CAP 5-20 cm in diam., circular to kidneylike, convex becoming plane or centrally depressed, blue to blue-gray or blue-green; developing ochraceous, salmon, or rusty stains in age, becoming salmon pink to brick red on drying; glabrous to minutely tomentose. Margin at first enrolled, often lobed or wavy; concolorous or paler. PORE SURFACE white, developing salmon or ochraceous stains in age. PORES circular to angular, 1-4 per mm. TUBES 1-7 mm long, decurrent. STEM 5-15 cm long, 1.5-4 cm thick, solid, central to lateral, simple or branching at base, concolorous with cap. HYPHAL STRUCTURE monomitic. CLAMP CONNECTIONS present. SPORES ellipsoid to ovoid, 3.5-4 × 2.5-3 µm, thin walled, smooth, weakly amyloid.
M. Castellano, E. Cazares, B. Fondrick, T. Dreisbach, Handbook to additional fungal species of special concern in the Northwest Forest Plan, USDA Forest Service Pacific Northwest Research Station, General Technical Report PNW-GTR-572 (2003)