Japan Flora: Evergreen; rhizomes stout，short; fronds crowded, glabrous, simply pinnate, to 1 m. high; stipes 30-60 cm. long; sterile blades 30-6D cm. long, 20- 40 cm. wide, the rachis 2-grooved on upper side, rounded on back; pinnae chartaceous, spreading, 10-15 pairs, linear-lanceo­late, 10-20 cm. long, 12-20 mm. wide, long-acuminate, acute at the tip, cuneate-rounded at base, short-petiolulate, minutely toothed toward base, more prominendy so toward the tip, the terminal pinna usually distinct, sometimes few-lobed at the base, the costa slightly raised, the veins distinct on both sides, usually once-forked, horizontally spreading, closely parallel; fertile pinnae short-petiolulate, 7-29 cm. long.

Honshu (Echigo and Hitachi Prov. and westw.), Shikoku, Kyushu. s. Korea (Quelpaert 1st), Ryukyus, Formosa, China to India.