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Tricholoma vaccinum

[ Basidiomycetes > Agaricales > Tricholomataceae > Tricholoma . . . ]

by Michael Kuo

Tricholoma vaccinum can be found throughout much of North America, growing under conifers. It has a reddish brown to brownish orange cap that is covered with small scales and fibers, and gills that are whitish but usually develop reddish brown spots and discolorations. The whitish flesh often turns slowly pinkish when sliced, and the odor is often mealy. It is one of the few species of Tricholoma that has a cortina, but you will need to be examining very young specimens to see this feature.

Description:

Ecology: Mycorrhizal with conifers--especially spruces and pines; growing alone, scattered, or gregariously; fall (also over winter in warm climates); widely distributed in North America.

Cap: 2-7 cm; convex or somewhat conic, becoming broadly convex to nearly flat when mature; dry; covered with fibrils that become more prominent and aggregated into scales with maturity; reddish brown to wine colored or brownish orange, often fading to orangish tan with age; the margin at first inrolled, later often featuring tattered remnants of the cortina.

Gills: Usually attached to the stem by a notch; close; whitish; often discoloring and spotting brown to cinnamon; initially covered by a whitish cortina.

Stem: 3-8 cm long; .5-2 cm thick; more or less equal; usually adorned with brown scales and fibers over a whitish ground color; becoming hollow.

Flesh: Whitish; often changing slowly to pinkish on exposure.

Odor and Taste: Odor not distinctive or, more commonly, mealy; taste mild, mealy, or bitter.

Spore Print: White.

Chemical Reactions: KOH on cap surface negative. Iron salts grayish on the stem base; olive gray on cap surface.

Microscopic Features: Spores 6-7.5 x 4-5 µ; smooth; elliptical; inamyloid. Pleurocystidia and cheilocystidia absent. Pileipellis a cutis of cylindric elements 3-14 µ wide; brown to reddish brown in KOH. Clamp connections absent.

REFERENCES: (Schaeffer, 1774) Kummer, 1871. (Fries, 1821; Quélet, 1886; Saccardo, 1887; Kauffman, 1918; Ovrebo, 1973; Smith, 1975; Smith, Smith & Weber, 1979; Ovrebo, 1980; Arora, 1986; Breitenbach & Kränzlin, 1991; Phillips, 1991/2005; Lincoff, 1992; Shanks, 1994; Evenson, 1997; Barron, 1999; Roody, 2003; McNeil, 2006; Miller & Miller, 2006.)

Tricholoma imbricatum is a very similar species that lacks the cortina and has a browner, somewhat less scaly cap surface.

Further Online Information:

Tricholoma vaccinum at Roger's Mushrooms

 

Tricholoma vaccinum

Tricholoma vaccinum

Tricholoma vaccinum



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Cite this page as:

Kuo, M. (2008, December). Tricholoma vaccinum. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/tricholoma_vaccinum.html