United States
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Inonotus and its related genera, Asterodon, Aurificaria, Coltricia, Coltriciella, Hydnochaete and Hymenochaete (Hymenochaetaceae) from China were studied. All the species are characterized by an annual growth habit and a monomitic hyphal structure. The genus Inonotus s. lato is divided into the more homogeneous genera Inocutis, Inonotopsis, Inonotus, Mensularia and Onnia. In China, 48 species are recognized from 11 genera. Keys were prepared to the genera and species; all the species are illustrated, and their taxonomy is discussed. Spore dimensions of the species were measured from Chinese material, their statistical variations are given, and all studied specimens are listed. Collections from other continents, mostly Europe and North America, were examined for comparison. Coltriciella naviculiformis Y.C. Dai & Niemela and Inonotus sublevis Y.C. Dai & Niemela are described as new species. A new combination, Onnia vallata (Berk.) Y.C. Dai & Niemela, is proposed. Polyporus subperennis Z.S. Bi & G.Y. Zheng is synonymized with Coltriciella dependens (Berk. & M.A. Curtis) Murrill. Seven species of Phellinus s. lato (Cyclomyces, Fomitiporia, Fuscoporia and Phellinus) are treated, not included in a previous monograph on Phellinus s. lato from East Asia, but now known in China.
