BRIEF DESCRIPTION: 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 x 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 x 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

Photo: T. Henkel (by permission of Persoonia, Leiden, the Netherlands) (Simmons et al., (2002))

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Last changed 20 October 2009.
This page is maintained by R. E. Tulloss.
Copyright 2004, 2009 by Rodham E. Tulloss.
Photos copyright 2001 by Persoonia.