Fomitiporia rhamnoides T.Z. Liu & F. Wu

Liu, Tie-Zhi, Chen, Qian, Han, Mei-Ling & Wu, Fang, 2018, Fomitiporiarhamnoides sp. nov. (Hymenochaetales, Basidiomycota), a new polypore growing on Hippophae from China, MycoKeys 36, pp. 35-43 : 35

Fomitiporia rhamnoides T.Z. Liu & F. Wu sp. nov. Figs 2, 3

Holotype.

CHINA. Hebei Province, Zuolu County, Xiaowutai Nature Reserve, Shanjiankou, on living tree of Hippophae rhamnoides , 10.IX.2017, Dai 18091 (BJFC025621).

Etymology.

Rhamnoides (Lat.) refers to the species growing on Hippophae rhamnoides .

Basidiomata perennial, pileate, solitary or a few imbricated, hard corky and without odour or taste when fresh, woody hard and medium in weight when dry; pilei dimidiate to ungulate, triquetrous in section, projecting up to 5 cm, 7 cm wide and 2.5 cm thick at base; pileal surface yellowish-brown, greyish-brown to dark brown, concentrically sulcate, at first velutinate, becoming glabrous and slightly cracked with age; margin obtuse. Poroid surface clay-buff to yellowish-brown when fresh, becoming orange brown to snuff brown when dry, shining; sterile margin yellowish-brown, up to 3 mm wide; pores circular, 11-13 per mm, dissepiments entire. Context yellowish-brown, zonate, woody hard, up to 1.5 cm thick; tubes greyish-brown, paler than context, hard corky to brittle, up to 1 cm long, annual layers indistinct.

Hyphal structure.

Hyphal system dimitic; generative hyphae simple septate; tissue darkening but otherwise unchanged in KOH.

Context.

Generative hyphae hyaline to pale yellow, thin- to slightly thick-walled, occasionally branched, frequently septate, 3-4 µm in diam., skeletal hyphae yellowish-brown, thick-walled with a wide lumen, unbranched, occasionally septate, straight, regularly arranged, 4.5-6 µm in diam.

Trama of the tubes.

Generative hyphae hyaline to pale yellowish, thin-walled, occasionally branched, frequently septate, 2-3 µm in diam., skeletal hyphae dominant, yellowish-brown, thick-walled with a wide lumen, unbranched, occasionally septate, straight, parallel along the tubes, 2.5-4 µm in diam. Setae absent; cystidioles present, more or less ventricose, hyaline, thin-walled, 12-20 × 3-6 μm; basidia subglobose to barrel-shaped, with four sterigmata and a simple septum at the base, 8-16 × 6-10 µm; basidioles dominant in hymenium, in shape similar to basidia, but slightly smaller; big rhomboid crystals present amongst hymenium.

Spores.

Basidiospores globose, hyaline, thick-walled, smooth, dextrinoid in Melzer’s reagent, strongly CB+, (5.2 –)5.8–7(– 7.3) × (5 –)5.5–6.5(– 6.8) µm, L = 6.47 µm, W = 6.06 µm, Q = 1.06-1.08 (n=60/2).

Additional specimens (paratypes) examined.

CHINA. Hebei Province, Zuolu County, Xiaowutai Nature Reserve, Shanjiankou, on living tree of Hippophae rhamnoides , 10.IX.2017, Dai 18087 (BJFC025617), Dai 18088 (BJFC025618), Dai 18090 (BJFC025620), Dai 18100 (BJFC025630), Dai 18101 (BJFC25631). Shanxi Province, Zuoyun County, Santun, on living tree of Hippophae rhamnoides , 19.V.2017, Dai 17368 (BJFC024903), Dai 17369 (BJFC024904), Dai 17370 (BJFC024905).

Type of rot.

Causing a white rot.