The description of Amanita eriophora is derived from that of Bas (1969).
The cap of A. eriophora is 90 - 220 mm wide, hemispherical at first, becoming convex with a flattened center, then plane or slightly concave, sometimes with an umbo, slightly viscid, appendiculate, with a nonstriate margin. The cap is pale dingy brown to pale brownish or yellowish. The flesh is white, pinkish with age, firm, and very slowly but distinctly rufescent on bruising or cutting. The volva is present at first as a subfloccose-felted grayish umber volva of unequal thickness, later on with grayish brown, subfloccose-felted, adnate, large, flat patches and scattered, irregular more or less conical warts.
The gills are free, with slight decurrent lines on the top of the stem, crowded, and white at first and then cream.
The stem is 120 - 160 × 15 - 22 mm, solid, firm, and whitish below the grayish-brown remnants of a friable ring. Its bulb is roughly turnip-shaped and sometimes has a very distinct raised rim around its edge. At first the bulb is covered with material of the grayish brown, felted-floccose volva.
The smell of this species is described as faint, but "nutty." The taste is not recorded.
The spores measure (8.0-) 9.0 - 11.0 (-12.0) × 7.0 - 9.5 (-10.5) µm and are amyloid and broadly ellipsoid. Clamps were not found at bases of basidia.
Amanita eriophora was originally described from West Bengal, India, and has also been reported from Singapore (Corner & Bas, 1962). Little is known concerning its possible symbionts.
≡Pseudofarinaceus eriophorus (Berk.) Kuntze. 1891. Rev. Gen. Plant. 2: 868.
≡Vaginata eriophora (Berk.) Kuntze. 1898. Rev. Gen. Plant. 3(2): 539.
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.
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 data below is derived from the revisions of Corner & Bas (1962) and of Bas (1969).
Bas (1969): Basidiomes large to very large, relatively slender.
Bas (1969): 90 - 200 mm wide, pale dingy brown to pale brownish or yellowish, hemispheric then convex to planar or slightly concave, sometimes umbonate, subviscid; context white, slowly rufescent, fleshy; margin nonsulcate, appendiculate; universal veil at first as complete grayish umber covering of variable thickness, later as small to large grayish brown floccose-felted patches or subconic warts.
Bas (1969): free, crowded, white at first, becoming cream, with edge "thinly felted or appendiculate with greyish lilac remants of partial veil when young"; lamellulae attenuate.
Bas (1969): 140 - 200 × 20 - 30 mm, narrowing upward, with upper two-thirds covered by greyish lilac "floccose-felted remains of friable partial veil," with lower part pale, slightly rufescent with age; bulb more or less napiform, radicating, immarginate to marginate, 30 - 70 × 35 -55 mm; context white, rufescent, apparently solid (per figures); partial veil friable; universal veil as floccose-felted covering of bulb (at least at first), grayish umber, adnate, "forming rim or even limb at top of bulb, but sometimes bulb glabrescent."
Corner & Bas (1962), Bas (1969): Odor faint, slightly nutty. Taste not recorded.
Bas (1969): gelatinized near surface; filamentous hyphae 2 - 8 μm wide, brownish, interwoven to subradially arranged; vascular hyphae scattered, broad.
RET: 42± × 11.0± μm, 4-sterigmate; no clamps observed.
Bas (1969): On pileus: elements irregularly disposed; filamentous hyphae 5 - 15 (-20) μm wide, abundant, repeatedly branching, with many branching elements inflated; inflated cells abundant, globose to ellipsoid to clavate, up to 100 × 75 μm, with brown contents, terminal singly or in short chains; vascular hyphae broad common; clamps absent. On stipe base: not described.
Bas (1969): longitudinally acrophysalidic; acrophysalides up to 300 × 35 μm; clamps absent.
lamella edge tissue
Bas (1969): as sterile edge; inflated cells clavate, colorless, 35 - 60 × 12 - 25 μm, predominant in tissue.
Corner & Bas (1962): [-/-/-] 9.1 - 10.9 × 7.3 - 9.3 μm,
(Q = 1.10 - 1.25; Q = 1.20), hyaline, colorless, smooth, thin-walled, amyloid, broadly ellipsoid, sometimes subglobose; apiculus proportionately rather large; contents cloudy-oleaginous; color in deposit not reported. [Fresh spores are reported to measure 9.0 - 10.0 × 7.0 - 8.5 μm.—ed.]
Bas (1969): [20/2/2] (8.0-) 9.0 - 11.0 (-12.0) × 7.0 - 9.5 (-10.5) μm, (Q = 1.05 - 1.25; Q = 1.15 - 1.20), colorless, hyaline, thin-walled, amyloid, subglobose to broadly ellipsoid; apiculus not described; contents cloudy; color in deposit not recorded.
RET & CRC: [40/1/1] (6.8-) 8.8 - 10.5 (-12.6) × (6.0-) 7.8 - 10.2 (-11.5) μm, (L = 9.6 μm; W = 8.9 μm; Q = (1.0-) 1.03 - 1.20 (-1.25); Q = 1.08), hyaline, yellowish, smooth, thin-walled, strongly amyloid, globose to subglobose to broadly ellipsoid, sometimes broadened at one end, adaxially flattened; apiculus sublateral, cylindric; contents monoguttulate; color in deposit not recorded.
Bas (1969): Subgregarious. India: Terrestrial in forest. Singapore: Terrestrial in tropical forest.
Corner & Bas (1962): SINGAPORE: Reservoir Jungle, 26.iii.1931 E. J. H. Corner (L).
Bas (1969): INDIA: WEST BENGAL—Darjeeling Distr. - Darjeeling, 2.ix ca. 1848 J. D. Hooker 111 (holotype, K).
SINGAPORE: Reservoir Jungle, 26.iii.1931 E. J. H. Corner (L).
RET: CAMBODIA: SIEM REAP—ca. Kouk Dong, ca. Angkor Wat, vi.2000 David Arora 00-9 (RET 350-4).
Bas (1969): "Amanita eriophora is a large to very large, brownish species, easy to recognize because of the friable, grayish lilac partial veil leaving floccose-felted remnants at the margin of the cap, at the edges of the young gills, and especially at the upper two thirds of the stem.
"Because of the brown volva consisting of irregularly disposed, brown, inflated cells on abundant hyphae, the friable ring, the rather large, subglobose to broadly ellipsoid spores, the clampless basidia, and its large size A. eriophora resembles A. borneensis and A. berkeleyi. The volva is thicker, however, and contains more broad hyphae and more conspicuous, irregular, branching elements than in those two species. These last two characters of A. eriophora in addition to the rufescent flesh and the sometimes marginate bulb suggest a realtionship with A. sculpta."
This species was observed (but not collected) by Corner in Malaysia (Tebrau, Johor, 24.ix.1939).
—R. E. Tulloss
Information to support the viewer in reading the content of "technical" tabs
can be found here.
(Berk.) E.-J. Gilbert
1. Amanita eriophora, Singapore.
2. Amanita eriophora, Singapore.
3. Amanita eriophora, Singapore.
Drawings: Prof. E. J. H. Corner or Dr. C. Bas (Singapore, illustration from original description (Corner and Bas, 1962)
reproduced by courtesy of Persoonia, Leiden, the Netherlands.)
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.