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Page number:91 
Remarks (internal):Phlebia tremellosus is easily distinguishable by its effuso-reflexed basidiomata and the pale orange-yellow to deep orange-red hymenial surface with the radially arranged pits. In Japan, this species is widespread and has been well-known as "Shiwatake" in Japanese name. Nakasone and Burdsall (1984) placed Merulius Fr. in synonymy with Phlebia Fr. on the basis of the basidioma and cultural similarities between the two genera and transferred M. tremellosus into Phlebia. This treatment has been supported by Hjortstam (1987) and Ginns (1993). 
Description type:Non-original description 
Description:Phlebia tremellosus (Schrader: Fries) Nakasone & Burdsall, Mycotaxon 21: 245, 1984. (Fig. 62)
? Merulius tremellosus Schrader, Spicilegium Fl. German., 139, 1794.
Distribution: Africa, Asia [China (Tai, 1979), India (Ginns, 1976), Iran (Hallenberg, 1981), Japan (Yasuda, 1912), Pakistan (Ginns, 1976)], Europe, and North and South America.
Basidiomata resupinate or effuso-reflexed, orbicular, sometimes becoming confluent, fleshy when fresh, 0.4-5 mm thick. drying cartilaginous: abhymenial surface white to grayish white. tomentose to strigose. azonate; hymenial surface "Pale Luteous". "Luteous" to "Orange". drying "Luteous". "Orange" to "Sienna". reticulate to irregularly poroid. the pits 1-4 per mm'. 0.5-1.5 mm in depth: margin white, radially fibrillose in resupinate specimens or hispid in pileate ones. In section subhyaline. containing two layers in the subiculum: a layer of abhymenium (or trama of the ridges) composed of intertwined, richly branched hyphae and a layer. between the subhymenium and the abhymenium. composed of gelatinous hyphae. Hyphal system monomitic; hyphae 2-5 µm in diam, smooth, thin-to thick-walled (up to 2 µm). nodose-septate: cystidia (leptocystidia) occasionally present. cylindrical to narrowly clavate, 30-65 x 4-7.5 µm with a basal clamp. thin-walled, some-times encrusted, projecting up to 20 µm beyond the hymenial surface: basidia narrowly clavate, 16-30 x 3-4.5 µm. with a basal clamp, producing 4 sterigmata: basidiospores allantoid. 3.5-5 x 1-1.5 µm, smooth. thin-walled. non-amyloid.
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