This text is derived from the
original description of Amanita rubroflava.
The fruiting bodies of Amanita rubroflava are
medium-sized to large.
The cap is 70 – 120 mm wide,
convex to planar, raised over the stem (umbonate),
red to orange-red in the center,
gradually changing towards the margin
to yellow or yellowish. The cap’s margin
is radially grooved for about 20% to 40%
of the cap's radius and lacks material
hanging from its edge.
The flesh is
white, yellowish to brown.
The gills are free, crowded, and
yellow. The short gills are truncate and plentiful.
The stem is 150 – 220 × 7 – 30 mm,
nearly cylindric or narrowing upwards;
its surface is yellow and covered with
yellow fibers in a snakeskin pattern. The
stem lacks a basal bulb. The volva is saccate,
50 – 70 × 30–50 mm,and membranous and has
white to dirty white inner and outer surfaces.
The ring is yellow to yellowish and
is on the top part of stem.
The odor and taste were not recorded for the present species.
The spores measure 8.0 – 10.0 × 6.5 – 8.5 µm
and are subglobose to broadly ellipsoid
and inamyloid. Clamps are common at
bases of basidia.
Amanita rubroflava corresponds to
Amanita sp. 4 in
This species is known to occur only in
In China, A. rubroflava can
be confused with
(Berk. & Broome) Sacc.
However, A. hemibapha differs from
A. rubroflava by its infrequently umbonate cap,
narrower spores (Q = (1.36-) 1.43 - 1.67 (-1.68))
and its tropical distribution.—Yang-Yang Cui
and Rachel Warner
Yang-Yang Cui, Qing Cai & Zhu L. Yang.
Fungal Diversity 91(1): 61,
figs. 3(k-l), 12.
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
HKAS 38416 (ITS = AY436460),
which was identified as A. hemibapha in
Zhang et al. (2004)
and Yang (2005),
should be a member of A. rubroflava.
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Yang-Yang Cui, Qing Cai & Zhu L. Yang
"Yunnan Red and Yellow slender Caesar"
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