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Page number:44 
Remarks (internal):The basidiocarps of this species usually appear in the summer or late spring from April to July (Jahn 1963). The species is closely related to Polyporus brumalis, which has larger pores. 
Description type:Non-original description 
Description:Polyporus ciliatus Fr. Fig 11 Syst. Mycol. 1:349, 1821. P. vernalis Fr., Hymen. Europ. p. 527, 1874. P. platensis Speg., Ann. Soc. Cien. Arg. 12:83, 1881. P. guarapiensis Speg. Ann. Soc. Cien Arg. 16:83, 1888.
Basidiocarps annual, centrally stipitate; pileus circular, up to 10 cm in diameter and 7 mm thick; upper surface light brown, then umber, glabrous or squamulose, azonate, margin glabrous to ciliate; pore surface light cream to tan, pores circular, 5-7 per mm, slightly decurrent on the stipe, tube layer concolorous with the pore surface, distinctly darker and more dense than the context; context hard, white, 1-3 mm thick, up to 2 mm thick; stipe up to 7 cm long and 8 mm thick, light ochraceous to dirty brownish, with a fine tomentum that disappears with age.
Hyphal system dimitic; generative hyphae thin-walled, hyaline, with conspicuous clamps, inflated to 10 µm in the context, weakly amyloid in the stipe, indistinct in the stipe and pilear cuticles; skeleto-binding hyphae hyaline to light brown, thick-walled, nonseptate, up to 8 µm in diam. Basidia clavate, 4-sterigmate, 16-22 x 4-6.5 µm, with a basal clamp. Basidiospores allantoid to cylindrical, 5-7 x 2 µm.
Cultural characteristics. See David & Romagnesi 1972; Stalpers 1978.
Substrata. On dead hardwoods including Acer, Aesculus, Alnus, Betula, Corylus, Cornus, Crataegus, Eucalyptus, Fagus, Fraxinus, Malus, Populus, Prunus, Pyrus, Rhamnus, Robinia, Quercus, Salix, Sorbus, Tilia, and Ulmus, rarely on conifers like Abies, Picea, and Pinus.
Distribution. Widespread in the temperate zone of Eurasia and Europe. Not known from North America and Japan.

 
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