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

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THE BOLETES OF MICHIGAN

73. Leccinum pseudoinsigne Smith & Thiers, sp. nov.
Pileus 4-13 (16) cm latus, convexus, siccus demum subviscidus,
luteus vel aurantioluteus. Contextus albus, tactu subroseus demum
fuscus. Tubuli 1-1.5 cm longi, pallidi; pori pallidi tactu olivacei. Stipes
6-15 cm longus, 10-20 mm crassus, minute squamulosus vel punctatus;
squamulae pallidae demum tarde aurantio-brunneae, denique atratae.
Sporae (13) 14-17 X 3.5-5 p. Specimen typicum in Herb. Univ. Mich.
conservatum est; prope Brutus, Emmet County, July 12, 1968, legit
Smith 75559.
Pileus 4-13 (16) cm broad, obtuse to convex, the margin appendiculate; surface dry at first, becoming subviscid to viscid later depending on the weather; color "deep chrome" to "ochraceous-orange"
(bright yellow, orange-yellow, or bright orange to orange-red), fading to
orange-buff, on standing slowly orange brownish but never dull rusty
red. Context white, when cut in the young basidiocarps becoming pale
reddish cinnamon and finally bluish fuscous, in mature basidiocarps the
color change often going directly to violet-gray; odor and taste not
distinctive; with FeSO4 olive-gray.
Tubes 1-1.5 cm deep, depressed around the stipe, white then
olive-pallid and becoming near wood-brown; pores pallid to pale olivebuff and finally wood-brown, when lightly bruised staining olive, when
severely bruised staining olive-fuscous.
Stipe 6-15 cm long, 10-20 mm at apex, equal or nearly so, solid,
when cut staining weakly vinaceous in apex and finally changing to
violaceous-fuscous-or in older stipes going to violaceous-fuscous immediately, slowly staining reddish cinnamon in the base in some on
standing; surface covered with fine to moderately coarse ornamentation
pallid at first but slowly changing to orange-brown and long remaining
this color, finally blackish, ground color pallid.
Spore deposit near "bister" (deep yellow-brown as air-dried);
spores (13) 14-17 X 3.5-5 p, smooth, apex with an obscure thin spot,
narrowly fusoid in face view, narrowly somewhat inequilateral in profile,
wall about 0.2 thick, color ochraceous to pale tawny in KOH and
about the same in Melzer's.
Basidia 4-spored, clavate, 7-11 p broad, hyaline in KOH and weakly yellowish in Melzer's. Pleurocystidia scattered, clavate, mucronate, or
broadly fusoid-ventricose with short neck and subacute apex, content
ochraceous as revived in KOH and sometimes aggregated into an
amorphous mass; walls thin and smooth. Cheilocystidia clavate to subfusoid, 20-35 X 6-12 u, content ochraceous and pigment evenly distributed. Caulocystidia 33-70 X 9-20,, clavate, ovoid-pedicellate,