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Page number:363 
Remarks (public):The white, rhizomorphic margin of J. fimbriatella basidiocarps is a conspicuous field character. The relatively huge skeletocystidia stand out microscopically. This is a distinctive, but evidently rare fungus. 
Description type:Non-original description 
Description:Junghuhnia fimbriatella (Pk.) Ryv. - Persoonia 7:18, 1972. - Polyporus fimbriatellus Pk.. N.Y. State Mus. Rept. 38:91. 1885. Basidiocarps annual, resupinate, effused to 10 cm, soft, easily separated; pore surface cream to pale buff, the pores angular, 3-5 per mm. with thin dissepiments that become deeply lacerate. margin white to cream coloured, conspicuously fimbriate and rhizomorphic. the rhizomorphs white; subiculum less than 1 mm thick, cream coloured, soft-fibrous; tube layer concolorous and continuous with the subiculum, up to 2 mm thick.
Hyphal system dimitic; subicular generative hyphae thin-walled, with clamps, rarely branched. 3-5.5 µm in diam; subicular skeletal hyphae thick-walled, hyaline, nonseptate, rarely branched. 3-5 µm in diam; tramal hyphae similar.
Cystidia abundant, thick-walled, almost completely to apically encrusted, clavate. 60-100 x 6-9 µm, originating in subhymenium as ends of tramal skeletal hyphae, some with encrusted ends up to 17 µm in diam.
Basidia clavate, 4-sterigmate, 12-20 x 4-5 µm. with a basal clamp.
Basidiospores oblong to ovoid, hyaline, smooth. negative in Melzer's reagent, 3-3.5 x 1.5-' µm.
Type of rot. White rot of dead hardwoods.
Cultural characteristics. Unknown.
Sexuality. Unknown.
Substrata. Dead wood of hardwoods and also on old polypores, in Europe known from Fagus and Fraxinus and also collected on old basidiocarps of Ganoderma applanatum (Grosse-Brauckmann & Nuss 1991), in North America particularly on Populus. Distribution. A very rare species in Europe. known only from a few localities in Yugoslavia, Germany, Switzerland. Austria, Poland, and Czechoslovakia (see GrosseBrauckmann & Nuss 1991). Also known from East Russia (Kamtschaka), the northeastern and northwestern United States, and western Canada.
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