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Amanita fulva

[ Basidiomycetes > Agaricales > Amanitaceae > Amanita . . . ]

by Michael Kuo

This beautiful mushroom is part of the Amanita vaginata species group, which contains amanitas with sacklike volvas, lined cap margins, and ring-less stems. Amanita fulva is a classic European species from the vaginata group, featuring a tawny brown cap and a reddish-brown-staining volva; we have several potential species in North America that match its general description but are probably genetically distinct. These North American fulva-like entities are, for the time being at least, unnamed--although Amanita expert Rod Tulloss has unofficially proposed "Amanita amerifulva" for the most widely distributed and common of these.

Description:

Ecology: Mycorrhizal with hardwoods or conifers; growing alone, scattered, or gregariously; summer and fall; widely distributed east of the Rocky Mountains.

Cap: 4-10 cm; oval to convex, becoming broadly convex or nearly flat; sticky at first or when wet; tawny brown to brown; sometimes with a few scattered white to tawny patches; bald; the margin prominently lined or grooved.

Gills: Free from the stem or slightly attached to it; whitish; close or nearly crowded; short-gills infrequent.

Stem: 7-16 cm long; 0.5-1.5 cm thick; slightly tapered to apex; bald or slightly hairy; whitish to pale brownish; without a ring; the base enclosed in a sacklike, white volva that fits loosely around the stem and often discolors tawny brown.

Flesh: White throughout; soft; unchanging when sliced.

Odor: Not distinctive.

Chemical Reactions:KOH negative on cap surface.

Spore Print: White.

Microscopic Features: Spores 9-11 µ; smooth; globose or subglobose; inamyloid. Basidia without clamps; 4-spored. Pileipellis an ixocutis of hyphae 2-6 µ wide. Lamellar trama bilateral; subhymenium ramose.

REFERENCES: Fries, 1815. (Saccardo, 1887; Smith, Smith & Weber, 1979; Arora, 1986; Jenkins, 1986; Phillips, 1991/2005; Lincoff, 1992; Metzler & Metzler, 1992; Horn, Kay & Abel, 1993; Barron, 1999; McNeil, 2006; Tulloss, 2013.) Herb. Kuo 10010419, 05280706, 09091204.

Further Online Information:

Amanita fulva at Roger's Mushrooms

 

Amanita fulva

Amanita fulva

Amanita fulva

Amanita fulva

Amanita fulva

Amanita fulva
Spores



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Cite this page as:

Kuo, M. (2013, April). Amanita fulva. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/amanita_fulva.html