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The Crown wood-fern (Dryopteris crassirhizoma) belongs to the family Dryopteridaceae. It is a summer-green fern that is native from Hokkaido to Honshu and the Mt. Tsurugi in Shikoku of Japan, as well as the Korean peninsula and northeastern China. This fern grows gregariously in montane forests, and it can reach 70-100 cm in height. The leaves are bipinnate compound, yellowish-green to dark green, glossy, and soft and leathery. The petiole is short, and there are grooves on the rachis and petiole. The veins of the lobes are sunken, and the secondary veins fork. The base of the petiole is densely covered with shiny yellowish-brown to blackish-brown scales. The sorus is crowded only on the upper pinna. In Chinese, it is called "粗茎鱗毛蕨" (cu jing lin mao jue).
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