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

LECCINUM

197

Spore deposit dull cinnamon ("Sayal-brown"); spores 14-17 X
4.5-5.5 (6)1, smooth, pale tawny in KOH, duller in Melzer's, narrowly
suboblong to obscurely fusoid in face view, in profile obscurely inequilateral from a shallow broad suprahilar depression, wall only slightly
thickened and no apical differentiation evident.
Basidia 4-spored, 18-23 X 8-9 u, clavate, very soon gelatinizing.
Pleurocystidia scattered to rare, 36-45 X 9-15 /, fusoid-ventricose, apex
subacute, hyaline in KOH and in Melzer's. Caulocystidia smooth, clavate
and up to 40 X 18 u, broadly fusoid-ventricose and 40-60 X 15-22 u, or
elongate and up to 70 X 15,, content mostly hyaline in KOH but in
some pale ochraceous.
Pileus trichodermium, if one is present at first, collapsing and
forming a cutis of appressed tangled smooth hyphae 5-11 / wide, with
homogeneous yellow-brown content in KOH (near "argus-brown"),
often only the terminal cell colored, some terminal cells bullet-shaped
and with granular to somewhat stringy content in Melzer's but lacking
pigment globules. Subcutis of hyphae which are hayline in KOH, interwoven, subgelatinous, and orange-ochraceous in Melzer's. Hyphae of context with homogeneous reddish orange content when revived in Melzer's.
Clamp connections absent.
Habit, habitat, and distribution.-Scattered under oak and pine,
Douglas Lake, June, rare.
Observations.-This species is outstanding because of its dull cinnamon spores, tubes dull cinnamon, the rusty cinnamon stains on the
pores and the dull cinnamon stipe ornamentation along with the strong
raphanoid odor. This variant appears to be isolated in its combination of
characters and is placed here tentatively. As wood-brown stains are very
slow to develop, the species is placed here rather than in subsection
Fumosa. It will also be noted that in the whitish species of this section
the color change occurs to a greater or lesser degree in some of them.
98. Leccinum flavostipitatum Dick & Snell
Mycologia 57:456. 1965
Pileus 6-10 cm broad, very minutely reticulately fibrillose, the disc
later subglabrous to glabrous, gray, dark gray, brownish, or blackish
gray, occasionally with tinges of greenish. Context dingy white changing
very slowly to pale salmon-pink or to bright blue-green quickly when
wet.
Tubes depressed to free, very dingy white or dirty yellowish white,
quite long; pores concolorous with sides at first.