Amanita perphaea - Amanitaceae.org - Taxonomy and Morphology of Amanita and Limacella
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name Amanita perphaea
name status nomen acceptum
author C. Simmons, T. Henkel & Bas
english name "False Sporeless Amanita"
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  • Amanita perphaea, Pakaraima Mtns., Guyana.Amanita perphaea, Pakaraima Mtns., Guyana.

    1. Amanita perphaea, Pakaraima Mtns., Guyana.

    • intro The information below is drawn form the species' protolog.
    cap

    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.

    gills

    The gills are free, slightly crowded, slightly thickened, and white to cream.  The short gills are truncate to subtruncate.

    stem

    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.

    spores

    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.

    discussion

    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

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