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.
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.)
Fruiting body:
dimidiate [somewhat semicircular], laterally substipitate [with something of a lateral stem], 4.5-8cm x 4-7cm, 1-1.5cm thick; cap surface "when fresh, brownish purple to brown and quite fleshy, drying pale brown", "densely strigose, undulating and lumpy", near the margin yellow-brown, bald "and, as viewed from above, tending to divide into fan-shaped sectors" with the extreme margin of black, fimbriate [fringed], horny, split tongues 0.1-0.2cm broad; context [flesh] in vertical section pallid but brown near the base, up to 1cm thick, "when fresh soft and woody, when dry hard and woody, homogeneous near the margin, elsewhere of alternating zones or patches of hard, woody tissue which is delimited by a thin dark brown line and soft, woolly tissue", [the illustrated vertical cross-section shows from to top to bottom a) coarsely hairy zone, b) thin black line, c) pallid context, and d) spines]; spines acicular, 0.5-1.2cm long and 0.03cm wide, "gradually narrowing to an acute tip, when fresh white, drying lead gray" or dark gray "and stained red-brown where bruised, when fresh fleshy, drying hard and brittle", (Ginns(14))
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))
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