Technical description (t.b.d.)

BRIEF DESCRIPTION: The cap of Amanita armillariiformis is 40 - 105 (-160) mm wide, robust, convex to plane at maturity, glabrous, dry to very slightly viscid when wet, dull white to dull pinkish-buff, with an appendiculate, smooth, nonstriate margin. The volval remnants most often appear to be absent, but when present, are thin, floccose patches or crusts with a pale salmon tint.

The gills are very narrowly adnate or joined to the stem by a line, subdistant, white at first, then cream to pale tan at maturity, with slightly flocculose edges. The short gills are abundant, attenuate, and present in at least two tiers.

The stem is (35-) 50 - 90 × 17 - 24 mm, equal or expanding slightly toward base, nearly glabrous above the ring, with fine tufts of white fibrils or scales below, solid or slightly stuffed, white. The ring is thin, membranous, white, superior to median, easily torn, frequently adhering to the stem or the cap margin or disappearing. The volval remnants on the basal bulb and lower stem are concentric rings or random chunks or patches with a pale salmon tint. 

The odor is "unpleasant, sometimes strong and medicinal" (from protologue).

Spores measure (8.8-) 10.2 - 15.0 (-17.0) × (6.0-) 6.6 - 8.9 (-11.3) µm and are broadly ellipsoid to ellipsoid to elongate and amyloid. Clamps are rather common at bases of basidia.

The species is found in grassy areas distant from trees, such as in public parks.

It is known from Prov. Alberta, Canada, to Colorado, U.S.A.  -- R. E. Tulloss

Photo: R. E. Tulloss (Colorado)

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Last change 22 August 2006.
This page is maintained by R. E. Tulloss.
Copyright 2003, 2004, 2005, 2006 by Rodham E. Tulloss.
Photograph copyright 2003 by Rodham E. Tulloss.