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

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THE BOLETES OF MICHIGAN

Subgenus ROSEOSCABRA (Singer), comb. nov.
Leccinum section Roseoscabra Singer
Amer. Midl. Nat. 37:124. 1947
Stirps CHROMAPES
38. Tylopilus chromapes (Frost) Smith & Thiers, comb. nov.
Boletus chromapes Frost, Bull. Buff. Soc. Nat. Sci. 2:105. 1874.
Leccinum chromapes (Frost) Singer, Amer. Midl. Nat. 37:124. 1947.
Illus. Pls. 44-45.
Pileus (3) 5-11 (15) cm broad, convex to hemispheric, becoming
broadly convex to plane or occasionally shallowly depressed in age, margin entire, fertile, often flared and irregular in age, in wet weather the
surface dry, smooth to uneven, rarely somewhat pitted, subtomentose or
in age with a felted-fibrous surface (matted down), occasionally appearing glabrous with age, somewhat tacky to the touch at times, beautiful
pink ("chatenay-pink" to "light congo-pink" to "old rose," occasionally
near "Pompeian-red" to "deep Corinthian-red" to "Prussian-red") overall
at first but fading out to pallid in places and in age often alutaceous
tinged with rose. Context 5-20 mm thick, floccose, white or faintly pink
or rose tinted at first, soft, unchanging or rarely slowly becoming yellowish in spots; taste mild (pileus surface usually distinctly acid to the
tongue but not so in some cases-Coker) (taste very slightly acidThiers); odor not distinctive.
Tubes 5-12 mm deep, depressed to nearly free, white at first, then
yellowish ("light buff' to "pale ochraceous-buff') and finally flesh
colored ("pale vinaceous-fawn"), in age more brownish ("wood-brown"),
unchanging when bruised (at times rosy when bruised-Coker); pores
small, 2-3 per mm, round to angular, white when young.
Stipe 4-13 (17) cm long, 1-2.5 cm thick at apex, equal to tapering
toward either apex or base, usually pinched off at the base, solid, flesh
firm, pallid above, deep chrome-yellow downward (mycelium chromeyellow-Coker), surface dry, paler pink than pileus at first but soon
fading to pallid, scabrous dotted above or nearly to base but ornamentation not darkening, unpolished and uneven over lower part.
Spore deposit vinaceous-fawn to near "wood-brown" (rosy brown
or dull salmon-Coker & Beers, "chamois color"-Farlow, chestnut