Amanita crenulata : Poison Champagne Amanita



Technical description not yet available.


Amanita crenulata is a very common species of the northeastern U.S.A., occurring most frequently in the Autumn, often in groups with Amanita muscaria var. guessowii Veselý.

Its cap is very pale to pale tan with varying degrees of yellow and/or gray tones. The volva is distributed over the 22 – 90 mm wide cap as powdery, somewhat paler warts. (Their color has been called “champagne.”) The cap’s marginal striations take up only 10 – 20% of the cap radius.

The gills are narrowly adnate, close to subcrowded, and white to cream. The short gills are truncate to subtruncate or (occasionally) subattenuate.

The stipe is 17 – 100 x 3.5 – 16 mm and has a skirt-like annulus that is often quickly lost or left in torn fragments on the pileus margin. The notable bulb usually bears a distinct ring of champagne volval powder on its “shoulder.”

The spores measure (5.9-) 7.3 – 10.2 (-14.2) x (4.8 -) 6.2 – 8.8 (-14.2) µm and are subglobose to broadly ellipsoid to ellipsoid (infrequently globose or elongate) and inamyloid. Clamps are absent from the bases of basidia.

The species is associated primarily with oaks and diverse conifers.

The species is toxic and produces dramatic symptoms similar to those of A. muscaria (L.:Fr.) Pers. and A. pantherina (DC.:Fr.) Krombh. — R. E. Tulloss

Photos: R. E. Tulloss (New Jersey)

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