The information below is drawn form the species' protolog.
The cap of A. perphaea is up to 150 mm wide,
plano-convex with a depressed center, gray, shiny, darkening towards center, with a sulcate-striate margin.
The volva is present as gray, conical warts over the entire cap, more concentrated at the central region.
The gills are free, slightly crowded, slightly thickened, and white to cream.
The short gills are truncate to subtruncate.
The stem is 60 - 150 × 10 - 20 mm, central, tapering upwards, fibrillose, gray, and
darkening with age. Volval remnants form gray ridge-like
fragments at the base of the stem on the upper part of the stem's basal bulb.
The spores measure (5.6-) 6.1 - 7.4 × 4.9 - 6.9 µm and are amyloid and globose to
subglobose. Clamps are absent at bases of basidia.
Amanita perphaea is known only from the Pakaraima Mountains of western Guyana.
These localities include riverine swamp forest and adjacent slope forest dominated by Palywayek (Dicymbe
corymbosa) and other mixed hardwoods such as Caryocar sp. in wet bottomlands.—R. E. Tulloss
C. Simmons, T. Henkel & Bas. 2002. Persoonia 17(4): 571, fig. 3(a-e), pl. 5.
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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 derived from the protolog of the present species.
from protolog: [4/5/2] (5.6-) 6.1 - 7.4 × 4.9 - 6.9 μm, (Q = 1.0 - 1.10 (-1.30); Q = 1.05 - 1.08), with slightly thickened wall, amyloid, globose to subglobose, rarely broadly ellipsoid; apiculus prominent; contents not recorded; color in deposit not recorded.
In "riverine and adjacent slope forest dominated by Dicymbe corymbosa (Paluwayek) with scattered hardwoods including Caryocar sp. in wet bottomlands, on sandy soils with thick root mat and organic accumulations. ...."
from protolog: GUYANA: POTARO-SIPARUNI—Pakaraima Mtns., Upper Ireng watershed - ca. E bank of Sukabi R., ca. mouth of Kukuinang Crk., 1.5 km along S bank of Kukuinang Crk. 16.ii.1997 T. Henkel et al. TH6255 (paratype, BRG; paratype, L); 0.2-1 km downstream from Kurutuik Falls, slopes adjacent to W side of river, 15.ii.1997 T. Henkel et al. TH6229 (holotype, BRG; isotype, L).
"Amanita perphaea is commonly eaten by Patamona Indians and is called "Pulutukwe."
—R. E. Tulloss
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C. Simmons, T. Henkel & Bas
"False Sporeless Amanita"
1. Amanita perphaea, Pakaraima Mtns., Guyana.
T. Henkel - (1) Pakaraima Mountains, Guyana, by permission of Persoonia, Leiden, the Netherlands) (Simmons et al., (2002)
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.