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The "Nokogiri-hera-shida" (Diplazium tomitaroanum) belongs to the family Woodsiaceae. It is an evergreen fern that is distributed from Chiba prefecture of Honshu west to Shikoku, Kyushu, and the Nansei Islands in Japan, as well as Taiwan and China. This fern grows on a slightly damp forest floor in the mountains and can reach 30 to 50 cm in height. Similar to "Hera-shida" (Diplazium subsinuatum), but with wavy leaf edges and shallow to deep fissures like saw teeth. The sori line up linearly on both sides of the main vein. In Taiwanese Chinese, it is called "羽裂葉對嚢蕨" and "羽裂葉対嚢蕨" (yu lie ye dui nang jue). Sometimes it is referred to as the genus Deparia.
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