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Amanita lanei [ Basidiomycetes > Agaricales > Amanitaceae > Amanita . . . ] by Michael Kuo Regular visitors to this Web site know that I rarely make a page for a mushroom I have not collected, but I get so many "What's this mushroom?" e-mails featuring photos of Amanita lanei that I feel obliged to put something up. However, be sure to visit the pages linked below for descriptions of the mushroom from folks who have actually seen it. Amanita lanei appears in the fall and winter in the Pacific Northwest--with Douglas-fir in the northern part of its range, and with Pacific madrone in southern Oregon and northern California. It has an orangish to orangish brown or yellowish brown cap that features a prominent white patch. Its stem almost always displays a ring above and a sacklike, white to yellowish volva below. Several fairly distinct versions of "Amanita lanei" have been noted by collectors, including a pale yellow (or nearly white) version that appears in the spring and smells like dead fish (see the link to Roger's Mushrooms, below, for a photo), and a dark brown version (see the photo to the right). Amanita expert Rodham Tulloss has tentatively proposed "stirps Lanei" (Mycologese for a group of closely related species centered around Amanita lanei) to account for the potential species diversity in the group. Compare this mushroom with Amanita velosa, which is superficially similar but lacks a ring. No species of Amanita should be considered for the table. Description: Ecology: Mycorrhizal with Douglas-fir in northern Oregon, Washington, and British Columbia--and primarily with Pacific madrone in southern Oregon and northern California; growing alone, scattered, or gregariously; fall and winter (except for the springtime version noted above); distributed in the Pacific Northwest. Cap: 8-25 cm (sometimes larger); round at first, becoming convex or nearly flat; sticky when fresh; smooth; orangish to orangish brown or yellowish brown; often paler toward the margin; typically with one or a few large, white patches; the margin faintly to strongly lined at maturity. Gills: Free from the stem or attached to it; white; close. Stem: 7-25 cm long; up to 4 cm thick; more or less equal; smooth or powdery; whitish, often discoloring and bruising slightly brownish; with a cream-colored, skirt-like ring; the base enclosed in a sack-like, white to yellowish volva that sometimes crumbles. Flesh: White throughout; thick. Odor: Not distinctive (fishy in the pale-capped, springtime form). Spore Print: White. Microscopic Features: Spores 9-12 x 6-7 µ; smooth; broadly elliptical; inamyloid. Basidia basally clamped. Subhymenium composed of branched structures; lacking inflated cells. Amanita calyptrata and Amanita calyptroderma are synonyms. REFERENCES: (Murrill) Saccardo & Trotter, 1898. (Smith, Smith & Weber, 1979; Thiers, 1982; Arora, 1986; Phillips, 1991/2005; Lindgren, 1998; Wood & Stevens, 2005; Tulloss, 2006.) I have not collected this mushroom. Further Online Information: Amanita lanei at MykoWeb |
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Cite this page as: Kuo, M. (2006, March). Amanita lanei. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/amanita_lanei.html |