|Major Groups > Gilled Mushrooms > Pale-Spored > Amanita > Amanita ceciliae|
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.
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:
Cite this page as:
Kuo, M. (2013, March). Amanita ceciliae. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/amanita_ceciliae.html