For the most part, the data below is derived from the original description (Yang 1997).
The fruiting bodies of A. tomentosivolva are medium-sized. Its cap is 55± mm wide and convex to plano-convex. The center of the cap is slightly umbonate. The cap is brown to brownish, becoming darker at center, and undecorated. Its margin is tuberculate-striate (with striations extending to about 30% of the cap radius), and non-appendiculate. The cap also has a darker colored ring-like zone at the inner ends of the marginal striations. The cap's flesh is white.
The gills of this species are free, crowded and white with gray to grayish free edges. The short gills are squarely cut-off or nearly so.
The ringless stem is 140 × 7 - 12 mm, nearly cylindric or slightly tapering upward, and hollow. The stem has a whitish background color with gray squamules. Its flesh is white;, and there is no basal bulb. The volva is saccate, 45 × 15 mm, membranous, firm, with a free limb. The outer surface of the volva has a white background decorated with rust-brown, felty to floccose, irregularly formed patches or warts.
The odor is indistinct.
Spores of this species measure (11.0-) 11.5 - 14.0 × (10.5-) 11.0 - 13.5 µm and are globose to subglobose and inamyloid. Clamps are not present on the bases of basidia.
Amanita tomentosivolva was originally described from Yunnan Province, China. It is probably a subtropical to tropical species.—Z.-L. Yang
Zhu L. Yang. 1997. Biblioth. Mycol. 170: 107, figs. 87-89.
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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).
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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 derived directly 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.