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Page number:201 
Remarks (public):The species is usually easy to recognize late in the season when the pale brown brittle tube layer contrasts strongly with the white floccose margin. The pores are smaller and the spores more narrow than in C. aneirina which seems to be the closest relative. 
Description type:Non-original description 
Description:Ceriporiopsis resinascens (Rom.) Dom. - Acta Soc. Bot. Pol. 32:732, 1963. - Polyporus resinascens Rom.. Arch. Bot. 11:20, 1911. - Poria pseudogilvescens Pilat. Bull. Soc. Mycol. Fr. 51:378, 1935.
Basidiocarps annual. resupinate to nodulose on sloping substrata, adnate, soft when fresh. resinous and brittle when dry, up to 8 cm wide and long in large specimens. usually smaller, up to 3 mm thick; margin white and floccose, usually contrasting with the pore surface; the latter at first whitish. ochraceous or pale straw coloured to unevenly pale dirty brown. soon becoming evenly pale brown. pores angular. 3-4 per mm. larger and more irregular on nodulose specimens: subiculum whitish and fibrous, up to 3 mm thick and contrasting strikingly with the resinous. partly cartilaginous tube layer. sometimes with a dense dark zone next to the substratum; tube layer concolorous with pore surface, brittle when dry, up to 6 mm thick.
Hyphal system monomitic: subhymenial generative hyphae with clamps, thin-walled, hyaline, distinct, 2-4 µm in diam: in the central trams distinctly thick-walled and agglutinated with irregular resinous substances, these partly crystalline and partly as globules or drops: in the subiculum thick-walled, distinct, moderately branched, with scattered clamps, fragmenting and in broken sections easily taken as skeletal hyphae, 2-6 µm in diam.
Cystidia absent. but slightly swollen hyphal ends do occur in the dissepiments. Basidia clavate, 4-sterigmate, 18-24 x 4-6 µm, with a basal clamp.
Basidiospores cylindric to oblong-ellipsoid, smooth. hyaline, negative in Melzer's reagent. 4-6(-8) x 2-3 µm.
Type of rot. White rot in dead hardwoods.
Cultural characteristics and sexuality. Unknown.
Substrata. Dead hardwoods, with Populus and Salix as preferred substrates, especially in the Nordic countries, but also recorded from Alnus, Betula, Carpinus, Prunus and Sorbus.
Distribution. Seemingly following Populus from the North Cape area to Southern Europe, but absent from Western Europe. An Eurasian species, not recorded in Japan and North America; its eastern limit in Siberia is unknown.
 
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