Leifiporia rhizomorpha

Leifiporia rhizomorpha Y.C. Dai, F. Wu & C.L. Zhao 2016, in Zhao et al., Mycological Progress, 15, 799-809 (2016)

Etymology: Rhizomorpha (Lat.): referring to the species bearing a rhizomorphic margin.

Diagnosis: Fruiting body. Basidiocarps annual, resupinate, soft, without odor or taste when fresh, brittle when dry, up to 20 cm long, 4 cm wide, 1.5 mm thick at center (measured in two hitherto available specimens). Pore surface white to cream when fresh, cream when dry; pores angular, 3–4 per mm; dissepiments thin, entire to slightly lacerate. Sterile margin distinctly rhizomorphic, white, up to 4 mm wide. Subiculum white, soft corky, up to 0.2 mm thick. Tubes concolorous with pore surface, brittle, up to 1.3 mm long. Hyphal structure. Hyphal system dimitic; generative hyphae hyaline, thin-walled, bearing clamp connections; skeletal hyphae present in the subiculum only, IKI–, CB–; tissues unchanged in KOH. Subiculum. Generative hyphae dominant, hyaline, thin-walled, frequently branched at right angles, interwoven, 2.5–4 μm in diameter; skeletal hyphae infrequent, hyaline, thick-walled with a narrow lumen or subsolid, occasionally branched, interwoven, distinctly thinner than generative hyphae, 1.5– 2.5 μm in diameter. Tubes. Generative hyphae hyaline, thin-walled, frequently branched at right angle, interwoven, 2–3.5 μm in diameter. Cystidia absent, but fusoid cystidioles occasionally present, hyaline, thin-walled, 11–13 × 5–6 μm; basidia barrel-shaped to pyriform, with four sterigmata and a basal clamp connection, 14–17 × 5.5–8 μm; basidioles dominant, in shape similar to basidia, but slightly smaller. Spores. Basidiospores mostly ellipsoid, hyaline, thin-walled, smooth, usually bearing one or two guttules, IKI–, CB–, (4.5–)5–6(−6 .5) × 2– 3 μm, L = 5.68 μm, W= 2.51 μm, Q = 2.15–2.38 (n = 60/2).

Index Fungorum Number: IF817363