Japan Flora: Plant glabrous; rhizomes slender, creeping, rather 友rm， about 3 mm. across, scaly; stipes 20-40 cm. long, straw- colored, very sparingly scaly; scales pale brown, membranous, broadly linear, 4-6 mm. long, about 1 mm. wide, deciduous; blades herbaceous, ovate to narrowly so, 25-35 cm. long, 12-25 cm. wide, acuminate-caudate, usually bipinnate; pinnae 6-10 pairs, alternate except the lowest 2, broadly lanceolate, 3-6 cm. wide, long-acuminate, somewhat oblique, petiolulate; pinnules broadly lanceolate to ovate, 1-3 cm. long, 3-12 mm. wide, obtuse to acuminate, pinnately parted to lobulate, acutely toothed, the lower ones often very short-petiolulate, the upper pinnules decurrent on the rachis; sori on the ultimate pinnules, linear, closely parallel; indusia lunate-lanceolate, 1-15 mm. long, frequently hamate (athyrioid), irregularly dentate. Shaded places in lowlands.

Hokkaido (sw. distr.), Honshu, Shikoku, Kyushu; common. Korea, Manchuria, China, and Formosa