other places on this site. Yellow bruising reactions have rarely, if ever, been reported previously in section Vaginatae. If the holotype of the present species were a "victim" of the yellowing syndrome, A. luteovergens could be a further synonym of A. mairei.