Boletus illudens (Peck)

CAP: (3-9 cm) wide, convex, becoming nearly plane, surface dry, somewhat velvety, pale brownish yellow when young, becoming yellow-brown to pinkish cinnamon, producing a fleeting brilliant green reaction with NH4OH, instantly staining dark brown with KOH, slowly staining bluish gray with FeSO4; flesh pale yellow, not blueing when cut, slowly staining bluish gray with FeSO4; odor and taste not distinctive.

PORE SURFACE: lemon-yellow, not blueing when bruised; pores angular, 1-2 mm wide or more on mature specimens.

STALK: (3-9 cm) long, (5-13 mm) thick, tapered downward, dry, yellow, typically marked with longitudinal rib-like lines that form a partial reticulum.

SPORE PRINT: olive to olive-brown.

MICROSCOPIC FEATURES: spores 10-14 x 4-5 μm, elliptic to nearly spindle-shaped, smooth, pale brown.

FRUITING: solitary, scattered, or in groups on the ground under oaks in oak or oak-pine 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