Technical description (t.b.d.)

BRIEF DESCRIPTION: The cap of A. virginea is 100 - 155 mm wide, convex, then plane or slightly concave, dry, white, smooth, glabrous, with a appendiculate margin. The cap is covered with a thin, soft, mealy, white layer, and set with hard, conical, white, separable warts.

The gills are free, rather crowded, broad, and white.

The stem is 60 - 100 x 20 - 50 mm, more or less annulate, white, mealy, with small, transverse scales up to the apex. The volva is present as more less conical warts.

The spores measure 7.0 - 9.0 x 6.0 -7.5 µm and are amyloid and broadly ellipsoid. Clamps are numerous at bases of basidia.

Amanita virginea was originally described from Singapore. Amanita sumatrensis (a synonym) was originally described from Indonesia (Java and Sumatra).

Bas (1969) placed A. virginea in his stirps Virginea as its sole member. He states that he isolated the present species from his stirps Chlorinosma (see A. chlorinosma (Peck) Lloyd) because of the much more coherent volva of A. virginea. The volva is coherent despite the fact that the tissue is almost entirely composed of inflated cells. For some reason these cells stick together in the present species. -- R. E. Tulloss

Drawing: Dr. C. Bas (1969) (reproduced by courtesy of Persoonia, Leiden, the Netherlands)

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Last changed 23 August 2004.
This page is maintained by R. E. Tulloss.
Copyright 2004 by Rodham E. Tulloss.
Drawing copyright 1969 by Persoonia.