Technical description (t.b.d.)

BRIEF DESCRIPTION: The cap of Amanita umbrinolutea var. flaccida is about 105 mm wide, smooth, convex to planar to plano-concave in age, flaccid, fragile, with a conspicuously sulcate margin (50% of the radius). The cap is pale gray-brown and darker over the center. The flesh is thin. The volva is absent.

The gills are white, with the edge minutely punctate with dark brown. The short gills are of diverse lengths, with the shortest truncate and longest subattenuate, unevenly distributed, and apparently rather sparse.

The stem is about 83 x 7- 10 mm, narrowing upward, pale golden brown, gracile, delicate, fragile, and exannulate. The saccate volva is widely spreading, red-brown on the outer surface, gray on the inner surface, and white with rusty stains and spots on the stem base in dried specimens.

The spores measure (9.4-) 9.8 - 12.0 (-13.4) x (8.3-) 9.1 - 11.2 (-12.6) µm, and are subglobose to broadly ellipsoid (occasionally globose), and inamyloid. Clamps are rare or absent at the bases of basidia.

Amanita umbrinolutea var. flaccida was originally described from England (West Sussex). Nearby trees were recorded to included Birch, Hawthorn, and Spruce.

From photographs sent to me by M. Francis Massart, it seems that var. flaccida may occur on the continent as well as in the U. K. -- R. E. Tulloss

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Last changed 1 July 2004.
This page is maintained by R. E. Tulloss.
Copyright 2004 by Rodham E. Tulloss.