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

66

THE BOLETES OF MICHIGAN

"vinaceous-buff' to "vinaceous-fawn" smears and dots, ground color yellow in age, the glandular areas discoloring to gray or blackish on drying;
no veil present at any stage.
Spore deposit dull cinnamon; spores 7-9 X 2.5-3.2 /, nearly oblong in face view, somewhat inequilateral in profile; smooth, a hyaline
sheath evident, nearly hyaline in KOH, pale yellow in Melzer's.
Basidia 24-28 X 6-7 p, hyaline in KOH, yellowish in Melzer's,
clavate, 4-spored. Pleurocystidia 49-60 X 6-9 g, subcylindric to narrowly
clavate, scattered, typically in fascicles, often with bister content and
dark brown amorphous pigment masses incrusting the bundle at the level
of the hymenium. Cheilocystidia in larger aggregations, more capitate
and darker colored when revived in KOH but otherwise similar to the
pleurocystidia. Caulocystidia numerous to abundant, often in fascicles,
similar to the pleurocystidia or with more apical enlargement individually, abundant over large areas, content hyaline to bister when revived in
KOH, mostly incrusted with amorphous material.
Tube trama of gelatinous divergent hyphae from a central floccose
strand. Epicutis of pileus a layer of narrow hyphae (3-6 g) with gelatinous walls and with bister content in KOH and in Melzer's. Hyphae of
context floccose and hyaline. Clamp connections absent.
Habit, habitat, and distribution.-Scattered to abundant under
white pine, late summer and early fall, not rare within the natural range
of white pine but not found by us as yet in plantations.
Observations.-The white pileus, conspicuously smeared stipe, and
lack of a veil in conjunction with proximity to white pine make this an
easily recognized species.
Material examined.-Alger: Mains 32-198. Cheboygan: Chmielewski
15, 38; Smith 41893. Chippewa: Smith 71907, 72418. Crawford: Shaffer 2180; Smith 57500. Emmet: Smith 62974. Gratiot: Potter 3644,
4077, 5733, 8311. Luce: Smith 13304, 36918, 37006, 37150, 38049,
36930, 42228, 42629, 44114, 57950, 58117; Thiers 3860, 4334. Marquette: Bartelli 267, 372, 2526. Oakland: Smith 7230. Ogemaw: Smith
67556.
24. Suillus brevipes (Peck) Kuntze
Rev. Gen. PI. 3:535. 1898
Boletus viscosus Frost, Bull. Buff. Soc. Nat. Sci. 2:101. 1874.
(Not B. viscosus Vent.)
Boletus brevipes Peck, Ann. Rept. N. Y. State Mus. 38:110. 1885.