The boletes of Michigan, by Alexander H. Smith and Harry D. Thiers.

60

THE BOLETES OF MICHIGAN

Observations.-This is one of the most readily recognized species
of Suillus in Michigan because of the baggy veil leaving an annulus that
collapses and becomes inconspicuous in age, the ochraceous to salmonochraceous tones of the interior of the stipe, and the general darkening
of the pileus as it ages. The most closely related species is the southern
Suillus cothurnatus Singer. We now strongly suspect that S. pinorigidus
Snell & Dick is the same as S. subluteus.
Material examined.-Chippewa: Shaffer 1947; Smith 43936,
50371, 58196. Emmet: Smith 42030, 42050. Luce: Smith 36961,
42475, 42290, 50235, 50403, 58019. Mackinac: Smith 43784. Marquette: Bartelli 2440. Ogemaw: Smith 67441, 67495, 67580.
19. Suillus albidipes (Peck) Singer
Farlowia 2:45. 1945
Boletus albidipes Peck, Bull. N. Y. State Mus. 57:22. 1912.
(Not Boletus granulatus var. albidipes Peck, Ann. Rept. N.Y. State Mus. 54:168.
1901.)
Suillus albidipes (Peck) Snell, Mycologia 37 (June): 378. 1945.
Suillus granulatus subsp. albidipes (Peck) Snell & Dick, Mycologia 53:232. 1961.
Illus. Pls. 22-23.
Pileus 4-10 cm broad, convex becoming broadly convex; surface
glutinous to viscid, color white or pallid varying to near "vinaceousbuff' on young pilei, by maturity pale ochraceous or varying toward
vinaceous-cinnamon (darkening as in S. granulatus), when old often
spotted by the drying slime; margin at first decorated by a dry cottony
roll of whitish to vinaceous-buff material representing a false veil which
seldom comes in contact with the stipe, in age this tissue collapsing and
evanescent but at times forming pallid patches which remain along the
margin in mature specimens. Context white, slowly becoming yellow,
odor and taste not distinctive, with KOH pink, then lilac-gray, with
FeSO4 olive-blue on context, slowly olive-gray on pileus surface.
Tubes about 5 mm deep where context is about 1 cm deep, pale
dingy yellow, adnate becoming adnexed; pores round, minute (about 3
per mm), yellow, typically not staining much when bruised.
Stipe 3-6 cm long, 10-15 mm thick, equal, bulbous, or tapered at
the base, solid, yellowish within but cortex of midportion reddish in
age, lemon-chrome above, in age dingy brown in the base; surface white
at first and not glandular dotted, but in age dark very fine glandular
dots present lower down, slowly yellow above and reddish brown below.