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Amanita multisquamosa

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

by Michael Kuo

This beautiful eastern North American mushroom is one of several species in the Amanita pantherina species group, and while I am not a fan of giving "common names" to mushroom species, I admit that "white panther" would make for a pretty cool label. The species has a whitish cap, with a yellowish or tan center and numerous whitish warts. It has a thick ring, and a characteristic bulb at the base of the stem: the top of the bulb features a collarlike, folded-over rim of volval material.

A Rocky Mountain species is very similar and often gets labeled "Amanita multisquamosa," but I believe it is a distinct species; see Amanita species 03 for more information.

Description:

Ecology: Mycorrhizal with oaks and other hardwoods; growing alone, scattered, or gregariously; summer and fall; widely distributed east of the Great Plains.

Cap: 3.5-10 cm; convex, becoming broadly convex or flat in age; tacky when fresh; pale whitish, with a yellowish tan center (or whitish overall); adorned with numerous whitish to yellowish warts; bald; the margin finely lined at maturity.

Gills: Free from the stem or nearly so; close or crowded; white; with frequent short-gills.

Stem: 8-13 cm long; 0.5-1.5 cm thick; more or less equal, or tapering to apex; with a high, skirtlike, whitish ring; bald above the ring but slightly shaggy below it; whitish; terminating in a basal bulb that typically has a pinched-off bottom and features an adherent white volva that folds over to form a collarlike rim on the upper edge of the bulb (occasionally also featuring a few loosely clinging concentric rings of volval material).

Flesh: White throughout; thin; hollowing in the stem; not changing when sliced.

Odor: Not distinctive.

Chemical Reactions: KOH negative to slightly pinkish on cap surface.

Spore Print: White.

Microscopic Features: Spores 8-12 x 5-8 µ; ellipsoid; inamyloid; smooth. Basidia 4-spored; unclamped. Pileipellis an ixocutis of hyphae 2-9 µ wide. Lamellar trama bilateral; subhymenium ramose.

REFERENCES: Peck, 1900. (Atkinson, 1900; Kauffman, 1918; Smith, Smith & Weber, 1979; Jenkins, 1986; Phillips, 1991/2005; Lincoff, 1992; Bessette, Miller, Bessette & Miller, 1995; Tulloss, 2013.) Herb. Kuo 06119501, 06129520, 06160201, 07230302, 07230305, 07070705.

Amanita cothurnata and Amanita pantherina var. multisquamosa are synonyms.

Further Online Information:

Amanita multisquamosa at Studies in the Amanitaceae
Amanita pantherina var. multisquamosa at Roger's Mushrooms

 

Amanita multisquamosa

Amanita multisquamosa

Amanita multisquamosa

Amanita multisquamosa

Amanita multisquamosa
Spores



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