COMMON NAME: Powdery Sulfur Bolete.

CAP: (1-10 cm) wide, bluntly rounded to convex, becoming nearly flat in age; surface dry and powdery at first, then coated with tiny, matted fibers and scales, often slightly wrinkled or finely cracked in age, bright sulfur-yellow, becoming orange-red to brownish red from the center toward the margin; margin incurved when young, typically rimmed with pieces of torn partial veil; flesh white to pale yellow, slowly staining pale blue, then dingy yellow to pale brown when cut; odor and taste not distinctive.

PORE SURFACE: bright yellow, becoming dingy yellow to grayish brown at maturity, staining greenish blue, then grayish brown when bruised; pores angular to nearly circular, 1-3 per mm.

STALK: (4-14.5 cm) long, (6-16 mm) thick, equal or enlarging downward, solid, sheathed from the base upward with tiny, matted fibers, bright sulfur-yellow, bright yellow and smooth above the ring; partial veil membranous to powdery, bright sulfur-yellow, typically leaving a prominent, but sometimes inconspicuous, superior ring.

SPORE PRINT: olive-gray to olive-brown.

MICROSCOPIC FEATURES: spores 8-10.5 x 4-5 μm, elliptic to oval, smooth, pale brown.

FRUITING: solitary, scattered, or in groups on the ground in woods; July-October; occasional.

EDIBILITY: edible.

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