"Seitaka-shike-shida" (Deparia dimorphophylla) belongs to the Woodsiaceae family. It is a summer-green fern that is native from Miyagi-Yamagata perefecture of Honshu south to Shikoku and Kyushu, as well as the Korean Peninsula and China. This fern grows in wed forest floors and it can reach 40-80 cm in height. The leaves are unipennate, ovate-deltoid, gray-bluish green and matte. The leaves have two types, the sterile fronds are larger than the fertile fronds. The petioles are greenish brown with pale-brown lanceolate scales. The pinnae are narrow oblong with acute tips, and bear almost right angle at the rachises. The sori are linear and arranged near the rachises.