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Page number:537 
Description type:Non-original description 
Description:Phlebia tremellosa (Schrad.) Nakasone & Burds. [as 'tremellosus'], Mycotaxon 21: 245, 1984.
Bas.: Merulius tremellosus Schrad., Spicil. fl. germ. 1: 139, 1794.
Basidiome commonly pileate, dimidiate, fruitbodies imbricates, widely effused and covering large part of the substrate, fleshy and gelatinous, hymenophore merulioid with irregular alveoles and ridges, cream coloured, pileate sterile surface tomentose to strigose, whitish with greyish tints, margin fibrillose. Hyphal system monomitic, hyphae with clamps difficult to see, arranged in two layers (hymenial and tramal), subhimenial hyphae densely interwoven and embedded in a gelatinous matrix, 2-3 µm wide, tramal hyphae arranged in a more open texture, 4-5 µm with slighty thickened walls. Cystidia absent, but projecting hyphae are present, often encrusted. Basidia narrowly clavate, 20-25 x 4-5 µm, thin-walled, with 4-sterigmata, and a basal clamp, arranged in a dense palisade. Basidiospores allantoid, 4-4.5 x 1-1.5 µm, smooth, thin-walled, guttulate, IKI-.
Distribution in Europe: Germany, Poland, Russia, Estonia, Irland, Czech Republic, Bulgaria, Bosnia and Herzegovina, Croatia, Macedonia, Slovenia, Serbia, Greece, Belgium, United Kingdom, Slovenia, Belarus, France, Norway, Sweden, Finland, Russia, Romania, Bulgaria, Portugal, Turkey, Italy, Spain, and the Caucasus. Very common species, often overlooked.
Substrata: more common on deciduous wood of Populus nigra, trunks of Fagus sylvatica, Castanea sativa, Quercus spp., but sometimes on Pinus pinea and P. nigra.
 
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