The fruiting bodies of Amanita
ovalispora are small to medium-sized. Its cap is 40
- 70 mm wide, applanate, and sometimes slightly depressed
in the center. It is gray to dark gray and glabrous and
occasionally covered with white, membranous volval
remnants. The margin is tuberculate-striate (30% to 40%
of radius) and non-appendiculate, and the context is white.
The gills are free, white, becoming
grey to brownish; and the short gills are truncate.
The exannulate stem is 60 - 100 × 6
- 15 mm, subcylindric or slightly attenuate upwards,
fistulose, with a surface that is white to dirty white.
The upper half of the stipe is often covered with white
farinose squamules. The stipe lacks a basal bulb. At the
stipe base, the volva is 20 - 40 × 12 - 25 mm, saccate,
with an outer surface that is white to whitish and an
inner surface that is white to greyish. There is an
internal limb present on the inner surface of the volva.
Spores measure (8.0-) 9.0 - 11.0
(-12.0) × (6.5-) 7.0 - 9.0 (-9.5) µm and are broadly
ellipsoid to ellipsoid and inamyloid. Clamps are absent from the bases of basidia.
Originally described from
Indonesia, this species also is found in tropical China.—Zhu L. Yang
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BO (implicit, in liquid)
Z. L. Yang. 1997. Biblioth. Mycol. 170: 92, figs. 72-76.
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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
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The same field may also contain black text, which is data from a revision of the present
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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 derived from the protolog of the present taxon is based upon
cited research by ZLY and colleagues.
NOTE: Spore measurements from papers by Z. L. Yang use his "Times New Roman" face for "Q" and "Q'"—respectively, "Q" and "Q."
lamella edge tissue
from protolog: inflated cells 15 - 30 μm long, globose to subglobose.
from protolog: [-/-/-] 8 - 11 × 6 - 7 μm, (est. Q = 1.33 - 1.57; est. Q = 1.46), ellipsoid; apiculus sublateral (per figure); contents not described; color in deposit not recorded. "Most common dimensions 9 - 10 × 6 - 6.5 μm." [Note: Range of Q conservatively estimated in order to permit sporograph generation.—ed.]
from study of type, Yang (1997): [40/2/1] (8.0-) 8.5 - 10.0 (-10.5) × (6.0-) 6.5 - 7.5 (-8.0) μm, (Q = (1.19-) 1.25 - 1.42 (-1.47); Q = 1.32 ± 0.06).
Solitary or in small groups. China: At 600 - 1750 m elev. In conifer and broadleaf forests with Pinus kesiya var. langbianensis.
from protolog: INDONESIA: JAVA—Bogor, Botanical Garden, iii.1925 van Overeem s.n. (holotype, BO, implicit, in liquid).
from study of type, Yang (1997): INDONESIA: JAVA—Bogor, Botanical Garden, iii.1925 van Overeem s.n. (holotype, BO, implicit, in liquid).
YUNNAN—Pu'er Prefecture - Jingdong Yi Autonomous County, Bian, 21.viii.1991 Z. L. Yang 1601 (HKAS 24161); Jinggu Dai and Yi Autonomous Co., Mengban, 21.viii.1991 G. Song 256 (HKAS 24152); Simao District, unkn. loc., 1.viii.1991 P. G. Liu 791 (HKAS 24159).
Xishuangbanna Dai Autonomous Prefecture - Menghai Co., Mangao, 16.viii.1991 Z. L. Yang 1585 (HKAS 24160); Mengla Co., Menglun, 11.ix.1974 S. Y. Zeng s.n. (HKAS 1441), s.n. (HKAS 1458).
Yang (2000): CHINA:
JIANGSU—Nanjing (sub-provincial) city - former city of Nanjing, Dr. Sun Yat-sen Mausoleum Nat. Pk., 14.vii.1936 S. C. Li (formerly "IBN 5808"; BPI 751435, as "Amanita vaginata").
Yang et al. (2001):
HAINAN—Ledong Li Autonomous Co. - Jianfengling, 2.ix.1999 X. L. Wu 20 (HKAS 34110), 3.ix.1999 X. L. Wu 19 (HKAS 34109).
—R. E. Tulloss
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