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Tricholoma pardinum

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

by Michael Kuo

Tricholoma pardinum is a large, attractive Tricholoma found under conifers in northern and montane North America--and under hardwoods in coastal California. Its overall appearance, mealy odor, and fairly large size make it very similar to Tricholoma venenatum--a slightly paler, somewhat less scaly, hardwood-loving species that also differs microscopically.

Some mycologists (including Shanks, 1994; and Ovrebo, 1980) consider Tricholoma tigrinum, the "tiger Tricholoma," to be a synonym of Tricholoma pardinum. As a cat lover I feel obligated to point out that tigers are orange with black stripes and, well . . . look at the mushroom in question. It looks more like a snow leopard to me.


Ecology: Mycorrhizal with conifers in northern and montane areas, but associated with tanoak, madrone, and live oak on the West Coast; growing alone, scattered or gregariously; fall (winter on the West Coast); widely distributed in northern and montane North America, and on the West Coast.

Cap: 2-15 cm; broadly convex, flat, or broadly bell-shaped; dry; brown to gray-brown when unexpanded, but soon whitish to pale grayish brown underneath small, regularly scattered, brown scales.

Gills: Attached to the stem by a notch; close; whitish to dull grayish; rarely discoloring brownish on the edges.

Stem: 2.5-12 cm long; 1-3 cm thick; equal or somewhat swollen below; with silky appressed fibers; dry; white; sometimes discoloring brownish where handled.

Flesh: Firm; white to pale grayish; not changing on exposure.

Odor and Taste: Mealy.

Spore Print: White.

Chemical Reactions: KOH on cap surface negative.

Microscopic Features: Spores (6-) 8.5-9.5 (-10.5) x (4-) 6-7 µ; smooth; elliptical; inamyloid. Pleurocystidia absent. Cheilocystidia rare to abundant; more or less clavate; quickly collapsing; embedded; to about 40 x 20 µ. Pileipellis a cutis of cylindric elements 2-8 µ wide; not gelatinized. Clamp connections present throughout.

REFERENCES: Quélet, 1873. (Ovrebo, 1973; Smith, 1975; Smith, Smith & Weber, 1979; Ovrebo, 1980; Arora, 1986; States, 1990; Breitenbach & Kränzlin, 1991; Phillips, 1991/2005; Shanks, 1994; Barron, 1999; Miller & Miller, 2006.) Herb. Kuo 06100306.

Tricholoma tigrinum and Tricholoma pardalotum are synonyms, according to most mycologists.

Further Online Information:

Tricholoma pardinum at Roger's Mushrooms


Tricholoma pardinum

Tricholoma pardinum

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Kuo, M. (2008, December). Tricholoma pardinum. Retrieved from the MushroomExpert.Com Web site: