Japan Flora: Rhizomes stout, short, ascending, with brown, membranous, linear scales 1-1.3 cm. long; stipes stramineous, 20-50 cm. long, 3-6 mm. across near the dark purplish brown base, sulcate on the upper side, glabrous; blades oblong-ovate, 30-70 cm. long, 15-30 cm. wide, bipinnatiparted, the rachis stramineous, smooth; pinnae 3-7 pairs, more or less falcate, with a linear elongate tip 7-15 cm, long, pinnatiparted on the posterior side, unlobed or re­motely lobed on the anterior side, opaque, the terminal pinna distinct, narrowly elongate, 15-30 cm. long, 8-15 cm. wide, regularly pinnatiparted; costas with a spine at the base of the pinnules; pinnules lanceolate, 2-8 cm. long, 8-13 mm. wide, sometimes linear-lanceolate or oblong, 2-8 cm. long, 8-13 mm. wide, acute to obtuse, toothed on the sterile margins; veinlets free, indistinct, not reaching the margin.

Honshu (s. Kanto Distn and westw.), Shikoku, Kyushu. China.