Search on : Taxa descriptions


Page number:28 
Remarks (internal):Specimens of Conferticium ochraceum and C. ravum are very similar. In both the thickened subhymenium is agglutinated and appears pseudoparenchymatous. The major difference is the spore ornamentation; the spore wall is minutely verrucose in C. ravum and smooth in C. ochraceum.
Hjorstam and Ryvarden (1988) observed that C. insidiosum (Bourdot & Galzin) Hallenb., the type species of the genus, is morphologically inseparable from C. ochraceum, and they designated a lectotype for C. insidiosum.
In some specimens thick sections showed the hymenial layer to be weakly dextrinoid and the basal hyphal layer weakly amyloid. As in C. ravum, we did not detect any cyanophily in the hyphal walls of collections from North America, but in a European collection (Norway, Hjortstam 9729, BPI 285930) the hyphae were clearly cyanophilous, the basal hyphal layer was weakly amyloid and the hymenium weakly dextrinoid in thick sections.
The two collections from Washington have larger and somewhat differently shaped spores than the other collections examined and those described and illistrated by Eriksson and Ryvarden (1975).
Description type:Non-original description 
Description:Conferticium ochraceum (Fr.) Hallenb. Fig. 5 Mycotaxon 11: 448, 1980.
? Thelephora ochracea Fr., Syst. Mycol. 1: 446, 1821.
? Corticium ochraceum (Fr.) Fr., Epicrisis, p. 563, 1838.
? Gloeocystidium ochraceum (Fr.) Litsch. in Bourdot and Galzin, Hym. France, 266, 1928, illegitimate, a later homonym of G. ochraceum Bres. 1911.
? Gloeocystidium friesii Lundell in Lundell and Nannfeldt, Fungi Exs. Suec. No. 1851, 1950, proposed as a nom. nov. because the species epithet ochraceum was occupied in Gloeocystidium by G. ochraceum Bres. 1911.
? Gloeocystidiellum ochraceum (Fr.) Donk, Fungus 26: 9, 1956.
Type specimen examined Thelephora ochracea as Gloeocystidiellum friesii, Sweden: Upland: Upsala, on the shore of Lake Mälaren, 13.x.1947, J. Eriksson 2317, Fungi Exs. Suec.. 1851 (isoneotype S). Hjortstam (1987b: 59) selected as neotype a part of 2317 deposited at UPS but we have not examined it.
Basidiomes effuse, 4 x 3 cm but often confluent, up to 670 µm thick, typically stratose; margin abrupt to slightly pruinose, concolorous, hymenial surface smooth, ceraceous, pale yellow with a pink tint, "Ivory Yellow", "Cream-Buff", "Light Ochraceous-Buff', "Ochraceous-Buff', not cracked in young specimens, becoming strongly areolate in old basidiomes, cracks extending to substrate.
Hyphal system monomitic. Subiculum weakly amyloid in some collections. Hyphae 2.0-4.0 µm diam, lacking clamp connections, compact, indistinct, pseudoparenchymatous, typically stratose, encrusted with scattered crystals near substrate, the walls thin to 1.2 µm thick, acyanophilous. Hymenium and subhymenium weakly dextrinoid in some collections. Gloeocystidia 35-120 x 4-8 µm, numerous to rare, cylindric to clavate, contents hyaline to yellowish in KOH, granular, sulfo-negative. Basidia 17.5-28.0 x 4.0-5.0 µm, clavate to cylindric, with four sterigmata, each 4-5 µm long. Basidiospores 3.5-5.5 x 2.0-3.0 µm, ellipsoid, adaxially slightly concave, the walls thin, smooth, amyloid, acyanophilous, with a small, rounded, indistinct apiculus.
Ecology and distribution Scattered across North America but most collections from northern United States and Canada. Fruiting on bark of dead saplings, and underside of fallen, rotted limbs of conifers and angiosperms in a variety of genera.
Taxon name: