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The "Kana-warabi" (Arachniodes rhomboidea) belongs to the family Dryopteridaceae. It is an evergreen fern that is distributed from southern Kanto district of Honshu westwards to Shikoku and Kyushu in Japan, as well as Taiwan, the Korean Peninsula, Southeast Asia and India. It grows in mountain forests and along streams. The leaves are bipinnate compound, 35-75 cm long and 25-40 cm wide. The leaves are bright green, soft and shiny. There are 5-10 pairs of lateral pinnae, and above these are the terminal pinnae. The pinnules are parallelogram. The sorus is attached near the margin of the pinnules, and the indusium is reniform. It is also known as "Oo-kana-warabi". In Taiwanese, it is called "斜方複葉耳蕨", and in Chinese, it is called "斜方複葉耳蕨" (xie fang fu ye er jue).
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