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

SUILL US

73

covered by the duff or those which have just emerged, to rather dark
reddish cinnamon in old exposed pilei. It lacks a false vail and the stipe
is covered by glandules which soon discolor to produce colored dots and
smears. The pileus may appear obscurely spotted in age, but this is
usually from the gluten which shrinks as it dries to produce the effect
noted.
Material examined.-Barry: Mazzer 930-62. Cheboygan: Smith
39372, 42093, 58143, 1951 (no date); Thiers 3749, 3780, 4327. Chippewa: N. J. Smith 59; A. H. Smith 43937, 50387, 50782, 57216; Thiers
3140. Crawford: Smith 49574; Thiers 3741. Gratiot: Potter 11857,
11948, 12107, 12438, 12445, 12459, 12473, 12541, 12958, 13425,
13468, 13686, 13727, 14079, 14175. Livingston: Smith 66417, 75241.
Luce: Smith 36172, 36805, 58017; Thiers 4058, 4105. Mackinac: Smith
42899; Thiers 3671. Marquette: Bartelli 257, 267, 370. Midland: Smith
72799. Montcalm: Potter 9026, 9033. Oakland: Nickell 42; Smith 7224,
66453. Ogemaw: Smith 50495, 67551. Roscommon: Smith 1202. Washtenaw: Kauffman 8-6-25; Smith 62361, 62369, 62507, 66399, 66421,
66442, 66476, 72802.
28. Suillus punctatipes (Snell & Dick)-Smith & Thiers
Contrib. toward a Monograph of N. Amer. Sp. of Suillus p. 94, 1964
Boletinus punctatipes Snell & Dick, Mycologia 33:36. 1941.
Illus. Pls. 33-34.
Pileus 8-16 (20) cm broad, convex or irregular from mutual pressure, broadly convex in age or margin spreading and wavy; margin naked
when young, surface glabrous and glutinous but at times virgate beneath
the slime; color pinkish cinnamon to "mikado-brown" (vinaceous
orange-brown), or finally when old becoming grayish to violaceousbrown ("benzo-brown"). Context thick and white except for a yellow
zone above the tubes and a vinaceous line under the cutis, odor and
taste mild, KOH on white areas pinkish, on the vinaceous zone olive, on
the cutis olive-gray.
Tubes up to 1 cm deep, when mature, mostly 4-7 mm deep,
decurrent, pale yellow becoming ocher-yellow, not staining; pores
boletinoid in arrangement from the first, in age conspicuously radial in
arrangement and 1-3 (4) mm in diameter radially, cream color young,
ocher-yellow mature and often grayish in age, not staining brown or
blue when injured.