Japan Flora: Rhizomes long-creeping, slender, about 2 mm. across, the scales dense, ascending, linear, 4-5 mm. long, filiform at the tip, sparsely toothed; blades simple, linear, 3-8(-13) cm. long, 2-5 mm. wide, very obtuse, gradually narrowed toward base, entire, sessile, with red-brown to pale brown stellate hairs beneath, sparsely so above; costa glabrous beneath; sori in 2 parallel series along the costa on upper part of the blade, subconfluent, elliptic to round.  Rocks and tree trunks in mountains. 

Hokkaido, Honshu, Shikoku, Kyushu. Korea, Manchuria, China, and Formosa (var.).