I have not recognized it. CAUTION.
B. Fros´tii Russell. Pileus convex, polished, shining, blood-red, the margin thin. Flesh scarcely changing to blue. Tubes nearly free, greenish-yellow, becoming yellowish-brown with age, their mouths blood-red or cinnabar. Stem equal or tapering upward, distinctly reticulated, firm, blood-red. Spores 12.5–15×5µ.
Pileus 3–4 in. broad. Stem 2–4 in. long, 3–6 lines thick.
Grassy places under trees or in thin woods. New England, Frost; New York, Peck; New Jersey, Ellis.
This is a highly colored, beautiful Boletus, but it is not common. The stem sometimes fades with age, and both it and the tubes are apt to lose their color in drying. Peck, Boleti of the U.S.
I have not recognized it. CAUTION.
B. Sullivan´tii B. and M. Pileus hemispherical, glabrous, reddish-tawny or brown, brownish when dry, cracked in squares. Tubes free, convex, medium size, angular, longer toward the margin, their mouths reddish. Stem solid, violaceous at the thickened base, red-reticulated at the apex, expanded into the pileus. Spores pallid ochraceous, oblong-fusiform, 10–20µ long.
Pileus 3–4 in. broad. Stem 1.5–3 in. long.
Compact soil. Ohio. Sullivant.
The species is said to be intermediate between Boletus scaber and B. edulis. From the former it differs in its reticulated stem, from the latter, in its larger tubes and from both in its stratum of tubes being remote from the stem. I have not seen it. Peck, Boleti of the U.S.