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Suillus brevipes

[ Basidiomycetes > Boletales > Suillaceae > Suillus . . . ]

by Michael Kuo

Suillus brevipes can be found under true pines (species of Pinus, with bundled needles) throughout North America. It is very similar to the better known Suillus granulatus, but differs in its more evenly colored cap surface, the lack of well developed glandular dots on the stem, and in its characteristic stature: the cap long remains convex, and the stem is often (though not always) short and squat.


Ecology: Mycorrhizal with true pines; growing alone, scattered, or gregariously; late summer and fall; widely distributed in North America.

Cap: 5-10 cm; convex becoming broadly convex and remaining so for a long time--or eventually becoming more or less flat; slimy; smooth; dark to dark reddish brown, fading to cinnamon or yellowish brown; the margin at first incurved and pale, but naked (without veil remnants).

Pore Surface: Pale yellow, becoming dingy olive; 1-2 circular pores per mm; tubes to about 1 cm deep.

Stem: 2-5 cm long; 1-3 cm thick; swollen and squat when young; often short, even at maturity; white at first, becoming pale yellow; glandular dots absent when young, and poorly developed or absent when mature; without a ring.

Flesh: White at first, becoming yellow in age; soft; not staining when sliced.

Odor and Taste: Not distinctive.

Chemical Reactions: Ammonia purplish on cap surface; pinkish to negative on flesh. KOH dark gray to black on cap surface; lilac to gray on flesh. Iron salts olive on flesh.

Spore Print: Brown to dull cinnamon.

Microscopic Features: Spores 7-10 x 3 µ; smooth; subfusoid. Pleuro- and cheilocystidia cylindric to clavate; up to about 50 x 10 µ; hyaline to brownish.

REFERENCES: (Peck, 1885) Kuntze, 1898. Saccardo, 1888; Coker & Beers, 1943; Singer, 1945; Smith & Thiers, 1964; Snell & Dick, 1970; Smith & Thiers, 1971; Thiers, 1975; Grund & Harrison, 1976; Smith, Smith & Weber, 1981; Weber & Smith, 1985; Arora, 1986; States, 1990; Phillips, 1991/2005; Lincoff, 1992; Both, 1993; Evenson, 1997; Barron, 1999; Bessette, Roody & Bessette, 2000; McNeil, 2006; Miller & Miller, 2006; Ortiz-Santana et al., 2007.) Herb. Kuo 08130708.

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Suillus brevipes

Suillus brevipes

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Kuo, M. (2009, April). Suillus brevipes. Retrieved from the MushroomExpert.Com Web site: