taxonID	type	description	language	source
2D1D87BFFFE554627FF9F884FE47FE1E.taxon	diagnosis	Diagnosis. — It differs from other Onnia species by its wide basidiospores (> 4 μm in width, <4 μm in other species). Type. — Vietnam, Lam Dong Province, Bidoup Nui Ba National Park, alt. 1700 m, on root of living Pinus kesiya, 16 Oct. 2017, Y. C. Dai 18415 (holotype in BJFC). Etymology. — Kesiya (Lat.): referring to the host Pinus kesiya. Basidiocarps. — Basidiocarps annual, laterally stipitate, solitary, corky to leathery without odour when fresh, hard corky upon drying. Pilei dimidiate to fan-shaped, projecting up to 8 cm long, 4 cm wide and 9 mm thick at base. Pileal surface cinnamon-buff to olivaceous, buff or reddish brown at margin, distinctly concentrically zonate, cinnamon-buff when dry, distinctly velutinate, concentrically zonate; margin sharp, curved down when dry. Pore surface grayish white when fresh, grayish white to grayish brown when dry; pores mostly angular, irregular with age, 1 – 3 per mm; dissepiments thin, slightly lacerate. Context duplex, upper layer cinnamon-buff, spongy, up to 2 mm thick, lower layer honey-yellow, hard corky, up to 4 mm thick, a demarcation zone between the two layers indistinct. Tubes pinkish buff, paler than context, hard corky to brittle, up to 3 mm long. Stipe very long, up to 5 cm and 5 mm in diam, distinctly tomentose. Hyphal structure. — Hyphal system monomitic, generative hyphae simple septate, IKI-, CB-; tissue darkening but otherwise unchanged in KOH. Context. — Hyphae in upper layer pale yellowish to golden yellow, thin-walled, rarely branched with frequent simple septa, loosely interwoven, 4 – 7 μm in diam; hyphae in the lower layer yellowish to golden brown, thin- to slightly thick-walled, occasionally branched with frequent simple septa, regularly arranged, more or less agglutinated, 4 – 6 μm in diam; hyphae in stipe similar to those in context. Tubes. — Tramal hyphae hyaline to yellowish, thin- to slightly thick-walled, occasionally branched and frequently septate, loosely interwoven, slightly agglutinated, 2.5 – 3.5 μm in diam. Hymenial setae hooked, sharp-pointed, dark brown, thick-walled, very deep-rooting, 50 – 130 × 10 – 20 μm; cystidia and cystidioles absent; basidia clavate, with four sterigmata and a simple septum at the base, 12 – 23 × 4 – 6 μm; basidioles dominant, in shape similar to basidia, but distinctly smaller. Spores. — Basidiospores ellipsoid, hyaline, thin-walled, smooth, some with a big guttule, IKI-, CB-, (5.3 –) 5.8 – 6.5 (– 7) × 4 – 4.7 (– 5) μm, L = 6.11 μm, W = 4.37 μm, Q = 1.4 (n = 30 / 1). Type of rot. — White rot.	en	Zhou, Meng, Wu, Fang (2018): A new species of Onnia (Hymenochaetales, Basidiomycota) from Vietnam. Phytotaxa 349 (1): 73-78, DOI: 10.11646/phytotaxa.349.1.9, URL: http://dx.doi.org/10.11646/phytotaxa.349.1.9
