This species resembles the preceding one in general appearance, but it is very distinct by its much longer spores and by the velvety hairiness toward the base of the stem. Peck, Boleti of the U.S.
Boletus subvelutipes is common in some localities in Pennsylvania, especially on the Springton Hills, in chestnut and oak woods. I have frequently eaten it and found it excellent. Others should carefully test it.
B. fir´mus Frost—firm. Pileus convex, very firm, slightly tomentose, gray, often pitted. Flesh yellowish or deep-yellow, changing to blue where wounded. Tubes adnate, deeply arcuate, unequal, yellow, their mouths tinged with red. Stem solid, hard, very finely reticulated, yellowish, reddish at the base. Spores 13×3µ.
Pileus 2.5–4 in. broad. Stem 2–4 in. long.
Rich moist wood. New England, Frost.
Apparently a well-marked and very distinct species. According to the author, it is readily distinguished by its tenacity and generally distorted growth. I have not seen it nor the next. Peck, Boleti of the U.S.
Professor Peck’s measurement of spores, 50th Report, New York State Botanist, is 13µ long, 6µ wide.
B. magnis´porus Frost. Pileus convex, firm, tomentose, golden-yellow; tubes scarcely adnate, even, greenish-yellow, their mouths light cinnabar-red. Stem long, slender, yellow above, red below. Spores 15–18×6µ.
Pileus 2.5 to 3.5 in. broad.
Woods and thickets. New England, Frost; Ohio, Morgan. Peck, Boleti of the U.S.