The following description is based on Beeli (1935) and Gilbert (1941).
The cap of Amanita fulvosquamulosa is 80 mm wide, plano-convex, with thin flesh and a smooth margin. The cap is brown-tawny with a slightly prominent umbo and many pale squamules from the volva. The flesh is white.
The gills are free, rounded at the stem end, 8 mm broad, white. The form of the short gills is not known.
Its stem is 110 × 11 mm, cylindrical, totally elongating, curved right, stuffed, undecorated, and white or slightly tinted pink. The ring was described as pulverulent and superior, white. The volva is membranous, ample, and white.
The odor and taste of this species were not recorded.
The spores of this species measure 8.0 - 11.0 × 4.5 - 6.0 μm [as measured from the spore drawings of Gilbert (1940)] and are elongate on average and amyloid.
The present species was originally described from the Democratic Republic of Congo in dry forests.
The totally elongating stipe, narrow spores, colors of the cap and volva, very thick volval sac, pinkish tint to the stem, and the floccose upper stipe all support the placement of the present species in section Amidella. Compare to other species described by Beeli—A. goossensiae and A. fulvopulverulenta—and to A. sp-Arora-01-560.—R. E. Tulloss
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The following material is derived from the protolog of the present taxon, (Beeli 1935), and (Gilbert 1940 & 1941).
from protolog: 80 mm wide, brown-fauve, with slight central umbo; context fleshy, thin; margin not described; universal veil as covering of pale flat scales, with approximate radial orientation (per figure).
Beeli (1935): addition—margin nonstriate and appendiculate (both per figure).
from protolog: free, white; lamellulae not described.
Beeli (1935): additions—rounded toward stipe, 8 mm broad.
from protolog: 110 × 11 mm, whitish or lightly tinted red-brown, cylindric, glabrous below apical flocculence (per figure), totally elongating; contents hollow; partial veil superior, white, very ephemeral, pulverulent or flocculose (per figure); universal veil membranous, ample, whitish, thick (per figure).
Beeli (1935): filamentous hyphae present; excretive [?vascular] hyphae present. [Note: Mucronate cells are reported, but these may be from the universal veil.—ed.]
lamella edge tissue
from protolog: 9 - 10 × 5 - 6 μm, hyaline, smooth, bean-shaped. [Note: Sporograph not generated.—ed.]
Beeli (1935): additions: ellipsoid, amyloid; white in deposit.
Gilbert (1940): [6/1/1] 8.0 - 11.0 × 4.5 - 6.0 μm, (L = 9.3 μm; W = 4.9 μm; Q = 1.63 - 2.44; Q = 1.91), hyaline, smooth, amyloid, elongate to cylindric, often adaxially flattened (per figure); apiculus sublateral and subcylindric or narrowly truncate-conic (all per figure); contents not described; white in deposit. [Note: Spore measurements are taken from the six drawings of (Gilbert 1940: tab. XXVIII (fig. 4)) that are in apparent lateral view.—ed.]
from protolog: Solitary. Terrestrial in dry forest.
from protolog: CONGO, DEMOCRATIC REPUBLIC OF: PROV. EQUATEUR—Territoire Lisala - Lisala, Valley of Motima River [2°09'01" N/ 21°30'59.5" E, 377 m], iii.1924 Goossens 405 (holotype, BR).
The pigmentation, flocculent annular zone, totally elongating stipe, thick fleshy saccate volva with an inner later left as scales on the pileus, and amyloid and apparently elongate spores all argue for probable placement of this species in Amanita sect. Amidella.
A Zambian collection somewhat similar to A. fulvosquamuloa but having apparently narrower spores is A. sp-Arora-10-560. Sporographs of the two species are compared in the following figure:
For further discussion see the technical tab of the page for A. goossensiae.
—R. E. Tulloss
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