Japan Flora: Rhizomes creeping, to 15 cm. long, densely covered with the persistent stubs of old stipes, densely scaly; stipes 25-40 cm. long, brown, scaly at base; scales thinly membranous, pale brown, lanceolate to broadly so, 1.5-2 mm, wide, filiform-acuminate, entire or sparsely fimbriate toward the tip; blades herbaceous, deltoid to ovate-deltoid, 30-60 cm. long and nearly as wide, short-acuminate, glabrous, subtripin- nate, the rachis fulvous, lustrous; pinnae nearly opposite or alternate, the upper ones narrowly oblong-ovate, 10-15 cm. wide, obliquely ascending, gradually acuminate, not or slightly contracted at base, distinctly petiolulate, equilateral except the lowest one, the lowest pinnae largest; pinnules narrowly del­toid-ovate, to 10 cm. long, acuminate to acute, petiolulate; ulti­mate pinnules oblong to narrowly ovate, 5-25 mm. long, obtuse to rounded, short-petiolulate, oblique, toothed, often lobed to parted, often slightly decurrent on the rachis; sori few on the ultimate pinnules, nearly parallel to the costule; indusia lanceo­late, 2.5-3 mm. long, entire, nearly straight, solitary, whitish.  Mountains.

Honshu (Uzen Prov. and southw.), Shikoku, Kyushu. s. Korea.