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Amanita porphyria

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

by Michael Kuo

This northern conifer lover is distinguished by its bulbous, rimmed or collared stem base, its brown cap, and its grayish universal veil remnants and ring. The stem often has grayish fibrils, sometimes in vague zones, below the ring. Amanita porphyria bears a resemblance to Amanita brunnescens, but that species has whitish veils, and a stem that bruises reddish brown, terminating in a bulb that is "chiseled" or split vertically (though Amanita porphyria sometimes displays a cleft bulb, as well).

Amanita porphyria is a European species first named in the early 19th century; our North American versions of the species may be phylogenetically distinct.


Ecology: Mycorrhizal with conifers, especially spruces and hemlocks; growing alone, scattered, or gregariously; summer and fall; northern North America from Maine to the Pacific Northwest.

Cap: 3-12 cm; convex, becoming broadly convex, often with a central bump; sticky at first or when wet; bald; appearing streaked radially; the margin not prominently lined; grayish brown to brown or purplish brown; often with scattered gray to purplish gray warts or patches.

Gills: Free from the stem or attached to it; white, sometimes grayish or bruising grayish in age; close; short-gills present.

Stem: 5-12 cm long; 1-1.5 cm thick; more or less equal above; terminating in a basal bulb that is rimmed or collared (and sometimes "cleft," causing confusion with Amanita brunnescens); with a grayish ring and gray fibrils below the ring, often arranged in chevrons or zones; bald above the ring; the grayish volva sometimes leaving fragments on the lower stem.

Flesh: White throughout.

Odor: Sometimes turniplike in age.

Spore Print: White.

Microscopic Features: Spores 7-10 µ; globose; smooth; amyloid. Basidia 4-spored; unclamped. Pileipellis an ixocutis of hyphae 2-8 µ wide. Lamellar trama bilateral; subhymenium subcellular.

REFERENCES: Albertini & Schweinitz, 1805. (Fries, 1821; Saccardo, 1887; Kauffman, 1918; Smith, Smith & Weber, 1979; Thiers, 1982; Arora, 1986; Jenkins, 1986; Phillips, 1991/2005; Lincoff, 1992; Barron, 1999; Roody, 2003; McNeil, 2006; Miller & Miller, 2006; Trudell & Ammirati, 2009.) Herb NY 46320 (HEB 16683).

Further Online Information:

Amanita porphyria at Studies in the Amanitaceae
Amanita porphyria at Roger's Mushrooms


Amanita porphyria

Amanita porphyria

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Kuo, M. (2013, May). Amanita porphyria. Retrieved from the MushroomExpert.Com Web site: