Japan Flora: Rhizomes short, erect to ascending; fronds glabrous; stipes tufted, slender, jointed slightly above the base, 1-2.5 cm. long, sparsely scaly near base, the scales pale brown, membranous, elliptic to ovate, acuminate, entire; blades thinly herbaceous, narrowly lanceo­late, 3-7 cm. long, 6니 2 mm. wide, acute to acuminate， slightly narrowed at base, smooth; pinnae sessile，spreading, ovate-orbicular in the lower ones, ovate-triangular to rhombic- ovate in median and upper ones, 3-6 mm. long, 3-5 mm. wide， obtuse to acute, broadly cuneate to nearly truncate at base, sessile, pinnatiparted, rarely simply dentate; pinnules elliptic to obovate, obtuse, with few obtuse teeth; sori small, 1^3 on a segment, yellow-brown; indusia small, salverform, finely dis­sected into hairlike segments. 

Hokkaido, Honshu (centr. mountains); rare. Sakhalin, Kamchatka, Korea, China, Manchuria, Siberia to northern N. America.