The original description of this species can be found in (Zhu L. Yang
& Yochim. Doi, 1999).
The fruiting bodies of A. orientigemmata are
small to medium-sized. The cap is 50 - 100 mm wide, at
first hemispherical, then becomes convex to plano-convex, occasionally
slightly depressed at center, moderate greyish yellow to light yellow, and somewhat darker in the center.
It is covered with felty, floccose patches or small subconical warts which are 1 - 4 mm
wide, up to 1.5 mm high, and whitish. The cap's margin is short-striate
and nonappendiculate. Its flesh is white.
The gills of this species are free, crowded, white to cream-colored; and
the short gills are truncate and of diverse lengths.
The stem is 50 - 110 × 10 - 15 mm, subcylindric to attenuate upwards; its
surface is whitish to white and covered with fibrillose squamules. The
stem's basal bulb is 20 - 30 mm wide, ovate to subglobose; and its
volva is short and appressed limbate or is a floccose, white to
yellowish group of patches or warts near the bulb's apex. The annulus
is white to yellowish, and often torn from the stem during expansion
of the pileus.
Spores of A. orientigemmata measure (7.5-) 8.0 - 10.0 (-11.0) x
(6.0-) 6.5 - 7.5 (-8.0) µm and are broadly ellipsoid to ellipsoid
and inamyloid. Clamps are present on the bases of basidia.
Amanita orientigemmata occurs in mixed forests with broad-leaved trees and conifers. Its
distribution range is from Japan to China.
Amanita orientigemmata is characterized by its grayish yellow to light yellow pileus with
whitish, felted volval patches or warts, inferior and fugacious
annulus, limbate volva, inamyloid, broadly ellipsoid to ellipsoid
spores, and the presence of basidial clamps.
It differs from A. gemmata (Fr.) Bertillon in its presence of clamps, slightly smaller spores,
and different structure of volval remnants on the cap. The volval
remnants on cap of Amanita gemmata from Europe dominantly consist of irregularly to
subradially arranged, filamentous hyphae, mixed with scattered to locally fairly abundant inflated cells.
In Japan, the species was originally described from Fir-Chinkapin (Abies-
Castanopsis) forest. Amanita orientigemmata has been
collected in coniferous as well as mixed and broadleaved forests in
northeastern and southeastern China. - Zhu L. Yang
["orientogemmata"] Zhu L. Yang & Yoshim. Doi. 1999. Bull. Natl. Sci. Mus., Tokyo, Ser. B 25(3): 107, figs. 1-4.
Zhang et al. (2004), Key Lab. Biodivers. Biogeogr., Kunming Inst. Bot., Yunnan, China
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 on 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."
from Yang et al. (2001): [25/1/1] (7.0-) 8.0 - 10.0 (-10.5) × (5.5-) 6.0 - 7.0 (-7.5) μm, (Q = (1.08-) 1.18 - 1.50 (-1.55); Q = 1.36 ± 0.11), broadly ellipsoid to ellipsoid, rarely subglobose, colorless, hyaline, thin-walled, inamyloid.
from Yang (2002a): [20/1/1] (8.5-) 9.0 - 10.5 × 7.5 - 8.5 (-9.0) μm, (Q = 1.13 - 1.24 (-1,27); Q' = 1.19 ± 0.04), hyaline, colorless, smooth, thin-walled, inamyloid, broadly ellipsoid, sometimes subglobose; apiculus proportionately small; contents not recorded; color in deposit not recorded.
Solitary to gregarious. China: On soil in forest.
Japan: In Abies-Castanopsis forest.
from the protolog:
HONSHU—Tottori Prefecture - Tottori City, Ôchidani [Pk.?], 8.ix.1979 E. & F. Nagasawa s.n. (paratype, TNS-F-198540), 9.ix.1979 E. & F. Nagasawa s.n. (paratype, TNS-F-198546), 12.ix.1979 E. & F. Nagasawa s.n. (holotype, TNS-F-198537).
Yang et al. (2001): CHINA:
HAINAN—Ledong Li Autonomous Co. - Jianfengling, 26.ix.1987 T. H. Li s.n. (HMIGD 12446a, as "Amanita bingensis" in Bi et al (1997)).
Yang (2002a): CHINA:
JILIN—Yanbian Korean Autonomous Prefecture - Antu Co., Mt. Changbai, s.d. Y. Wang 811333 (IFP).
Zhang et al. (2004) voucher for sequencing: CHINA: YUNNAN—Unkn. loc., s.d. unkn. coll. s.n. (HKAS 38345).
—Z. L. Yang and R. E. Tulloss
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