Summary:
Features include 1) a somewhat semicircular bracket with something of a lateral stem, 2) a cap surface that is brownish purple to brown, fleshy when fresh, becoming densely hairy, wavy, and lumpy, near the margin yellow-brown and bald, as viewed from above with fan-shaped sectors and a black fringe, 3) flesh that is pallid to brown, with zones or patches of hard, woody flesh and soft, woolly flesh, with fine dark brown line in cross-section delimiting hard zones, 4) teeth gradually narrowing to an acute tip, white drying gray, and stained red-brown where bruised, 5) spores that are broadly elliptic, verrucose, and amyloid, 6) sulfo-positive gloeocystidia originating in spine trama parallel with the other hyphae but bending almost at a right angle to project into and slightly through the hymenium, and 7) a dimitic hyphal system with clamp connections.

Microscopic:
SPORES (5.5)6-7(7.5) x (4)5(5.5) microns, broadly elliptic, minutely warted (verrucose), amyloid, colorless, acyanophilic, walls thin to 0.5 microns thick, with a minute apiculus; BASIDIA 4-spored, 24-28 x 5-6.5 microns, cylindric-clavate, when mature projecting 10-15 microns, sterigmata about 3 microns long; GLOEOCYSTIDIA originating in the spine trama and 3-4 microns wide, "extending parallel to the other hyphae for up to several hundred microns then abruptly bending, almost at a right angle, to project into and slightly through the hymenium, the apical portion extending into the hymenium about 45 microns long, ellipsoid to fusoid with a bluntly conic apex", 8-12 microns wide, wall colorless, thin, smooth, contents black in sulfobenzaldehyde; HYPHAE dimitic inamyloid, acyanophilic; strigose cap composed of fascicles of generative hyphae, 3-4 microns wide, "parallel, straight, infrequently branched", with clamp connections and a few simple septa, walls slightly thickened, nearly colorless, and rather common sulfocystidia 3-4 microns wide "with the apical 10-20 microns typically inflated to 5 microns"; CONTEXT HYPHAE in the woolly zones forming numerous woven strands, 6-40 microns wide, "composed of a mixture of parallel, essentially straight generative and skeletal hyphae": 1) generative hyphae 3-4 microns wide with clamp connections, infrequently branched, colorless, walls thin to moderately thickened, 2) skeletal hyphae 3-4 microns wide, "aseptate, rarely branched, the walls pale yellow, slightly refractive, thickened so that some have only a capillary lumen", hyphae between the strands loosely woven; context hyphae in hard zones delimited by a dark line are like those in the strands, but 3-5 microns wide, closely packed, and not arranged into strands; hyphae in the teeth "parallel, longitudinally arranged, compact, essentially straight": 1) skeletal hyphae predominating, infrequently branched, some weakly knobby, 2.5-4 microns wide, the walls thickened, pale yellow, slightly refractive, 2) generative hyphae 2-3.5(4) microns wide, colorless, with clamp connections, walls thin to slightly thickened, (Ginns(14))

Notes:
Gloiodon occidentale is known from the type specimen found in BC, (Ginns(5)), and a specimen found in WA (illustrated here, Buck McAdoo pers. comm.)

Synonyms and Alternate Names:
Diplomitoporus lindbladii (Berk.) Gilb. & Ryvarden
Poria subavellanea Murrill