Japan Flora: Rhizomes long-creeping, 2-2.5 mm. across, densely scaly, the scales ascending, brown, mem­branous, deltoid-lanceolate, 2-2.5 mm. long, ciliate; fronds deciduous; stipes slender, remote, 2-10 cm. long, naked or with a few scales at base; blades membranous, ovate-deltoid, 4-10 cm. long, 3-6 cm. wide, truncate at base, pinnately parted, minutely and closely toothed, glabrous on upper side, some­what glaucous beneath, thinly scaly beneath while young; segments 1-4 pairs, spreading, narrowly oblong to lanceolate, 6-12 mm. wide, obtuse to acute, decurrent on the winged rachis, the lowest slightly narrowed at base on posterior side, the terminal the longest, linear-lanceolate to lanceolate-ob­long, 2.5-6 cm. long, usually acuminate, often acute or obtuse in smaller fronds; sori round, about 2 mm. across, in 2 series on the terminal or upper pinnae, rarely over the whole blade, slighdy nearer the costa than the margin. Rocks in mountains.

Hokkaido, Honshu, Shikoku. Korea (Quelpaert Isl.), China to Tibet.