The cap of Amanita berkeleyi is 125 - 175 mm wide, plano-convex, ultimately somewhat depressed around a low, broad umbo, fleshy, sooty gray to grayish brown, sometimes with a yellowish tinge at the center, dry and rather shiny, at first with a slightly inflected and fuzzy margin, becoming straight and sometimes slightly sulcate with age. The cap is almost completely covered with very thin, concolorous or slightly darker, felted-pulverulent, crust-like remnants of volva sometimes breaking up into minute, thin, polygonate patches, especially at the center.
The gills are crowded, white, moderately broad to broad, and free to slightly adnexed.
The stem is 200 - 225 × 25 - 38 mm, sometimes subcylindrical, solid, concolorous with the cap or slightly paler, exannulate, somewhat floccose-scaly to fibrillose-scaly; remnants of volva are absent or scarce.
This species is reported to have no odor.
The spores measure 9 - 10.7 (-12.6) × 8.3 - 8.5 (-10.3) µm and are amyloid and globose to broadly ellipsoid. Clamps are not observed at bases of basidia.
This species was originally described from West Bengal, India at an elevation between 2000 and 2500 m. No information is available concerning its potential symbionts. I do not know of any material of this species that has been collected in recent years and reported in detail.
(Hook. f. in Berk.) Bas. 1969.
Persoonia 5: 476, figs. 231-232.
≡Agaricus (Amanita ) berkeleii Hook. f. in Berk. 1850. J. Bot. Kew Gard. Misc. 2: 43.
≡Amanitopsis berkeleyi (Hook. f. in Berk.) Sacc. 1887. Syll. Fung. 5: 24.
≡Pseudofarinaceus berkeleyi (Hook. f. in Berk.) Kuntze. 1891. Rev. Gen. Plant. 2: 868.
≡Vaginata berkeleyi (Hook. f. in Berk.) Kuntze. 1898. Rev. Gen. Plant. 3(2): 539.
=Agaricus (Amanita ) regalis Berk. 1850. J. Bot. Kew Gard. Misc. 2: 42.
≡Amanitopsis regalis (Berk.) Sacc. 1887. Syll. Fung. 5: 25.
≡Pseudofarinaceus regalis (Berk.) Kuntze. 1891. Rev. Gen. Plant. 2: 868.
≡Vaginata regalis (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.
Due to delays in data processing at GenBank, some accession numbers may lead to unreleased (pending) pages.
These pages will eventually be made live, so try again later.
Agaricus berkeleyi & Agaricus regalis—K
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 following material is derived from the revision of Bas (1969). This data is a composite of Bas' study of the two relevant types. Magenta type will be used although this is possibly a special case of its usage because of the aforementioned mixture of data.
Bas (1969): Basidiomes large to very large, relatively slender.
Bas (1969): 125 - 175+ mm wide, sooty gray to grayish brown, sometimes with yellow tinge over disc, plano-convex, in age somewhat depressed around low broad umbo, dry, rather shiny; context fleshy; margin "at first slightly inflected and fuzzy," becoming straight, sometimes slightly striate with age; universal veil as nearly complete thin crust-like covering, concolorous or slightly darker, felted-pulverulent, sometimes breaking up into minute, polygonal patches (especially over disc).
Bas (1969): free to slightly adnexed, crowded, white, ventricose, moderately broad to broad, sometimes with irregularly crenulate edge; lamellulae not described.
Bas (1969): 200 - 225 × 25 - 38 mm, concolorous with pileus or slightly paler, sometimes subcylindric, sometimes clavate, somewhat floccose-scaly to fibrillose-scaly; bulb somewhat indistinct to distinct from stipe, sometimes somewhat radicating; context solid, white or (in places) grayish-brownish, "firm or even tough"; exannulate; universal veil absent or scarce, "in preserved material perhaps hidden by adhering soil particles.
Bas (1969): divided into two thick layer, gelatinized suprapellis (including rather distant irregularly disposed thin hyphae) and ungelatinized subpellis; filamentous hyphae narrow, crowded, brownish in subpellis, narrow.
Bas (1969): longitudinally acrophysalidic; acrophysalides up to 360 × 32 μm; vascular hyphae present; clamps not observed.
lamella edge tissue
Bas (1969): [23/2/2] 8.0 - 10.5 (-13.5) × 6.5 - 9.5 (-12.0) μm, (Q = 1.0 - 1.3; Q' = 1.15), globose to broadly ellipsoid, thin-walled, smooth, colorless, hyaline, amyloid, globose to subglobose to broadly ellipsoid; apiculus not described; contents not described; color in deposit not recorded.
Bas (1969): India: At ca. 2000-2500 m elev. Terrestrial.
Bas (1969): INDIA: WEST BENGAL—Darjeeling Distr. - Darjeeling, summer ca. 1849 J. D. Hooker 93 (holotype with watercolor drawing of Agaricus berkeleii, K); ca. Darjeeling, Jilla Pahar [a place higher and more open than the old Darjeeling "station," Jilla Pahar was the location of a military convalescent facility during colonial times], 26.viii ca. 1849 J. D. Hooker 108 (holotype with water color drawing, K). [Note: Copies of drawings are deposited in L.]
Bas (1969): "Amanita berkeleyi is a very large, brown species with a rather thin, friable, brown volva, a friable, brown partial veil, and rather large, globoe to broadly ellipsoid spores. Clamps are probably absent but because of the poor condition of the collections available it was impossible to examine the basidia for this. Several other characters of ths species have still to be verified as well. Yet there is little doubt about its taxonomic position. It resembles A. borneensis so strongly (see more detailed comparison...) that it must certainly be placed near that species, which is better known. [See "discussion" data field of the technical tab for A. borneensis.—ed.
"According to the protolog, Agaricus regalis differs from Amanita berkeley mainly in the thin, sulcate-striate margin, abruptly bulbous base and reddish tinge of the bulb. In the type material and teh type drawing neither the sulcate margin nor the bulbous base is impressive. The term 'sulcato-striate' in the diagnosis is especially misleading. The reddish tinge of the bulb is pale ferruginous in the drawing and seems of little importance. The spores and the structure of the volva are similar to those of A. berkeleyi. I am convinced that the type of Agaricus regalis is an old specimen of A. berkeleyi, which explains why the margin of the cap is slightly sulcate. The habit, the colours, and the lacking annulus of Agaricus regalis support the supposed identity with Amanita berkeleyi. Further Agaricus berkeleyi is said to be not rare around Darjeeling, whereas A. regalis was collected only once.
"Agaricus berkeleyi and A. regalis were published simultaneously but since the combination Amanita regalis is preoccupied Agaricus berkeleyi is the correct name."
—R. E. Tulloss
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(Hooker f. in Berk.) Bas
1. Amanita berkeleyi, West Bengal, India.
Dr. C. Bas, 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.