Japan Flora: Rhizomes rather short, ascending, densely clothed with stubs of old stipes; fronds glabrous, tufted; stipes 4-20 cm. long, light brown, 1.5-2 mm. across at base, smooth, sulcate on upper side, sparsely scaly at base; scales on stipes and rhizomes membranous, broadly lanceolate to narrowly deltoid- ovate, 4-6 mm. long, pale brown, deciduous; blades herba­ceous, ovate to narrowly so, 5-15 cm. long, 2.5-6 cm. wide, acute, yellowish green, 2- to 4-pinnate; pinnae 4-7 on each side, oblong-ovate, short-petiolate; ultimate sterile pinnules ovate to oblong, 5-8 mm. long, 2-6 mm. wide, few-toothed or lobed to parted; veinlcts not reaching the margin of the tooth; ultimate fertile pinnules lanceolate, 4-10 mm. long, 2-4 mm. wide, sub- obtuse, crenate; sori terminal on the veinlets; false indusium hyaline, undulate. July-Oct. Rocky alpine slopes

Hok­kaido, Honshu (n. distr.); rare. s. Kuriles, s. Sakhalin, Siberia to Europe.