Technical description (t.b.d.)

BRIEF DESCRIPTION: The following is largely derived from the description of Jenkins (1986).

The cap of A. altifissura is 40 mm wide, plano-convex, white, dry, deeply rimose-areolate, slightly appendiculate, with a nonstriate, incurved margin. The volva is present as irregularly shaped, dark brown, thin crusts or patches on top of each areola, relatively firmly attached.

The gills are not crowded, adnexed, white to pale cream, and narrow. The short gills are numerous, concavely to convexly truncate to subattenuate.

The stem is 20 x 8 - 11 mm, tapering upward, slightly expanded at the apex, solid, white, exannulate, without volval remnants. A turnip-shaped bulb is present at the base of the stem.

The spores measure (9.4-) 10.2 - 11.7 (12.5) x (5.0) 5.5 - 6.2 µm and are amyloid and elongate to short cylindric. Clamps are present at bases of basidia.

Amanita altifissura is known from mixed forests in the southeastern U.S.

Jenkins originally described the present species from Alabama, U.S.A. and later reported it from North Carolina.

Placement of the present species with regard to the stirpes of Bas is unresolved.
-- R. E. Tulloss

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Last changed 20 November 2004.
This page is maintained by R. E. Tulloss.
Copyright 2004 by Rodham E. Tulloss.