The following description is based on Beeli (1935).
The cap of Amanita albopulverulenta is 40 - 50 mm wide, plano-convex, depressed in the center, umbonate, with a long-striate margin. The white cap is covered with small, pale brownish-gray, flocculent remains of the volva. The flesh is thin, firm, and white.
Gills are free, close, white, thin, fragile, pointed at both ends, 5 - 6 mm broad, with an uneven margin. The short gills are nine times more plentiful than normal gills.
Its stem is 70 - 90 × 5 - 8 mm, stuffed, cylindric, fibrillose, smooth, and white. The ring is absent. The bulb is very small. The volva is present as a flocculose layer on top of the bulb and whitish.
This species lacks an odor. Its taste is reportedly sweet with an acrid aftertaste.
The spores measure 4 - 5 × 2.5 µm and are elongate to cylindric and inamyloid. No information is available concerning basidial clamps. Unfortunately, the present species was not treated by Gilbert; and we have no information to compare with Beeli's information on spore size. As noted elsewhere in these pages, Beeli had a tendency to understate the size of small spores.
The present species was originally described from the Democratic Republic of Congo where a single specimen was found in dry forest.
If this species is indeed an Amanita (as seems likely), it appears to be most similar to the group of taxa associated with A. farinosa Schwein. The present species is very poorly known. Based on its apparent similarity to A. farinosa, A. albopulverulenta may lack clamps at the bases of its basidia.—R. E. Tulloss
(Beeli) Tulloss in Tulloss et al. 2015. Amanitaceae 1(2): 1.
≡Amanita albopulverulenta (Beeli) Tai. nom. inval. 1979. Syll. Fung. Sinicorum (Peking): 373. [n.v.] [Lacking full and direct reference to basionym (per Index Fung. 5(2): 41). ICBN §33.2. Misapplied.]
The editors of this site owe a great debt to Dr. Cornelis Bas
whose famous cigar box files of Amanita nomenclatural information
gathered over three or more decades were made available to RET for computerization
and make up the lion's share of the nomenclatural information presented on this site.
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The following material is derived from the protolog of the present taxon. Unfortunately, Gilbert did not revise material of this species in his work on the Amanitaceae.
from protolog: 40 - 50 mm wide, white, broadly convex, slightly umbonate; context white, firm, thin, fleshy; margin striate (ca. 0.75R per figure); universal veil as covering of small warts, flocculose, pallid.
from protolog: free, close, white, thin, fragile, acute at both ends; lamellulae not described.
from protolog: 70 - 90 × 5 - 8 mm, white, cylindric, smooth, fibrillose; bulb small; context hollow, firm, fibrous, white; exannulate; universal veil on upper surface of bulb, whitish, friable, flocculose.
from protolog: Odorless. Taste sweet, with acrid aftertaste.
lamella edge tissue
from protolog: 4 - 5 × 2.5 μm, hyaline, smooth, inamyloid, ?elongate to ?cylindric, at least sometimes adaxially flattened (per figure); apiculus sublateral (per figure); contents "finely guttulate"; white in deposit. [Note: Inufficient data for sporograph generation. As noted elsewhere in these pages, Beeli frequently underestimated the size of small spores.—ed.]
from protolog: Solitary. Terrestrial in dry foreset.
from protolog: CONGO, DEMOCRATIC REPUBLIC OF: PROV. EQUATEUR—Territoire Lisala - Binga [2°23'41" N/ 20°25'25" E, 361 m], iv.1931 M. Goossens-Fontana 927 (holotype, BR, watercolor).
From the protolog, which includes a reproduction of the watercolor of Mme. Goossens, this species may belong in the editors' provisional Amanita series Farinosae. In this group it is distinguished by at least its apparent lack of pigment and the reported narrowness and small size of its spores. A revision of the type collection is needed.
—R. E. Tulloss
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