Japan Flora: Rhizomes long-creeping, 4-6 mm. across, greenish, densely scaly, the fronds remote, the scales membranous, about 4 mm. long, acuminate, denticulate, lustrous, clathrate; stipes slender, 20-50 cm. long, straw- colored, naked except for a few deciduous scales toward base; blades herbaceous, broadly ovate, 10-25 cm. long, 10-20 cm. wide, pinnate, the racHs narrowly winged at least in upper part; pinnae 2-6 pairs, nearly alike, linear-lanceolate or some­times the sterile lanceolate, 7-15(-20) cm. long, 8-20 mm. wide, long-acuminate, acute to obtuse at the tip, narrowed at base and decurrent on the narrowly winged rachis, entire, rarely crenate-undulate; costa slender, slightly raised, the veins and veinlets obscure; sori ascending to obliquely spreading, linear, 5-15 mm. long, rather remote. Moist woods along streams.

Honshu (Izu Prov. through Tokaido to s, Kinki Distr.), Shikoku, Kyushu. Korea (Quelpaert 1st), Ryukyus, Formosa, China to n. India, and Philippines.