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Page number:311 
Remarks (public):This is an easy species to recognize in the field due to the black, glossy upper surface, the large hexagonal pores (the largest in any European species), the distribution and hosts. 
Description type:Non-original description 
Description:Hexagonia nitida Dur. & Mont. - Expl. Sci. Alger. Bot. 15, pl. 33. 1849.
Basidiocarps perennial, semicircular. applanate, often with a raised area at the base, sessile to dimidiate, up to 10 x 7 x 4 cm. woody; upper surface glabrous, glossy, black with a thin cuticle, sulcate, in old and dried specimens usually with some radial cracks. margin rounded and grey; pore surface umber brown, pores angular. 1-3 mm in diam; context umber brown, tough-fibrous, up to 5 mm thick at the base; tube layer brown, up to 3 cm thick.
Hyphal system trimitic; generative hyphae thin-walled, with clamps, hyaline. 2-5 µm in diam; skeletal hyphae abundant. thick-walled to solid, pale brown, nonseptate. 4-6 µm in diam; binding hyphae sinuous with short sidebranches, solid, golden brown, 2-5 µm in diam.
Cystidia and other sterile hymenial elements absent.
Basidia clavate. 4-sterigmate, 24-30 x 7-9 µm, with a basal clamp.
Basidiospores cylindric, thin-walled, hyaline, smooth. negative in Melzer's reagent, 11-15 x 3.5-5 µm.
Type of rot. Causes a white rot in dead Quercus sp.
Cultural characteristics. Unknown.
Sexuality. Unknown.
Substrata. Known only on dead wood of Quercus species such as Q. cerris, Q. cocifera, Q. ilex. Q. pubescens, Q. rotundifolia, Q.suber and Q. troyana.
Distribution. A rare Mediterranean species, known from Portugal in the west to Cyprus and Turkey in the east; also in Morocco and Algeria.
Taxon name: