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The "Oo-kijino-o" (Plagiogyria euphlebia) belongs to the family Plagiogyriaceae. It is an evergreen fern that is distributed from the Kanto region of Honshu west to Shikoku and Kyushu in Japan, Taiwan, the Korean Peninsula, China, the Indochina Peninsula, the Himalayan region, and India. It grows under forests in mountainous areas and grows 40 to 100 cm tall. The leaves are dimorphic. The sterile fronds are yellow-green to green, slightly shiny, and stiffly papery. The pinnae are stipitate and not curved into a sickle shape. The pinnae of the fertile frond are linear and stipitate. It also bears a long sorus along the midrib of pinnae, which withers after ripening. In Taiwanese Chinese, it is called "華中瘤足蕨" and "華中瘤足蕨" (hua zhong liu zu jue).
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