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Description type:Non-original description 
Description:Fruitbody. - Basidiocarps biennial, effused-reflexed, sometimes imbricate, without odour or taste and corky when fresh, hard corky and light-weight when dry. Pilei projecting up to 1 cm, 6 cm wide and 8 mm thick at based. Pileal surface brown to dark grey, concentrically sulcate with narrow zones, tomentose to velutinate or glabrous with age; margin acute. Poroid surface buff-brown when fresh, dark brick when dry, more or less glancing, margin narrow, less than 1 mm wide; pores angular to circular, 3-4 per mm; dissepiments thin, in decurrent parts of basidiocarp oblique and lacerate. Context brown to dull brown, hard corky to woody, ca. 1 mm thick, duplex, two layers separated by a thin black line. Tubes dark brown, up to 7 mm long, tube layers indistinct.
Hyphal structure. - Hyphal system dimitic; generative hyphae simple septate; tissue darkening but otherwise unchanged in KOH.
Context. - Generative hyphae hyaline to pale yellowish, thin- to fairly thick-walled, frequently branched and septate, 2-3.2 µm in diam; skeletal hyphae dominant, golden yellow, distinctly thick-walled with a wide lumen, unbranched, rarely septate, more or less straight, loosely interwoven, 3-5 µm in diam; hyphae in the dark zone dark brown, distinctly thick-walled, strongly agglutinated and interwoven.
Tubes. - Generative hyphae frequent, hyaline to yellowish, thin- to fairly thick-walled, occasionally branched and septate, 2-3.5 µm in diam; skeletal hyphae golden yellow, distinctly thick-walled, unbranched, rarely septate, straight, parallel along the tubes, 2.7-4.5 µm in diam. Setae absent; basidia clavate, with four sterigmata and a simple septum at the base, 11-15 — 5-6 µm; basidioles in shape similar to basidia, but slightly smaller.
Spores. - Basidiospores broadly ellipsoid, fairly thick-walled, yellowish, IKI-, CB+, (4.2-)4.6-5.7(-6) — (3.5-)3.8-4.4(-4.8) µm, L = 5.19 µm, W = 3.99 µm, Q = 1.27-1.33 (n=90/3).
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