Korea Flora: Plant: Evergreen perennial. Rhizome: Long-creeping, bluish-green; 1.5-3 mm in diameter; bearing blackish-brown scales; leaves sparsely arranged. Stipe: 12-20 cm × 1-1.5 mm; lustrous; brownish with purplish-black tinge to blackish-brown; base with sparse scales. Frond: Blade lanceolate; apex long-attenuate; base truncate; once pinnate; 20-30 cm long. Pinnae: Falcate-oblong-lanceolate; apex acute; margin with obtuse serrations; basal posterior portion poorly developed; anterior base perpendicular, sessile. Venation: Lateral veins mostly once-forked.
Sori: Arranged on lateral veins; positioned between midrib and margin. Indusium: Linear-elongate-ovate. Habitat: On moist rocks; Jeju Island.

Japan Flora: Rhizomes long-creeping, scaly, 1.5-3 mm. across; stipes slender, remote, 12-20 cm. long, 1-15 mm. across, lustrous, purple- to chestnut-brown, glabrous except for few scales at base; scales on rhizomes and at base of stipes lanceolate, 2-3 mm. long, long-acuminate, tardily deciduous, dark brown, with few obsolete teeth on upper margin; blades broadly linear to lanceolate, 18-30 cm. long, 3.5-6(-8) cm. wide, abruptly to gradually long-acuminate, not or very slighdy narrowed at base, glabrous, the rachis with deciduous hairlike dark brown scales while young, lustrous, deeply sulcate on upper side; pinnae rather many, thinly herbaceous to mem­branous, spreading, lanceolate to broadly so, 4-10 mm. wide, subacute to obtuse, toothed toward the tip, entire toward the base, short-petiolulate, the costa slender, sometimes dark pur­ple-brown beneath, close to the posterior margin near base，the veins mostly once-forked; sori dorsal, sparse, linear; indusia 2-6 mm. long, nearly straight, very rarely diplazioid. 

Honshu (s. Kan to through Tokaido to s. Kinki Distr. and westw.), Shikoku, Kyushu. Ryukyus, Bonins, Formosa, Malaysia, China to India, Africa, Polynesia, and Hawaii.