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The "Takasago-inu-warabi" (Athyrium silvicola) belongs to the family Woodsiaceae. It is an evergreen fern that is distributed from southern Kagoshima Prefecture in Kyushu to Yakushima Island, as well as in Taiwan, southern China, and Nepal. It grows in mountainous forests and reaches a height of 40 to 60 cm. The leaf blade is a triangular, twice- or thrice-pinnate compound leaf, measuring 20-40 cm in length. The petioles are 20-35 cm long, straw-colored, with two grooves, and have a dark, scale-like base. The upper surface of the leaves has spines along the grooves of the leaflets and the midrib. The spore clusters are oblong or short-linear, with 3-4 pairs on each pinna, located near the midrib. It is classified as Critically Endangered (CR) in the Ministry of the Environment's Red List. In Taiwanese Chinese, it is called "高山蹄蓋蕨", and in Chinese, it is known as "高山蹄蓋蕨" (gao shan ti gai jue).
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