The following is based on the original description
by Wood (1997).
The cap of A. pallidobrunnea is up
to 70 mm wide, cream-gray to pallid brown to gray-brown,
darker in the center, convex then plane, sometimes becoming depressed in
the center, smooth, dry, with a striate margin (about 1/3 of the radius according to text; 1/6
of radius according to illustration). Volval remains are absent.
The gills are free, thin, crowded, white to
rather pale cream, with a minutely roughened and white edge. The short gills are
present in at least one series.
The stem is up to 90 × 10 mm, cylindric,
white, undecorated or finely granular over the entire length. No ring is
present. The saccate
volva is widely flaring, white or (rarely) off-white.
The spores measure (8.6-) 10.0 - 12.5 × (7.1-)
7.7 - 9.6 (-11.1) µm and are broadly ellipsoid to ellipsoid and inamyloid. Clamps are
absent at bases of basidia.
Wood describes the mushroom as occurring in tall
open forests and 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
Wood's observation that the subhymenium of this
species is noncellular (i.e., not comprising inflated cells suggestive of
plant tissues) will probably be important in its classification. For the
moment readers may wish to compare the present species to Amanita
mairei Foley of Europe and taxa related to it. Unfortunately the cap skin of A.
pallidobrunnea remains undescribed. A more complete description of the
volva and cap skin will assist in the future placement of the present
species (see, for example, A. dunicola Guzmán).
—R. E. Tulloss and L. Possiel
A. E. Wood. 1997.
Austral. Syst. Bot. 10: 744, fig. 10(a-e).
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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.