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Amanita ameghinoi (Speg.) Singer
"Ameghino's Lepidella"

Technical description (t.b.d.)

BRIEF DESCRIPTION: The cap of A. ameghinoi is 50 - 100 mm wide, convex to flat, fleshy, white to pale pinkish orange, probably dry and fibrillose, with an inflexed, nonsulcate, appendiculate margin. The cap is densely covered with small to large, whitish, later dingy brown scales.

The gills are rather crowded, adnexed to free, rather broad, and white to pallid.

The stem is 50 - 90 x 10 - 15 mm, subcylindrical, stuffed, white to pallid orange; below the ring is more or less coarsely scaly.

The spores measure (10.0-) 10.2 - 12.8 (-14.8) x (7.8-) 8.0 - 10 (-12.0) µm and are amyloid and broadly ellipsoid to ellipsoid. Clamps are abundant at bases of basidia.

This species occurs without woody plant symbionts. It is known only from the pampas region of Argentina.

For similar taxa, see the taxa of Bas' stirps Vittadinii. It is particularly similar to A subcaligata (A. H. Sm. & P. M. Rea) A. H. Sm. ex Tulloss of the western USA.
-- R. E. Tulloss

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

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Last changed 22 February 2009.
This page is maintained by R. E. Tulloss.
Copyright 2004, 2008, 2009 by Rodham E. Tulloss.
Drawing copyright 1969 by Persoonia.