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Amanita ceciliae

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

by Michael Kuo

The "real" Amanita ceciliae is a European species; in eastern North America we have what appears to be a large group of potentially separate species currently going under the European name. Defining features for the group include the lined, brown cap; the absence of a ring on the stem; and the grayish universal veil, which leaves patches or warts on the surface of the cap but breaks up into fragments around the base of the stem rather than forming a sack-like volva. Under the microscope, these species feature round, inamyloid spores.

Description:

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

Cap: 5-12 cm; convex, expanding to planoconvex or flat; brown; often darker in the center; adorned with grayish patches; bald beneath the patches; tacky when young, but soon dry; the margin strongly lined for 1-2 cm at maturity.

Gills: Free from the stem or slightly attached to it; crowded; whitish; with frequent short-gills.

Stem: 7-18 cm long; up to 2 cm thick; tapering slightly to apex; whitish to brownish; bald or finely hairy with brown fibrils; without a ring; without a swollen base; with a whitish to grayish volva that falls apart, leaving flakes, patches, or a grayish zone of tissue on the stem base.

Flesh: White; unchanging when sliced.

Odor: Not distinctive.

Spore Print: White.

Chemical Reactions: KOH on cap surface negative.

Microscopic Features: Spores 8-12 µ; globose or subglobose; smooth; inamyloid. Basidia 4-sterigmate; without basal clamps. Pileipellis an ixocutis of hyphae 2-7 µ wide. Lamellar trama bilateral; subhymenium ramose.

Amanita inaurata and Amanita strangulata are synonyms for Amanita ceciliae.

REFERENCES: (Berkeley & Broome, 1854) Bas, 1984. (Saccardo, 1887; Smith, Smith & Weber, 1979; Weber & Smith, 1985; Jenkins, 1986; States, 1990; Phillips, 1991/2005; Lincoff, 1992; Metzler & Metzler, 1992; Barron, 1999; Roody, 2003; McNeil, 2006; Miller & Miller, 2006.) Herb. Kuo 09110512, 06031006, 06071303.

Amanita expert Rod Tulloss has provided preliminary documentation for a number of putative morphological species in the North American ceciliae group; see the Section Vaginatae portion of his key to northeastern Amanita species (2005), as well as his provisionally named "Amanita borealisorora."

Further Online Information:

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

 

Amanita ceciliae

Amanita ceciliae

Amanita ceciliae

Amanita ceciliae
Spores



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Cite this page as:

Kuo, M. (2013, March). Amanita ceciliae. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/amanita_ceciliae.html