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

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THE BOLETES OF MICHIGAN

handled the fingers quickly becoming stained sordid ochraceous and the
fragrant odor can be noted on them.
Spore deposit dark olive-brown fresh; spores 7.5-10 (12) X
3-3.5 iu, in face view elongate-elliptic to subfusiform, in profile narrowly
inequilateral to swaybacked and with a broad suprahilar depression,
smooth, pale dingy yellowish in Melzer's with a few becoming dull
tawny-brown (faintly dextrinoid), dingy pale buff in KOH varying to
pale olive yellowish.
Basidia 2- and 4-spored, 16-20 X 5.5-7 u, sections of hymenium
dingy yellowish in KOH, individual basidia nearly hyaline, yellowish
hyaline in Melzer's. Pleurocystidia of 2 types: (1) as cystidioles 18-26 X
6-8 pi with hyaline content, with thin smooth walls and an obtuse to
subacute apex; (2) in clusters with dark bister to dull rusty brown
incrusting material around the base of the cluster, individual cystidia
36-55 X 7-11 g and clavate to subfusoid, with hyaline to brown content in KOH and Melzer's. Cheilocystidia in masses and with brown
content, incrusted around the base as revived in KOH, clavate to subfusoid and 50-70 X 7-14 u. Caulocystidia similar in size and coloring to
cheilocystidia and frequently forming an hymeniform layer over large
areas of the upper part of the stipe.
Tube trama of subparallel elements in the central area and somewhat divergent toward the subhymenium, cells pale yellowish to hyaline
in KOH and Melzer's; the hyphae 5-8 i in diameter and subgelatinous.
Epicutis of pileus a tangled trichodermium of gelatinous hyphae, the
end-cells of which are narrowly clavate to tubular, 6-8 il in diameter, the
main filament 4.5-6 pi in diameter, some hyphae with dark brown content but most merely yellowish throughout, considerable debris held in
the layer but incrustations were seen only near the base of the trichodermium and on the floccose hyphae beneath. No clamp connections
present and no amyloid reactions present on any of the tissues as observed in Melzer's.
Habit, habitat, and distribution.-Scattered under spruce and
balsam in a sphagnum bog, Burt Lake, Cheboygan County, late summer
and early fall. Not uncommon in the one locality and probably widely
distributed throughout the state in similar habitats.
Observations.-This is a well-defined species distinct from S. hirtellus by the conspicuous coating of glandulae on the stipe and more
orange-buff colors. It differs from both S. hirtellus and S. subaureus in
the more slender stature and more pulvinate pileus as well as in having a
fragrant odor. To determine the presence of the latter one should have
at least a half dozen basidiocarps.