Pileus 1.5–3 in. broad. Stem 1–2.5 in. long, 3–5 lines thick.
Woods and open places. Rather common and wide spread. Peck, Boleti of the U.S.
Boletus castaneus is one of the neatest looking of fungi. The prevailing color is cinnamon, that of the tubes white or very light yellow, spotted with brown wherever insects have touched them. The pore surface of mature specimens is usually irregular. Whoever has seen the stalagmites of Luray Cave will recognize their color on the stems of B. castaneus. These are brittle, snapping like pipe stems, with a small tube in center.
The fungus is common from June until September. It is gregarious, occasionally three or four individuals form a group. Either raw or cooked the caps are edible and will become favorites.
B. Mur´rayi B. and C. Pileus hemispherical, granulated, vivid red. Flesh yellow. Tubes decurrent, about 1 line deep, yellow. Stem clavate, even, pale-yellow. Spores pale-yellow.
Pileus 2–3 in. broad, nearly 1.5 thick.
New England, Murray.
On account of the color of the spores this species has been placed with the Cariosi. The description does not mention the character of the interior of the stem, and the decurrent tubes depart from the character of the typical species so that its true position is uncertain. The species seems well marked by the character of the pileus. Peck, Boleti of the U.S.
B. isabelli´nus Pk. Pileus convex, firm, minutely tomentose, whitish, becoming darker and smoother with age. Flesh isabelline. Tubes adnate, minute, sometimes larger near the stem, nearly round, whitish. Stem nearly equal, subglabrous, hollow, whitish. Spores subelliptical, 7.5–9×5–6µ. Pileus 2–3 in. broad. Stem 1–2 in. long, 4–6 lines thick.
Woods. Ocean Springs, Miss. June. Underwood.