following is largely based on the original description (Wood 1997).
The cap of Amanita pallidochracea is up
to 40 mm wide,
pale biscuit color, convex then plano-convex, smooth, dry, faintly virgate, with
a reportedly nonstriate and nonappendiculate margin. Volval remains are
absent or limited to one irregular, flat, off- white, membranous patch.
The gills are free, crowded, thin, white to
slightly off- white, with a concolorous and finely serrate edge. Short gills are
The stem is up to 50 × 7 mm, cylindric to
slightly narrowing upward, white above, deep cream below, with irregular fine bundles of
fibers covering it. No ring is present. The base is slightly enlarged
[?}, with a
large, white, membranous, saccate volva.
The spores measure (8.3-) 9.7 - 10.8 × 5.1 - 6.6 µm and are
elongate and inamyloid.
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).
So far as we know this species is known only from the type collection.
Wood describes the spores of the present species
as having an average length to width ratio slightly in excess of 1.8.
For section Vaginatae, these are extremely narrow spores. In a
discussion of spore shape variation in the world, Tulloss (2005)
noted the very few species in section Vaginatae having spores this narrow and the fact that
they are limited (as far as is known) to three widely separated areas on
the planet: Nigeria (one species with a weak ring), Florida (two
species, one with a ring, one without), and New South Wales (one species
lacking ring). There is no reason to believe that these four taxa are
closely related either phenetically or phylogenetically.
The confusion surrounding the occasionally
utilized section Ovigerae Singer (a synonym of section Vaginatae)
is provided with another example in Wood's treatment of it. He places an
annulate member of the Vaginatae, an exannulate member of the Vaginatae
(the present species), and an exannulate member of section Amanita
all in section Ovigerae.—R. E. Tulloss and L. Possiel
A. E. Wood. 1997.
Austral. Syst. Bot. 10: 761, fig. 20(a-e).
Due to delays in data processing at GenBank, some accession numbers may lead to unreleased (pending) pages.
These pages will eventually be made live, so try again later.
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.