The following is largely based on the original
description (Wood 1997).
The cap of Amanita
albidannulata is up to 90 mm wide, convex then plane, smooth to finely
fibrillose, dry, dull cream to cream-buff to pale
buff-brown, with a nonstriate and slightly appendiculate margin. Volval remains are
present as large, flat, membranous, irregular warts, sometimes
thickened, white to dull buff.
The gills are free, crowded, thin, white to pale
cream, with a concolorous margin. The short gills are present in at least two series.
The stem is up to 100 × 15 mm, white to pale
cream, smooth to finely fibrillose throughout, gradually swelling to an
ellipsoid bulb at the base. The ring is prominent, skirt-like, persistent, membranous, rarely fragile,
white to pale cream, and not striate above. The basal base is white, smooth, with no
evidence of volva, but having scattered fibrillose zones on the lower stem above the bulb.
The spores measure (7.2-) 8.1 - 9.6 (-10.2) × (5.7-) 6.3 - 7.8 (-8.4) µm and are
broadly ellipsoid to ellipsoid and amyloid. Clamps are absent at bases of basidia.
Wood describes the mushroom as occurring in sclerophyll forests and under Allocasuarina littoralis 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).
Wood places this species in Bas' stirps Straminea; however, he does not provide the information necessary to verify this. His description of the microscopic characters of the volva suggest that uninflated hyphae are not plentiful, which condition would be required in order to fit the definition of stirps Straminea. Since Bas' systematics of section Lepidella are so strongly dependent upon the structure of the volva, we reserve judgment on the placement of this species at the level of stirps.—R. E. Tulloss and L. Possiel
A. E. Wood. 1997. Austral. Syst. Bot. 10: 768, fig. 23(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 not directly from the protolog of the present taxon and not cited as the work of another researcher is based on original research by R. E. Tulloss.
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.