(Zhu L. Yang) Yang-Yang Cui, Qing Cai & Zhu L. Yang
"Ochraceous Slender Caesar"
Amanita hemibapha var. ochracea Zhu L. Yang
1. Amanita hemibapha var. ochracea - Z. L. Yang (SW China)
2. Amanita hemibapha var. ochracea - Z. L. Yang (SW China)
3. Amanita hemibapha var. ochracea - Z. L. Yang (SW China)
The fruiting bodies of Amanita ochracea are large. The cap is 100 - 200 mm
wide, convex to plano-convex, distinctly umbonate, brown
over disc, becoming ochracous to yellow toward the
margin, usually glabrous. The cap margin is
tuberculate-striate (30% to 35% of the radius) and
non-appendiculate; the context is white.
Gills are free to nearly free, crowded, white, with yellow to yellowish brown edges; the
short gills are truncate.
The stem measures 150 - 250 × 15 -
30 mm, usually tapering upward, whitish to yellowish,
covered with yellowish brown to yellowish squamules; the
context is white, hollow; and the stem lacks a basal
bulb. On the stipe base, the volva is saccate, 40 - 80 x
30 - 50 mm and membranous. The outer surface is white to
dirty white; and the inner surface is whitish, with a
white to yellowish internal limb placed rather high on
the inside of volval limb. The annulus is membranous and yellowish.
The present species is edible and often found in markets.
The spores measure (8.0-) 9.0 - 12.5 (-17.0) × (6.0-) 7.0 - 9.0 (-10.0) µm and are
broadly ellipsoid to ellipsoid and inamyloid. Clamps are common on the bases of basidia.
Amanita ochracea was originally described from Yunnan Province, China. This species is common in the subalpine to alpine regions of southwestern China.—Zhu L. Yang
(Zhu L. Yang) Yang-Yang Cui, Qing Cai & Zhu L. Yang in
Yang-Yang Cui et al. 2018. Fungal Diversity
91(1): 56, figs. 3(i), 10.
≡Amanita hemibapha var. ochraceae
Zhu L. Yang.
Biblioth. Mycol. 170: 67, figs. 50-52.
S. Sanchez et al., (direct deposit), Roy. Ontario Mus., Toronto
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 description is derived from the protolog of the present species.
NOTE: Spore measurements from papers by Z. L. Yang use his "Times New Roman" face for "Q"
and "Q'"—respectively, "Q" and
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.