The following is largely based on the original description (Wood 1997).
The cap of Amanita fuscobrunnea is up to 35 mm wide, convex, smooth, dry, gray, with a
nonstriate margin. The volva is present as prominent, dark brown pyramidal warts, smaller towards the margin, and may be reduced at
the margin to flat scales.
The gills are free, thin, crowded, white, and marginate with a thin pale brown edge. The short gills
are present in at least one series.
The stem is up to 50 × 6 mm, narrowing upward, white, covered with dark brown, powdery granules all over, and
marked with distinct concentric dark zones on its lower part and on the top of the bulb. The ring is
membranous, broadly flaring, dull gray-brown, with a dark brown margin. The bulb is small and ellipsoid.
The spores measure (5.7-) 6.6 - 7.5 × 5.4 - 6.6 µm
and are subglobose to broadly ellipsoid and amyloid. Clamps are absent at bases of basidia.
Wood describes the mushroom as occurring in sclerophyll forests from the state of New South Wales, Australia. A
sclerophyll forest in the Australian bush is a forest of hard-leaved
plants including Eucalyptus in the overstory (wikipedia).
This species is known only from the type collection.
The reader may wish to compare the present species with A. innatifibrilla
Zhu L. Yang nom. prov. and the forms of A.
pilosella Corner & Bas. The latter and other species described by Corner & Bas share the characteristic
of dark volval material on much of
the stem and relatively small spore size. We selected the two species listed above as closest matches to A. fuscobrunnea because of
spore size, spore shape, habit, and pigmentation. It is interesting that
many of the small species of section Validae with dark volva are to be found in eastern and southeastern Asia and the Indian
subcontinent, the islands of Oceania, Australia, and sub-Saharan Africa. It would be very interesting to see an investigation of a
possible Gondwanan origin for this group within section Validae.
—R. E. Tulloss and L. Possiel
A. E. Wood. 1997.
Austral. Syst. Bot. 10: 820, fig. 51(a-e).
Due to delays in data processing at GenBank, some accession numbers may lead to dead pages.
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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 is based entirely on the protolog of this species, which does not meet contemporary standards for Amanita taxonomy.
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.