Japan Flora: Rhizomes short, ascending, the scales linear-lanceolate to broadly linear, about 3 mm. long, entire, gray-brown; fronds tufted, glabrous; stipes erect, 2-5 cm. long, 0.5-1 mm. across, chestnut-brown, lustrous at least on lower half, green at tip, shallowly sulcate on upper side; blades suberect, linear to linear-lanceolate, 5-12 cm. long, 8-12 mm. wide, obtuse, not or slighdy narrowed at base; pinnae 10-17 pairs, herbaceous, rhombic-ovate to rhombic-orbicular, 3-6 mm. long, 3-5 mm. wide, obtuse to very obtuse, oblique and broadly cuneate at base, with few obtuse teeth near tip, entire near base, sessile or very short-petiolulate, the costas and veins very slender, inconspicuous on both sides, the veins usually once forked; sori 2-6 on a pinna, on the lower portion of veins, subcostal; indusia 1-15(-2) mm. long.  On rocks in alpine regions;

Hokkaido, Honshu (centr. and Kanto Distr.), Shikoku (Mount Tsurugi in Awa Prov.); rare. Sakhalin, Formosa to the Himalayas, Europe, and N. America.