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

LECCINUM

135

brownish in the pileus, with a dark olive watery line above the tubes,
when dried mostly pallid but with some gray streaks or patches, with
FeSO4 bluish olive.
Tubes pallid becoming avellaneous, slightly depressed around the
stipe; pores pallid staining yellow and finally yellowish brown, when
severely bruised not becoming fuscous or vinaceous-gray, when dried
dingy cinnamon.
Stipe 10-13 cm long, 1-1.5 cm thick at apex, nearly equal, solid,
fibrous, pallid within and when cut slowly very pale vinaceous in places,
soon staining rich indigo-blue in the base; surface pallid above under the
brown ornamentation, extreme apex whitish, lower down the ornamentation moderatly coarse and brown (but drying blackish), surface flushed
yellowish to greenish in the midportion and drying with these tones
evident, as in L. potteri.
Spore deposit dingy clay color as air-dried, but on standing darkening to dingy cinnamon; spores 14-17 (19) X 3.5-4.5 u, smooth, wall
scarcely thickened, narrowly subfusoid in face view, narrowly inequilateral in profile, suprahilar depression broad and shallow, in KOH clay
color, in Melzer's yellowish brown.
Basidia 4-spored, 16-20 X 8-10, yellowish hyaline in KOH and
yellowish in Melzer's. Pleurocystidia-none seen. Cheilocystidia mostly
clavate, 20-30 X 7-9 p, ochraceous in KOH to hyaline, walls thin and
soon gelatinizing. Caulocystidia 34-50 (60) X 8-15 p, yellowish hyaline
in KOH and Melzer's or with smoky brown content in KOH.
Pileus cutis of tangled hyphae 5-8 (12) p wide, cells 30-70 p long
or longer, end-cells not distinctively differentiated, walls smooth, thin,
no disarticulation of cells noted, content dull orange in KOH, in
Melzer's the content soon forming minute granules, very few refractive
thickenings seen against interior wall surfaces. Subcutis of interwoven
gelatinous hyaline hyphae 2.5-5 u wide, not colored in KOH or Melzer's.
Context hyphae hyaline, interwoven, 6-15u wide, lacking colored content in Melzer's or refractive content in KOH. Clamp connections absent. No colored content in Melzer's or refractive content in KOH.
Clamp connections absent. No colored pigment globules present in any
hyphae when mounted in Melzer's.
Habit, habitat, and distribution.-Solitary in mixed woods with
pine, Cheboygan and Barry counties in the fall; rare.
Observations.-This is a distinctive species related to L. potteri in
the narrow spores and the color of the stipe especially as dried, but the
cuticular hyphae are not lemon-yellow in KOH and no veil material was
found. There was no change to gray on fresh material though as dried
some does show on cut surfaces.