California Satan's Bolete

Rubroboletus eastwoodiae, sometimes called satan's bolete, is a possibly toxic basidiomycete fungus of the bolete family.

The cap is 6–25 centimetres (2+1⁄2–10 in) wide, convex, olive-colored, pinkish in age, dry, has margin that curves inward then expands, and yellowish flesh. The stalk is 7–15 cm (3–6 in) tall and 3–6 cm (1+1⁄4–2+1⁄4 in) wide. The flesh turns blue when cut. The spores are olive-brown, elliptical, and smooth. The spore print is olive brown.