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

64

THE BOLETES OF MICHIGAN

sections are revived in KOH. Caulocystidia resembling the cheilocystidia,
in massive clusters and dark brown amorphous material often obscuring
the entire caulohymenium.
Tube trama of gelatinous hyaline hyphae diverging to the hymenium. Epicutis of pileus a pellicle of appressed gelatinous yellowish
hyphae 2.5-5 pu in diameter. Clamp connections absent.
Habit, habitat, and distribution.-Common under white pine, solitary, gregarious, or cespitose, late summer and fall. It occurs throughout
the state where white pine grows, but is not common in plantations
until the trees have reached pole size or larger.
Observations.-The slender stipe, bright yellow color, yellow pores
when young becoming wide in age, cottony tissue along the pileus margin
at first, and the epicutis of the pileus present in the form of a pellicle
rather than a trichodermium all aid in its accurate identification. S.
sibiricus is the most closely related species, but has a thicker stipe and
some basidiocarps in a group are usually annulate.
Material examined.-Cheboygan: Charlton G-113; Sharp 3819;
Smith 42330, 50148, 62973, 63877, 72402; Thiers 3783. Chippewa:
Kauffman 7-14-06; Smith 72419; Thiers 4030. Crawford: Smith 57499.
Emmet: Shaffer 1892; Smith 37123, 42932, 43547, 58080; Thiers
1358, 3244, 3803. Gratiot: Potter 8705, 8946, 9024, 11208, 11546,
11856,11947,12115,12875,13244, 13492,14371. Luce: Smith 39535,
50267. Mackinac: Smith 42896. Marquette: Bartelli 271. Montcalm:
Potter 6561, 6657, 10110, 10251, 13179, 13662. Oakland: Smith 7221.
Ogemaw: Smith 67544, 67587, 66924. Washtenaw: Homola 1070; Rea
H-722; Smith 6912, 7167, 64596; Thiers 4569.
22. Suillus glandulosipes Smith & Thiers
Contrib. toward a Monograph of N. Amer. Sp. of Suillus p. 86. 1964
Pileus 2.3-6 (12) cm broad, convex to broadly convex, surface
slimy-viscid when fresh, pale yellow becoming lightly pinkish tan, sometimes virgate beneath the slime, pellicle separable, margin decorated with
remains of a false veil; the latter cottony and soft, soon evanescent.
Context firm, ivory-yellow, up to 3 cm thick, with KOH lilac-gray, with
FeSO4 olive-green; odor and taste slight.
Tubes about 4 mm deep, depressed at the stipe or adnate to
decurrent, yellow; pores small (about 1 mm wide), yellow.
Stipe 2.5-7 cm long, 4-12 (18) mm thick at apex, nearly equal or
slightly enlarged downward, solid, interior white to "pale pinkish cinnamon," bright pale yellow in age; surface covered with pale brown glan