Phylloporia lespedezae G.J. Ren & F. Wu, 2017

Ren, Guang-Juan & Wu, Fang, 2017, Phylloporia lespedezae sp. nov. (Hymenochaetaceae, Basidiomycota) from China, Phytotaxa 299 (2), pp. 243-251 : 244-246

Phylloporia lespedezae G.J. Ren & F. Wu , sp. nov. ( Figs. 2 , 3 )

MycoBankno.: MB 819392

Diagnosis. —The species is distinct by annual, pileate basidiocarps with wavy edge, circular pores (8–9 per mm), a monomitic hyphal system, thin- to thick-walled hyphae present in tramal, broadly ellipsoid basidiospores (3.1–3.7 × 2.2–2.7 μm), and grows on Lespedeza ( Fabaceae ) only.

Type. — CHINA. Shanxi Province, Huguan County, Baquanxia National Park, on base of living Lespedeza bicolor , 27 Aug 2016, Dai 17067 (holotype, BJFC022522).

Etymology.— Lespedezae (Lat.) : referring to the host tree genus Lespedeza ( Fabaceae ).

Fruiting body.— Basidiocarps annual, pileate, sessile, corky and without odour or taste when fresh, become hard corky and light in weight when dry. Pilei projecting up to 1.8 cm, 2 cm wide and 2 mm thick at base. Pileal surface brown to yellowish brown from the base to the margin, concentrically zonate and sulcate with narrow zones, tomentose; margin wavy, sterile, yellowish. Pore surface olivaceous buff to clay-buff, slightly glancing; pores circular, 8–9 per mm; dissepiments thin, entire. Tubes slightly paler than context, up to 1 mm long. Context cinnamon-buff to honeyyellow, up to 1 mm thick, azonate, duplex, a black line present in the context to separate the upper tomentum of the lower compacted layer, upper layer context soft corky, lower layer hard corky.

Hyphal structure.— Hyphal system monomitic; generative hyphae simple septate; tissues darkening but otherwise unchanged in KOH.

Context. —Hyphae in the lower context golden yellow, thin- to thick-walled, frequently simple septate, occasionally branched, interwoven or subparallel, 2–3 μm diam; hyphae in the upper tomentum golden yellow, thick-walled, unbranched, occasionally simple septate, loosely interwoven, 3–5 μm diam.

Tubes. —Tramal hyphae thin- to thick-walled, thin-walled hyphae hyaline to pale yellowish, occasionally branched and simple septate, 2–2.5 μm diam, thick-walled hyphae golden yellow, frequently simple septate, occasionally branched, loosely interwoven or subparallel along the tubes, 2.5–3 μm diam. Setae absent; cystidia absent, fusoid cystidioles occasionally present, 13–16 × 3–5 μm; basidia broadly clavate, with four sterigmata and a simple septum at the base, 13–14 × 4–5 μm; basidioles in shape similar to basidia, but slightly smaller.

Spores.—Basidiospores broadly ellipsoid, yellowish, thick-walled, smooth, IKI–, CB–, (3–)3.1–3.7(–3.8) × (2.0–)2.2–2.7(–2.8) μm, L = 3.28 μm, W = 2.34 μm, Q = 1.33–1.45 (n = 180/6).

Additional specimens examined. — CHINA. Shanxi Province, Huguan County, Baquanxia National Park, on base of living Lespedeza bicolor ( Fabaceae ), 27 Aug 2016, Dai 17065 (BJFC022521), Dai 17069 (BJFC022523), Dai 17072 (BJFC022524), Dai 17074 (BJFC022525), Dai 17076 (BJFC022526).

Figures

FIGURE 2. Basidiocarps of Phylloporia lespedezae (Holotype). Scale bars: a= 1 cm; b = 1 cm.

FIGURE 3. Microscopic structures of Phylloporia lespedezae (Dai 17065). a. Basidiospores; b. Basidia and basidioles; c. Cystidioles; d. Hyphae from tube trama; e. Hyphae from upper tomentum. f. Hyphae from lower context.