This description is
based on the original one of Corner and Bas (1962).
The cap of Amanita privigna is 50 - 60 mm wide, becoming
subumbonately plano-convex, livid, umber, fuliginous
umber at the center, paler and finely innately streaked
toward margin, slightly viscid, smooth, glabrous, with a
smooth margin. The cap flesh is white, fairly firm, 4 - 5 mm
thick in center, and thinning toward the margin.
The gills are free, rather crowded, narrow, white, and becoming pale cream.
The stem is 50 - 60 × 10
-12 mm, white with small, pale gray, floccose-scurfy
patches or fibrils, and pure white at the apex. The volva
is 8 - 12 mm high, white at the base, and rather firm.
The spores measure 7.4 - 9.0 × 6.7 - 8.5 µm and are globulose to subglobulose
(sometimes broadly ellipsoid). Clamps were not observed
at bases of basidia.
The present species was originally described from
a single specimen collected in Singapore. The authors of the
species suggest comparisons to A. fuliginea Hongo and
A. alauda Corner & Bas.
No associated plants were reported.—R. E. Tulloss
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The following material is derived entirely from the protolog of the present taxon.
from protolog: 50 - 60 mm wide, livid umber, fuliginous umber in center, paler and more finely innately streaked toward margin, becoming subumbonately plano-convex, slightly viscid, smooth: context white, fairly firm, 4 - 5 mm thick over stipe, gradually thinning toward margin; margin nonstriate; universal veil absent.
from protolog: free, rather crowded, white, becoming pale cream, narrow, 3 - 4 mm wide, with 70 primaries; lamellulae obliquely truncate to attenuate, with 1 - 3 between each pair of otherwise adjacent lamellae.
from protolog: 50 - 60 × 7 - 8 mm (width measured at apex), white, pure white at extreme apex, subcylindric, with small pale gray floccose-scurfy patches or fibrils above and below partial veil; bulb 10 - 12 mm wide; context white; partial veil 8 - 12 mm broad, pendant from about 10 mm below apex of stipe, membranous, gray, finely striate on upper side, smooth on underside, fairly firm and persistent; universal veil 8 - 12 mm high, with lower third attached to subbulbous base of stipe, with upper two- thirds forming slightly spreading fleshy-membranous limb split into four parts, mostly pale gray, white at base, rather firm, in dried specimen constricted at connection with stipe.
Odor and taste not recorded.
from protolog: gelatinized near surface; filamentous hyphae 2 - 6 µm wide, radially oriented, with pale brown intracellular pigment.
from protolog: 4-sterigmate; clamps not observed.
from protolog: On stipe base, outer surface layer: filamentous hyphae interwoven, up to 5 µm wide, irregular. On stipe base [probably interior layer]: filamentous hyphae not described; inflated cells densely distributed, clavate, infrequently globose (e.g., 80 × 45 µm, 130 × 25 µm, 60 × 60 µm, etc.).
lamella edge tissue
from protolog: inflated cells 20 - 45 × 10 - 40 µm, clavate or pyriform or globose, colorless, thin-walled, forming sterile edge or lamella.
from protolog: [-/1/1] 7.4 - 9.0 × 6.7 - 8.5 μm, (Q = 1.0 - 1.20; Q = 1.05 - 1.10), hyaline, colorless, smooth, thin-walled, amyloid, globose to subglobose, sometimes broadly ellipsoid;apiculus proportionately small; contents cloudy vitreous; color in deposit unrecorded. [Fresh spores reported to measure 8.0 - 9.0 × 7.0 - 8.0 μm.]
from protolog: Solitary. Terrestrial in forest.
from protolog: SINGAPORE: Bukit Timah, 16.viii.1939 E. J. H. Corner s.n. (holotype, L).
from protolog: "The present species belongs to the dark-colored, volvate species with globose spores of section Phalloideae.
Amanita fuliginea Hongo (1953: 69) from Japan is similar. However, an examination of authentic material of that species (Hongo 711, 4 Aug. 1953, Mii-dera, Otsu) kindly put at our disposal by Dr. T. Hongo, showed that the cuticle of that species is quite different, viz. only slightly gelatinized and with 5 - 8 (-18) µm wide, repent, subradial, dark brown hyphae. Moreover, the stipe of A. fuliginea is brownish squamulose-fibrillose, the volva is white, and the ring turns brownish.
Amanita alauda Corner & Bas differs by the rather conspicuously streaked cuticle with 3 - 10 (-15) µm wide hyphae and the white stipe, ring, and volva."
—R. E. Tulloss
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