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Page number:513 
Remarks (internal):As a rule determined without difficulty, thanks to the numerous, characteristic cystidia. Presence of clamps should be checked. Deviating specimens are now and then seen, e.g. L. Arvidsson 1973-10-27 (Sweden: Bohuslän, Save par., Lindesnäs, on decayed wood), which has numerous gloeocystidia, few projecting cystidia, which are less encrusted and have less thickened walls. Young cystidia are often subcapitate. Tbis specimen has a somewhat amyloid context. Amyloid is also Hauerslev 4711 (Bornholm, Rutsker, Højlyng, 1964-10-12) and agrees in the presence of gloeocystidia.
H. puberum differs from other species of Hyphoderma in the nature of cystidia and the dense, phlebioid context, which gives the fruitbodies a ceraceous consistency and makes it more like a Phlebia in outer appearance, especially when alive and wet.
 
Description type:Non-original description 
Description:Hyphoderma puberum (Fr.) Wallr., Fl. crypt. Germ. p. 576, 1833.-Thelephora pubera Fr., El. fung. 1 p. 215, 1828.
Fruitbody resupinate, effused, adnate, ceraceous, to 0,3 mm thick, at first whitish, when mature argillaceous, ochraceous, or isabellinous; hymenium under the lens (50 x) velutinous by numerous projecting cystidia, porose when young and dry, then totally continuous; margin mostly thinning out, in other cases abrupt or in some fruitbodies finely fibrillose under the lens (50 x).
Hyphal system monomitic; hyphae thin-walled, richly branched, 3-4 µm wide, with clamps at all septa; context often rather loose next to the wood but else densely united into an almost pseudoparenchymatic structure, esp. in the subhymenium which in mature specimens forms the major part of the section. Cystidia numerous, tapering to the acute apex, strongly projecting but with time enclosed in the subhymenial layer, starting in the basidial level in the hymenium and at first thin-walled and naked, later with much thickened walls and strongly encrusted, 60-130 (-200) x (9-) 12-18 µm. In most mature specimens no other cystidia can be seen but in some cases there are also thin-walled, enclosed gloeocystidia, 30-60 x 7-10 µm. Stephanocysts present in cultured mycelia. Basidia subclavate to clavate, often somewhat constricted, 22-30 x 5-6 µm, with 4 sterigmata and basal clamp. Spores subcylindrical or narrowly ellipsoid, thin-walled, smooth, nonamyloid, with oily inclusions in the protoplasm, site of nucleus often visible, 7-10 x 3,5-5µm.
Habitat. On decayed, decorticate wood of deciduous trees or less often on bark, sometimes on conifers, in generally humid, fertile biotopes, e.g. in herb-rich deciduous forests.
Distribution. Rather frequent in South Scandinavia, locally even common, in the Northern parts occurring in suitable habitats along the coasts, rarer in the inland.
 
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