Japan Flora: Evergreen; rhizomes slen­der, long-creeping, 1.5-2 mm. across, rather densely scaly, the scales thinly membranous, ascending to obliquely spread­ing, pale- to rusty-brown, linear-subulate, 2-2.5 nun. long, con­torted at the tip; stipes rather firm, straw-colored, slender, 3-10 cm. long, as long as to shorter than the blade; blades chartaceous, broadly linear to narrowly lanceolate, 5-20 cm. long, 5-10 mm. wide, gradually long-acuminate, sometimes glaucescent beneath, subobtuse at the tip, often abruptly acumi­nate at base, remotely crenate-undulate to subentire; costa slender, the veins ascending, very slender, scarcely visible, the veinlets obsolete; sori depressed, about 2.5 mm. across, in 2 series on upper part of blade, slightly nearer the costa than the margin. 

Kyushu (Yakushima); rare. Ryukyus and For­mosa.