The Japanese common edible mushroom called “nameko” at present is a species belonging to Pholiota. This species has been identifi ed as P. nameko (T. Ito) S. Ito & Imai (= Collybia nameko T. Ito, 1929). The type specimens of C. nameko are not traced in herbaria. The plate of the original description is designated as the lectotype of C. nameko T. Ito. The Himalayan species P. microspora (Berk.) Sacc. (= Agaricus microsporus Berk., 1850) is identical with “nameko.” The author concludes P. nameko is a synonym of P. microspora.
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Hitoshi Neda (2008) studied this question.
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