Habitat/range: On the ground. Widely scattered in BC from Haida Gwaii and Hazelton/Smithers area south to Glacier National Park and Manning Park to southern Vancouver Island. Elsewhere in western North America, known from AK to NM.Basidiomata stipitate; stipe 6–10 cm long, 2–3 cm thick, solid, smooth, white; pileus 5–10 (–26) cm broad, circular, or frequently irregular in outline; pileus surface pale blue, greenish blue, fading to pale orange with blue tints, smooth, glabrous or suede-like; context white, fleshy, tough to brittle, over 2 mm thick; tubes 2–7 mm deep, decurrent; pore surface white, becoming apricot to salmon; pores 1–4 per millimetre, angular or round.
Hyphae 4–15 μm diameter with clamp connections; basidiospores 4–5 × 2.8–3.6 μm, broadly ellipsoid, walls weakly to obviously amyloid.
Notes: Reported to be ectomycorrhizal (Kroeger et al. 2012). The blue tints of the pileus fade, apparently on exposure to sunlight and (or) in aging. Al- though similar in habitat, size, and general appearance, A. ovinus has a white or ivory to grey pileus, lacking blue tints. Albatrellus confluens has a pinkish buff pileus that lacks blue tints (see comparison under A. confluens).
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)