Japan Flora: Rhizomes creeping, 3-4 mm. across, densely scaly toward the tip; stipes slender, 20-40 cm. long, glabrous, straw- colored or pale green, thinly scaly and dark brown toward base; scales brown, broadly linear, 3-5 mm. long, about 0.5 mm. wide, long-acuminate, entire; blades chartaceous, simply pinnate, broadly lanceolate to narrowly ovate, 20-30 cm. long, 10-20 cm. wide, caudately long acuminate, glabrous, the rachis and costas usually thinly white-puberulent on both sides; pinnae 5-7 pairs, alternate or subopposite, nearly equilateral, spreading, lanceolate to broadly so, caudately long-acuminate, falcate, truncate at base, sessile, the lower pinnae pinnately lobed to parted, 15-25(-30) mm. wide, short-petiolulate, the upper pinnae decurrent on the rachis, forming a pinnatilobed tail at the tip; pinnules oblong-ovate to lanceolate, 4-6 mm. wide, obtuse to acute, spine-toothed; veinlets simple or forked, ending in a tooth; sori 6-14, median or slightly nearer the costule than the margin; indusia short, obovate, straight, or more often reniform, 0.5-0.7 mm. across, dentate. 

Honshu (Izu and Echigo Prov. westw.), Shikoku, Kyushu. Korea (Quelpaert Isl.) and China.