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

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THE BOLETES OF MICHIGAN

"Plant 3-4' high, pileus 2-3' broad, stem 3"-6".
"Found in deciduous woods. Sand Lake. August.
"The stem is generally brighter colored than the pileus and retains
its color longer. This species should be referred to the Calopodes."
The following data are from the type (Sand Lake).
Spores 9-12 (13) X 3.5-5 pI, smooth, lacking a pore or thin spot at
apex, color in KOH weakly ochraceous, in Melzer's merely yellowish,
shape in face view suboblong, in profile suboblong to obscurely inequilateral, suprahilar area in many scarcely flattened; wall about 0.2 g
thick. Occasional large ellipsoid spores 13-14 X 6-7.5 l present.
Basidia 4-spored, 26-35 X 8-10 u, clavate, hyaline in KOH and
yellowish in Melzer's. Pleurocystidia rare, 28-37 X 7-12 u, fusoid-ventricose, content "empty" in KOH or Melzer's, thin-walled, smooth, hyaline. Cheilocystidia scattered among basidioles, 18-28 X 5-10 J, similar
in shape to pleurocystidia.
Tube trama of the Boletus subtype, inamyloid in all respects; laticiferous elements present but not conspicuous. Pileus cuticle a strong
trichodermium, the elements 4-8 (10) / wide and arranged in a distinct
palisade, the cells long and often flexuous but essentially tubular, endcells elongate and apex mostly obtuse to rounded, tubular to weakly
cystidioid, content yellowish in KOH and brownish orange in Melzer's,
the lower cells in the elements with pale ochraceous incrustations on the
walls or seen revived in KOH but smooth in Melzer's. Hyphae of the
subcutis and adjacent context with brownish orange content in Melzer's
and walls smooth in that medium. Clamp connections none.
Observations.-The distinguishing features of this species are represented by the strong palisade of the elements of the pileus cuticle having
elongate narrow terminal cells, the presence of an ochraceous to claycolored incrusting material over the walls of many of the hyphae in the
subcutis and lower cells of the trichodermial elements, the short spores,
the lack of conspicuous pleurocystidia, the red pileus rapidly becoming
buff-brown, the more or less persistent reddish colors over the lower
part of the stipe and the bitter taste (the last as reported by Coker and
Beers, 1943, and by Snell, personal communication).
Such a species as this has not as yet, to our knowledge, been
reported from Michigan, but since the name has been used frequently
for B. pseudopeckii, we include it here as part of the clarification of
taxonomic concepts in this group.