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Amanita umbrinodisca
(Murrill) Murrill
"Dark-Eyed Panther"
Technical description (t.b.d.) BRIEF DESCRIPTION: Based on the original description of Murrill (1912) and type study by David T. Jenkins (1979). The cap of A. umbrinodisca is up to 100 mm wide, very thin, convex to plano-convex, umbonate, in age the umbo sits in a depression, yellow colored umbo turning umbrinous in age, honey-like color fading to straw-color on the conspicuously long striate margin. The volval remnants are large, irregular, white patches. The gills are free, not crowded, broad and white. The stem is up to 120 x 10 - 20 mm, narrowing upward, hollow, white or slightly yellowish. The ring is ample, white, persistent, attached above the center of the stem. The volva is white, tough, short, and ocreate. The bulb on the base of the stem is 30 mm wide. The spores measure 7.0 - 8 (8.6) × 10.2 - 11.7 µm and are ellipsoid and inamyloid. Clamps are absent at bases of basidia. Originally described from the state of Washington, USA, from fir forests. The inamyloid spores and striate pileus margin definitively
contradict Murrill's belief that this species belongs in Amanita
sect. Phalloideae. Jenkins (1986)
placed the species in what I would now call stirps Caesarea
however examination of the type shows that there is a distinct bulb and
that the species belongs in section Amanita. The absence of
clamps suggests the possibility of a relationship to Amanita pantherina
(DC.:Fr.) Krombh. although the thin cap
flesh suggests the relationship is not that close. Return to Section Amanita page. Last changed 28 July 2005. |