Gloeophyllales » Gloeophyllaceae » Hispidaedalea

Hispidaedalea imponens

Hispidaedalea imponens (Ces.) Y.C. Dai & S.H. He 2014, in He et al., Mycological Progress, 13, 833-839 (2014).

Basionym: Daedalea imponens Ces. 1879

Diagnosis: Pileus -6 cm in radius, -12 cm (Parmasto), sessile or with a short resupinate base, applanate, slightly ascending, dimidiate, rigid, densely strigose with more or less ramified processes -7 x 0.2-0.5 mm and weathering off, dark brown, zoned (Parmasto); margin entire, thin, subacute, paler brown. Tubes -12 mm long, dark brown, drying paler; pores 2-4 mm wide and hexagonioid in the proximal part of the pileus, in the distal part lengthening and becoming radial slots to lamellate-dichotomous, with obtuse edges or irregularly dentate (Parmasto), occasionally with a short secondary gill near the margin of the pileus, dark brown. Flesh 1-2 mm thick, fibrous-coriaceous, rich dark brown, without crust, drying corky-tough (Parmasto). On fallen trunks in the forest. Sarawak, Bako National Park, 26 Aug. 1972, Corner P 172. Sarawak, Philippines, Hainan.

Spores 10-13 x 3.2-4, µm, av. 11.67 x 3.59 µm, cylindric (Parmasto). Basidia 40-50 x 5-6 µm with 4 sterigmata (Parmasto). Hymenium thickening -170 µm (Parmasto). Cystidia 30-80 x 3-5 µm, or swollen - 6 µm in the proximal part, subacute, not distinctly encrusted but often with uneven surface, thick-walled, subacute to obtuse, rather fusoid, hyaline and colourless but pale ochraceous brown in Melzer's iodine, very abundant and forming most of the hymenium, catahymenial, gradually lengthening with undulate or submoniliform apex in the older parts of the tubes or gills, derived from generative hyphae and skeletal ends. Hyphae dimitic then trimitic from the base of the older fruit-bodies, not dextrinoid, not encrusted, felted-interwoven; generative hyphae 1.5-4 µm wide, thin-walled, colourless, clamped; skeletal hyphae 3-3.5 µm wide in the flesh and dissepiments, -4 µm in potash and slightly darkening, the fuscous brown walls -1 µm thick (swelling internally in potash), aseptate, unbranched, apparently unlimited, woven in all directions, with very short or no mediate part; binding hyphae 1.5-2.5 µm wide, wall -0.5 µm thick, more or less colourless, lax, sparingly branched at a wide angle, without flagelliform ends, developing in the old flesh from the base of the fruit-body, sparse; dissepiments dimitic, not agglutinated: hyphal pegs none.

This is my description drawn from my Sarawak collection which was sterile. It is supplement with notes from the detailed account given by Parmasto, which enabled me to identify my collection. Parmasto emphasized the resemblance with Hexagonia apiaria with hexagonal pores and copious hyphal pegs, and also with Coriolopsis telfari, which lacks the cystidia (Teng ,1990).

Index Fungorum Number: IF803880

 

Figure 1. Phylogenetic tree obtained from Maximum Parsimony and Bayesian analysis of combined ITS and nLSU rDNA sequences of Gloeophyllales. Fomitopsis pinicola was used as an outgroup. Parsimony bootstrap proportions (>50 %) and Bayesian posterior probabilities (≥95 %) are shown before and after the forward-slash respectively.