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

80

THE BOLETES OF MICHIGAN

Tube trama of a narrow floccose central strand of interwoven
hyphae flanked on either side by gelatinous subparallel to slightly
divergent hyphae (as revived in KOH). Pileus with a cutis of appressed golden to lemon-yellow hyphae 8-12 pt broad, the cells readily
collapsing, densely incrusted with pale yellow granules. Context hyphae
floccose, hyaline to pale yellow in KOH and with fine yellowish incrustations, pale dull vinaceous-red in Melzer's. Clamp connections absent.
Chemical reactions: KOH on surface of the pileus brownish red,
on context reddish, pinkish, or lilac, negative on tubes. NH40H on
surface of pileus clear red or pink, context pinkish red, on tubes lilac.
Melzer's on context deep yellowish brown with a greenish zone around
the margin of the drop, on the stipe the same reaction.
Habit, habitat, and distribution.-Gregarious or scattered in conifer
forests, under Pinus, Abies, and Picea in the fall. It has not been found
yet in Michigan but it is to be expected along the south shore of Lake
Superior.
Observations.-The dull ferruginous pileus, yellowish brown tubes
which readily separate from the pileus in spite of the pores being
boletinoid, the felty floccose veil and viscid pileus are the important
field characters.
32. Fuscoboletinus glandulosus (Peck) Pomerleau & Smith
Brittonia 14:162. 1962
Boletinus glandulosus Peck, Bull. N. Y. State Mus. 131:34. 1909.
Suillus glandulosus (Peck) Singer, Lilloa 22:657. 1949.
Illus. Pls. 38-39.
Pileus 3-12 cm broad, convex, then flattened to shallowly depressed; surface glutinous to very slimy, the thick slime giving a spotted
or reticulate appearance to the surface, with an ochraceous ground color
showing off the netted pattern, red when young, becoming "mahoganyred" to chestnut or "burnt-sienna," unchanging or darker with age and
the slime becoming blackish on old pilei; margin concolorous, incurved
at first, often elevated or flared later, appendiculate with veil remnants,
narrowly sterile. Context up to 12 mm thick, firm, watery yellow,
flavous ("amber-yellow" to "pinard-yellow"), becoming paler and near
lemon-yellow, reddish around larval tunnels, separated from the tube
layer by a brilliant yellow line; taste mild; odor mild to slightly pungent
and unpleasant.