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

LECCINUM

205

prolongation 23-200 p long, small cells (basidioles?) often when ventricose part 6-9 a wide also proliferating to 100 p or more long, clavate
cells with 2 sterigmata also present, and 10-15.u broad but no spores
seen attached, cell content bister in KOH, some broadly rounded cells
that are ventricose in midportion are also present (utriform types, as
found in Psathyrella of the Coprinaceae), the latter usually rare.
Pileus cutis a tangle of hyphae, the hyphae 4-12 (15) g wide,
mostly tubular but at times some cells disarticulating, content clay
colored in KOH, duller brown and granular to homogeneous in Melzer's,
the end-cells on narrower hyphae narrowly fusoid and up to 100. or
more long, those on broad hyphae often bullet-shaped, rarely ellipsoid,
short cells present in some hyphae. Clamp connections none.
Habit, habitat, and distribution.-Scattered on humus near
Mackinaw City, but in Emmet County, July 23, 1965, Smith 71844.
Observations.-In view of the fact that L. scabrum is now regarded
as essentially a species lacking pronounced color changes other than to
blue at times in the lower half of the stipe, it is logical to recognize the
present variant as a species, particularly in view of the proliferated
caulocystidia. We cannot be sure it is identical with Singer's L. scabrum
f. coloratipes. In any event, it is a species parallel in its aggregate of
characters with the others as recognized in this work, and we take
pleasure in dedicating it to Dr. Rolf Singer who at least called attention
to a similar if not identical fungus.
104. Leccinum subpulchripes Smith & Thiers, sp. nov.
Pileus 3-4.5 cm latus, convexus, glaber, viscidus, pallide argillaceus.
Contextus pallidus, immutabilis. Tubuli 14 mm longi, lignobrunnei; pori
minuti, grisei tactu luteobrunnei. Stipes 3-5.5 cm longus, 5-9 mm
crassus, deorsum tactu aurantio-cinnabarinus, furfuraceus; squamulae pallide subochraceae demum aurantiacae vel cinnabarinae. Sporae 14-18 X
5-6.5 M. Specimen typicum in Herb. Univ. Mich. conservatum est; prope
Culhane Lake, Luce County, August 2, 1965, legit Smith 71933.
Pileus 3-4.5 cm broad, convex, scarcely expanding, margin even;
surface glabrous, viscid, "pale pinkish buff' to near "pinkish cinnamon"
(dingy pale tan to pale cinnamon), becoming dingy dull clay color in age
or with the marginal area more or less olivaceous. Context pallid (olivebuff when water-soaked), unchanging when cut; taste acid, odor none,
with FeSO4 instantly blue to grayish blue.
Tubes wood-brown (all mature), ventricose, 14 mm deep, unchanging when cut, free to deeply depressed around the stipe; pores
minute, round, grayish, staining yellow-brown when bruised.