Japan Flora: Rhizomes creeping; stipes light green, 30-50 cm. long，with deciduous scales; scales membranous, linear to broadly lanceolate, 3-10 mm. long, about 2 mm. wide, entire, unequal, fuscous-brown; blades thinly herbaceous to membranous, deltoid-ovate, or sometimes oblong-ovate, 40-80 cm. long, 25-50 cm. wide, acuminate，to bipinnatiparted to bipinnate, green, the rachis sometimes with minute dark brown scales; pinnae 7-10 pairs, opposite to alternate, oblong- ovate, 20-40 cm. long, subsessile, the lower pinnae often short- petiolulate with a pair of smaller pinnules at base, the costas on both sides with some hair like scales，the rachis winged; pinnules broadly lanceolate to oblong, 3-6 cm. long, 1-1.5 cm. wide, acuminate to obtuse, usually broadly adnate at base to the rachis, crenate-toothed or pinnately lobed to cleft; sori 10- 20, rounded; indusia reniform or sometimes hamate-oblong, about 0.5 mm. wide, erose-dentate. Woods.

Honshu, Shi­koku, Kyushu.