Tropicoporus boehmeriae L.W. Zhou & F. Wu, 2015

Wu, Fang, Qin, Wen-Min, Euatrakool, Oratai & Zhou, Li-Wei, 2015, Tropicoporus boehmeriae sp. nov. (Hymenochaetaceae, Basidiomycota) from Thailand, a new member of the Inonotus linteus complex, Phytotaxa 231 (1), pp. 73-80 : 75-77

Tropicoporus boehmeriae L.W. Zhou & F. Wu , sp. nov. Figs. 2, 3

MycoBank MB 813013

Etymology:— boehmeriae (Lat.) : referring to the host genus Boehmeria .

Type:— THAILAND, Chiang Mai, Sri Lanna National Park, on living tree of Boehmeria nivea , 29 July 2014, LWZ 20140729-10 (Holotype in IFP, isotype in BJFC).

Fruiting body:—Basidiocarps annual, resupinate, inseparable, without odor or taste and woody hard when fresh, woody hard and light in weight when dry, up to 17 cm long, 7 cm wide and 6 mm thick. Pore surface pinkish buff to honey-yellow, glancing; sterile margin distinct, buff to cinnamon-buff, up to 3 mm; pores angular, 7–9 per mm; dissepiments thin, entire. Subiculum corky, cinnamon-buff yellow, up to 0.5 mm. Tubes honey-yellow, hard corky, up to 5.5 mm long.

Hyphal structure:—Hyphal system dimitic; generative hyphae simple septate; tissue darkening in KOH, and hyphae becoming swollen in KOH.

Subiculum: —Generative hyphae hyaline to pale yellowish, thin- to slightly thick-walled, frequently septate, rarely branched, more or less flexuous, 2–3.5 μm in diam.; skeletal hyphae yellow, thick-walled with a wide to narrow lumen, unbranched, aseptate, more or less flexuous, interwoven, 2–4 μm in diam.

Tubes:— Generative hyphae pale yellowish, slightly thick-walled, occasionally branched, frequently septate, 1.5– 3 μm in diam.; skeletal hyphae yellowish, thick-walled with a wide to narrow lumen, unbranched, aseptate, subparallel along the tubes, 2.5–3.5 μm in diam. Hymenial setae ventricose to subulate, dark brown, thick-walled, 13–25 × 5–9 μm. Cystidia and cystidioles absent. Basidia barrel-shaped, 5–8 × 3–5 μm, with four sterigmata and a simple septum at the base; basidioles in shape similar to basidia, but slightly smaller. Rhomboid crystals present among hymenia and trama.

Basidiospores:— Subglobose, slightly thick-walled, pale yellowish, smooth, IKI–, CB–, sometimes glued together in tetrads, (2–)2.2–2.9(–3) × 2–2.5(–2.7) μm, L = 2.58 μm, W = 2.23 μm, Q = 1.13–1.18 (n = 60/2).

Additional specimen (Paratype):— THAILAND. Chiang Mai, Sri Lanna National Park, on living tree of Boehmeria nivea , 29 July 2014, LWZ 20140729-13 (IFP).

Figures

FIGURE 3. Microscopic structures of Tropicoporus boehmeriae (holotype). a: Basidiospores. b: Basidia and basidioles. c: Hymenial setae. d: Hyphae from trama. e: Hyphae from subiculum.