This text is derived from the original description of
The fruiting bodies of Amanita flavopantherina
are medium-sized to large.
The cap of the present species is 50 – 130 mm wide,
plano-convex to planar, yellow-brown, brown to
dark brown, often darker at center.
The volva is present as pyramidal or cone-like warts
that are bumpy and yellowish.
The cap’s margin bears short grooves that
occupy less than 10% of the cap's radius. The cap
margin has no material hanging from the edge.
The flesh is white to yellowish. [Note;
Illustration in the protolog
indicates the color of the warts fades to whitish on
The gills are free, crowded, and white.
The short gills are truncate and plentiful.
The stem is 80 – 230 × 10 – 35 mm,
subcylindric to narrowing upwards;
its surface is white to yellowish,
often covered with
floccose scales of the same color.
The stem's basal bulb
is 15 – 35 mm wide, subglobose to spindle-shaped.
The volva is present as floccose, white to
yellowish remnants, or forms a short "rolled sock"
at the top of the bulb. The ring hangs from
a region 15 – 40 mm below the stem's top and is
white to yellowish with a yellow to brown edge.
The odor and taste of this species were not recorded.
The spores measure 10.0 – 12.0 × 8.0 – 10.0 µm
and are broadly ellipsoid to ellipsoid
Clamps are common at bases of basidia.
Amanita flavopantherina occurs in
subalpine forests dominated by Fir (Abies)
and Spruce (Picea),
and fruits from summer to autumn in southwestern
Amanita flavopantherina can be confused with
(DC.) Krombh. and A. pakistanica
Tulloss et al. However, A. pantherina has
narrower spores [Q = (1.20–) 1.27–1.60 (–2.04)] and
no clamps. Amanita pakistanica
has an umbonate cap covered with patchy or flaky,
white, easily lost volval remnants, and relatively
narrower spores [Q = (1.16-) 1.25 -
1.69 (-1.97)].—Yang-Yang Cui and Rachel Warner.
ZLY & RET
Yang-Yang Cui, Qing Cai & Zhu L. Yang. (2018).
Fungal Diversity 91(1): 25, figs. 3(a-b), 4.