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Suillus pictus

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

by Michael Kuo

Whenever I launch into one of my "I hate Suillus" tirades, one of my mushrooming buddies reminds me that Suillus pictus is a joy to find, because it's so beautiful. Its gorgeous rose-brick cap and stem colors contrast well with its pale yellow pore surface, and we find it under eastern white pine in northern Michigan every year, popping up frequently--and in unexpected places, adding a dash of color to a canvas of browns. And: Suillus pictus is one of the few Suillus mushrooms that doesn't suffer from whatever rare disease it is that makes their slime-o-factory glands overproduce. True enough--but it's still a Suillus. So I leave you to make your own judgments about this admittedly beautiful mushroom. I, meanwhile, will seek counseling for my problems with prejudice. You see, Doctor, as a child I was beaten with Suillus . . .

Description:

Ecology: Mycorrhizal with eastern white pine; growing alone or gregariously; late summer and fall; northeastern North America, extending as far west as Minnesota and as far south as Kentucky.

Cap: 3-12 cm; convex with an inrolled margin when young, but soon broadly convex to flat; covered with large pinkish to brick-rose scruffies; whitish partial veil tissue often hanging from the margin; dry; fading with age.

Pore Surface: Covered with a whitish partial veil when young; yellow, darker with age; sometimes slightly running down the stem; sometimes bruising reddish or brownish; pores small to large, .5-5 mm across, vaguely radially arranged; tubes 4-8 mm deep.

Stem: 4-12 cm long; 1-2.5 cm thick; equal or sometimes wider in the base; without glandular dots, but shaggy with scruffies below the whitish to grayish ring; not bruising; frequently with a whitish to grayish ring.

Flesh: Yellow throughout, sometimes staining slightly reddish.

Odor and Taste: Not distinctive.

Chemical Reactions: Cap surface black with KOH, iron salts, or ammonia; flesh greenish black with iron salts, olive to greenish black with KOH or ammonia.

Spore Print: Brown.

Microscopic Features: Spores 8-12 x 3.5-5 µ; smooth; subfusoid.

Suillus spraguei and Boletinus pictus are synonyms.

REFERENCES: (Peck, 1889) Kuntze, 1898. (Frost, 1874; Coker & Beers, 1943; Singer, 1945; Smith & Thiers, 1964; Snell & Dick, 1970; Smith & Thiers, 1971; Grund & Harrison, 1976; Smith, Smith & Weber, 1981; Weber & Smith, 1985; Arora, 1986; Phillips, 1991/2005; Lincoff, 1992; Both, 1993; Barron, 1999; Bessette, Roody & Bessette, 2000; Roody, 2003; McNeil, 2006; Miller & Miller, 2006; Kuo, 2007.) Herb. Kuo 09019525, 09150711.

Further Online Information:

Suillus pictus in Smith & Thiers, 1971
Suillus pictus at Roger's Mushrooms

 

Suillus pictus

Suillus pictus

Suillus pictus

Suillus pictus

Suillus pictus



Hypomyces completus

Suillus pictus is the most common host for Hypomyces completus, a white fungus that eventually parsitizes the whole mushroom. For more information on Hypomyces completus, see the USDA's Hypomyces Web site (direct link to species not available due to Javascript and frames).

Hypomyces completus



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Cite this page as:

Kuo, M. (2004, November). Suillus pictus. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/suillus_pictus.html