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Page number:214 
Description type:Non-original description 
Description:Hypochnicium versatum (Burt) Ginns, comb. nov.
Basionym: Peniophora versata Burt, Ann. Missouri Bot. Gard. 12: 305, 1925.
Synonym: Corticium versatum (Burt) Rogers & Jackson, Farlowia 1: 326, 1943.
Citation of type: Washington: 'Edmonds, C.J. Humphrey, 7623, type', fide Burt.
Basidiomes effuse, up to 50 x 15 mm and up to 250 µm thick; margin indistinct, determinate, about 0.5 mm wide; hymenial surface smooth, dull, pale yellow (near 2.5Y8/4); subiculum thin, white, fibrous when wetted.
Hyphal system monomitic; subicular hyphae closely packed, woven, 2.5-3.0 (-5.0) µm diam, with clamp connections, the walls thickened, gelatinized, hyaline, nonamyloid, acyanophilous; subhymenium occupying most of the thickness of the basidiome, with hyphae vertically oriented and similar to subicular hyphae; gloeocystidia (Fig. 22) numerous, imbedded or some projecting to 10 µm, clavate to broadly clavate, 35-100 x 8-15 µm, the contents granular, pale yellow in KOH, sulfo-positive, the walls hyaline, smooth, thin or, in a few, thickened to 1.5 µm lamprocystidia lacking; basidia (Fig. 21) slenderly clavate, about 40 x 6.0-6.5 µm, with four sterigma each 4 µm long; basidiospores (Fig. 20) broadly ellipsoid, (6.5-) 6.8-8.2 (-8.4) x 4.0-4.8 µm, the walls hyaline, most thickened to 0.4 µm, most finely roughened with warts to 0.2 µm diam, nonamyloid, acyanophilous, with a blunt apiculum.
The above description was taken from the holotype. The sulfopositive gloeocystidia, the finely waited, slightly thick-walled basidiospores, and the thick-walled, gelatinized, narrow hyphae are the principal features of this fungus. These features exclude it from the genera Corticium and Peniophora, where it has been previously placed. Hypochnicium analogum (Bourd. & Galzin) Eriksson with its thick-walled, ornamented basidiospores and sufo-positive gloeocystidia is similar, hence the transfer to Hypochnicium is proposed.
Burt (1925: 305) cited two collections, the holotype (7623) and Humphrey 6285. They are specimens of the same species. Both are on conifer lumber that shows little sign of decay. The report (Conners 1967) from British Columbia was based on F9820 which is Gloeocystidiellum ochraceum.
Specimens examined: USA: Washington: Edmonds, 25 Sept. 1910, underside of old (conifer) plank, C.J. Humphrey 7623 (FH Burt Herb.); Chehalis, 15 Oct. 1909, underside of slightly decayed red fir tie, CJH 6285 (FH Burt Herb.). Canada: British Columbia: Saanichton, 26 Nov. 1939, on bark of dead sapling of Pseudotsuga menziesii, J.E. Bier (DAOM F9820).
 
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