This text is derived from the original
description of Amanita olivaceofusca.
The fruiting bodies of Amanita olivaceofusca are small.
cap
The cap is 20 – 45 mm wide,
plano-convex to planar,
dark brown to gray-brown in the
center, gradually changing towards
the margin to yellow-brown to brown.
The cap’s margin is radially grooved for 20%
to 50% of the cap's radius. There is not material
hanging from the edge. The flesh is white.
gills
The gills are free, crowded, and white.
The short gills are truncate and plentiful.
stem
The stem is 60 – 140 × 3 – 6 mm,
nearly cylindrical or narrowing upwards,
white to dirty white, covered with minute,
concolorous fibrils or floccules. The stem
lacks a basal bulb. At the stem's base,
the volva is saccate, 15 – 25 × 8 – 15 mm,
membranous, both surfaces are white.
odor/taste
The odor and taste of the present species were not recorded.
spores
The spores measure 10.5 – 13.0 × 8.5 – 10.0 µm and
are broadly ellipsoid to ellipsoid and
inamyloid. There are no clamps at the
bases of basidia.
discussion
Amanita olivaceofusca is described from
Yunnan Province, China. It is associated
with broad-leaved trees in tropical to
subtropical forests.
Morphologically,
Amanita angustilamellata (Höhn.) Boedijn
can be easily confused with A. olivaceofusca
because of its slender fruiting body
and tropical to subtropical distribution,
but A. angustilamellata has a relatively
larger fruiting body, a darker colored cap
and globose to subglobose spores
(Q = 1.0 - 1.05 (-1.13).—Yang-Yang Cui and
Rachel Warner
brief editors
RET
name
Amanita olivaceofusca
author
Yang-Yang Cui, Qing Cai, Zhu L. Yang in Cui et al.
(2018)
Fungal Diversity 91(1): 70. figs. 22a-b, 23.
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where data is missing or uncertain.
The following material is derived directly from the
protolog of the present taxon and associated documen-
tation such as sequences deposited in GenBank.
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name
Amanita olivaceofusca
name status
nomen acceptum
author
Yang-Yang Cui, Qing Cai & Zhu L. Yang
name
Amanita olivaceofusca
name
Amanita olivaceofusca
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