COMMON NAME: Two-colored Bolete, Red-and-Yellow Bolete.

CAP: (5-15.5 cm) wide, convex, becoming Hat or irregular; surface dry, finely velvety when young, sometimes finely cracked in age, dark red, red, rose-red, purple-red, or pink when fresh, turning yellow in age; flesh pale yellow, slowly staining blue when bruised or cut; odor and taste not distinctive.

PORE SURFACE: yellow when fresh, dingy yellow or olive-tinged in age, staining greenish blue (sometimes weakly), when bruised; pores angular, 1-2 per mm.

STALK: (5-10 cm) long, (1-3 cm) thick, nearly equal or club-shaped, solid, yellow at the apex, red or rosy-red on the lower two-thirds or more, unchanging or slowly staining blue when bruised or cut; partial veil and ring absent.

SPORE PRINT: olive-brown.

MICROSCOPIC FEATURES: spores 8-12 x 3.5-5 μm, oblong to slightly ventricose, smooth, pale brown.

FRUITING: solitary or in groups on the ground under oaks; July-October; fairly common.

EDIBILITY: edible, choice.

COMMENTS: Boletus sensibilis (poisonous) has a dark to pale brick-red cap that fades to dull rose or dingy cinnamon in age, a predominantly yellow stalk lightly flushed with red, pale yellow flesh and a yellow pore surface, both of which stain blue quickly

From Mushrooms of Northeastern North America Alan E. Bessette, Arleen R. Bessette, & David W. Fischer  Copright © 1997 Syracuse University, ISBN 0-8156-0388-6