The cap of Amanita pilosella is 25 - 70 mm wide, convex to plane or somewhat concave, sometimes slightly umbonate, dry, umber, fuliginious or grayish brown, paler on expansion, with a smooth to faintly striate margin. The cap has innate, dark fibrillose streaks, minutely dark grayish-brown, fibrillose-subvillose, especially toward the margin, with powdery-subvillose, umber, fuliginous or blackish remnants of volva. The remnants of volva form a scurfy-pruinose covering, especially near the margin, or thin, flat patches or irregular warts and sometimes conical warts on the center of the cap.
The gills are free, crowded, white or grayish-white.
The stem is 40 - 110 × 3.5 - 6 mm, attenuate upward, solid, entirely gray, fuscous-gray, grayish umber or fuscous with dark fibrillose, innate streaks, subfibrillose to subflocculose and grayish patches above the ring.
Odor and taste were not recorded for this mushroom.
According to the original description (1962), spores from dried material
measure 6.4 - 8.5 (-10.1) × 4.7 - 6.4 µm (from fresh material, 7 - 9.5 × 5 - 6.5 µm) and are broadly ellipsoid to ellipsoid
(occasionally, subglobose) and amyloid. Clamps were not observed at the bases of basidia.
The spores from Chinese material (Yang, 1997)
measure (6.5-) 7.0 - 9.0 (-12.5) × 5.5 - 7.0 (-9.0) µm.
This species was described from Singapore. Its range is known to extend to Yunnan Prov., China.—R. E. Tulloss
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L (in liquid)
Z. L. Yang. 1997. Biblioth. Mycol 170: 189, figs. 155-159.
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 not directly from the protolog of the present taxon and not cited as the work of Dr. Z. L. Yang or another researcher is based upon original research by R. E. Tulloss.
NOTE: Spore measurements from papers by Z. L. Yang use his "Times New Roman" face for "Q"
and "Q'"—respectively, "Q" and "Q."
Note: This page applies strictly to A. pilosella f. pilosella—the type form. For f. atroconica go here.
from protolog: 25 - 35 mm wide, umber or fuliginous or grayish brown, paler on expansion especially toward margin, with innate dark fibrillose streaks, minutely dark grayish brown fibrillose-subvillose especially toward margin, convex to planar or somewhat concave, sometimes slightly umbonate, dry (perhaps slightly viscid when old); context white or slightly brownish, 1.5 - 4.5 mm thick in disc, otherwise, thin; margin smooth to faintly striate; universal veil as powdery-subvillose remnants forming thin scrufy-pruinose covering (especially near margin) or irregular warts (1 - 3 mm wide), umber, fuliginous or blackish.
from protolog: free, crowded, white or grayish-white or fuliginous-umber,with edges white, 50 - 90 primaries; lamellulae attenuate, (0–) 1 – 3 between each pair of otherwise adjancent lamellae.
from protolog: 40 - 110 × 3.5 - 6 mm wide (width measured at apex), entirely gray, fuscous-gray, grayish umber or fuscous, with dark fibrillose innate streaks, subfibrillose to subflocculose, with grayish patches above ring from fragmented partial veil, narrowing upward; context solid; bulb subclavate to bulbous, 5 - 12 mm wide; partial veil 15 - 30 mm below apex of stipe, rather narrow, pendent, floccose-membranous, dark to pale gray and striate above, grayish and fuliginous pruinose or flocculose below, with fuliginous to blackish edge slightly thickened and entire and pruinose-flocculose; universal veil as one to several mostly incomplete rows of fuliginous to blackish, minute, pruinose-felted patches on upper part of basal bulb or as entirely fuliginous pruinose-felted covering of upper bulb.
from protolog: On pileus: filamentous hyphae rather frequent; inflated cells dominating, globose, large (up to 100 µm wide), mainly terminal, brown. On stipe base: not described.
lamella edge tissue
from protolog: [-/-/-] (5.5-) 6.4 - 7.9 × (4.3-) 5.1 - 7.0 μm, (Q = (1.05 - 1.30 (-1.40); Q = 1.15 - 1.20), hyaline, colorless, smooth, thin-walled, amyloid, subglobose to broadly ellipsoid, infrequently ellipsoid; apiculus proportionately rather small; contents cloudy-vacuolate to multiguttulate; color in deposit not recorded. [Fresh spores reported to measure 7.0 - 10.0 &mtimes 5.5 - 8.0) μm.]
from protolog: Singapore: Solitary, frequent every rainy season. Terrestrial in tropical forest.
from Yang (1997): Solitary or in small groups. China: At 1000 - 2000 m elev. In broad-leaved forest with representatives of the Fagaceae such as species of Lithocarpus and Castanopsis.
from protolog: SINGAPORE: Botanic Gardens, Gardens' Jungle, 30.viii.1944 E. J. H. Corner s.n. (paratype, L, annotation only); Bukit Timah, 21.viii.1939 E. J. H. Corner s.n. (paratype, L; also paratype of A. pilosella f. atroconica); Reservoir Jungle, 10.iv.1941 E. J. H. Corner s.n. (holotype, L, in liquid, with watercolor drawing); unkn. loc., 23.iv.1940 E. J. H. Corner s.n. (paratype, L in liquid, also holotype of A. pilosella f. atroconica).
from Yang (1997): CHINA:
YUNNAN—Pu'er (prefecture level) City - Simao District, 1450 m elev., 3.viii.1991, Z. L. Yang 1358 (HKAS 24179). Wenshan Zhuang and Miao Autonomous Prefecture - Maguan Co., Gulinjung, 2000 m elev., 29.vi.1992 Z. L. Yang 1818 (HKAS 32517).
Xishuangbanna Dai Autonomous Prefecture - Jinghong City, Jinuoshan, 1000 m elev., 3.xi.1989 Z. L. Yang (HKAS 22525).
from protolog "This small to medium-sized species evidently belongs to the difficult group of dark-colored species within section Validae. It is, however, easy to distinguish by the dry cuticle with elongate, inflated, slightly protruding cells.
"The remnants of the volva on the pileus vary considerably as to size and form, hence, the two forms here distinguished.
"The senior author already separated both forms in his field-notes on account of the difference in color of the edge of the gills. However, the material available being scanty, the taxonomical importance of these two forms is uncertain.
"Amanita pilosella is undoubtedly closely related to A. spissacea Imai from Japan, which has the same dark brown pileus with darker grayish pulverulent patches from the volva, the same pulverulent gray remnants of the volva on the base of the stipe and the same spores. However, A. spissacea is larger and considerably fleshier, has an umbonate pileus and a dark squamulose covering of the stipe below the ring; its cuticle seems to lack the streaky appearance of that of A. pilosella.
Amanita neglecta (Boedijn (1951: 324) seems to be related, too. In that species, however, the colors are different, viz. the cap is dirty brown and the stipe is pinkish buff with appressed darker scales below the pale yellow ring."
Both the taxa were included by Corner among his collections labeled "Amanita1." They are differentiated by pileus diameter, the color of the edges of the lamellae, and the form and microscopic anatomy of the universal veil remnants on the pileus.
—Z. L. Yang, R. E. Tulloss
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Amanita pilosella f. pilosella
Corner & Bas
"Little Hairs Amanita"
1. Amanita pilosella
2. Amanita pilosella
Watercolor: Prof. E. J. H. Corner (Singapore, illustration from original description
(Corner and Bas, 1962) reproduced by courtesy of Persoonia, Leiden, the
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