The following is based in part on the original description of this species by Yang (1997).
The fruiting bodies of A. brunneofuliginea are medium-size to large. Its cap is 50 - 140 mm wide, convex to plano-convex; its center is often slightly umbonate. It is blackish brown to brown-black, becoming paler towards the margin. Its margin is tuberculate-striate (extending 10% to 30% of the cap radius), and non-appendiculate. The volval remnants on the cap are white to dirty white and patch-like. The flesh is white.
The gills of this species are free, crowded, and white. The short gills are squarely cut-off or nearly so.
The ringless stem is 80 - 220 mm long, nearly cylindric, slightly tapering upward, with the stem's very top slightly expanded. The stem is 5 mm wide at the very top and 30 mm wide near base; the upper half is white to whitish with grayish fibrils; and the lower half is grayish. The flesh of the stem is white and hollow. The stem lacks a basal bulb entirely. The volva is saccate, membranous, and rather firm. It has a free limb 25 - 70 mm high, with an outer surface that is white to dirty white and covered with leather-colored, cracked squamules. The inner surface of the volva is white..
The odor is indistinct.
The spores of this species measure (10.0-) 10.5 - 13.0 (-14.0) × (9.0-) 9.5 - 12.0 (-12.5) µm and are subglobose to broadly ellipsoid and inamyloid. Clamps are not present at the bases of basidia.
Amanita brunneofuliginea was originally described from Yunnan Province, China. It seems common in the subalpine to alpine regions of southwestern China and in northeastern parts of China.—Z.-L. Yang
Zhu L. Yang. 1997. Biblioth. Mycol. 170: 96, figs. 77-81.
3.viii.1995 Zhu L. Yang 2132 (holotype, HKAS 29508)
Weiss et al. (1998), Lehrstuhl für Spezielle Botanik und Mykologie, Bot. Int., Univ. Tübingen
The following text may make multiple use of each data field.
The field may contain magenta text presenting data from a type study
and/or revision of other original material cited in the protolog of the present taxon.
Macroscopic descriptions in magenta are a combination of data from the protolog and
additional observations made on the exiccata during revision of the cited original
The same field may also contain black text, which is data from a revision of the present
taxon (including non-type material and/or material not cited in the protolog).
Paragraphs of black text will be labeled if further subdivision of
this text is appropriate.
Olive text indicates a specimen that has not been
thoroughly examined (for example, for microscopic details) and marks other places in the text
where data is missing or uncertain.
The following material is entirely derived from the protolog of the present taxon.
NOTE: Spore measurements from papers by Z. L. Yang use his "Times New Roman" face for "Q" and "Q'"—respectively, "Q" and "Q."
Each spore data set is intended to comprise a set of measurements from a single specimen made by a single observer;
and explanations prepared for this site talk about specimen-observer pairs associated with each data set.
Combining more data into a single data set is non-optimal because it obscures observer differences
(which may be valuable for instructional purposes, for example) and may obscure instances in which
a single collection inadvertently contains a mixture of taxa.