Japan Flora: Rhizomes short-creeping, densely scaly; stipes 15-35 cm. long, pale green, usually chestnut-brown toward base and often on under side, lustrous; scales brown, thinly herbaceous to submembranous, ovate, (2-)4-8 mm. long, short-acuminate, entire, spreading; blades 5-angled, 15-25 cm. long and as wide, tripinnate to tripinnatiparted, glabrous, uniformly green, the rachis pale green, the scales scanty, about 2 mm. long; pinnae petiolulate, spreading, narrowly deltoid-ovate, 10-18 cm. long, short- attenuate, with a broader posterior side, the upper ones ab­ruptly smaller; ultimate pinnules oblong-ovate, 1-2.5 cm. long, obtuse, oblique, short-petiolulate，acutely denticulate; sori sparse, few, at base of the teeth especially on anterior margin of the segments, orbicular-reniform, about 1 mm. across, en­tire, brown, incurved on margin.  Woods.

Hokkaido, Hon­shu (Kinki Distr. and eastw.). Korea.