Japan Flora: Rhizomes capillary, branched, thinly brown-hairy at the tip; fronds 2-5 cm. long, nearly glabrous; stipes capillary, 1-2 cm. long; blades ovate to oblong-ovate, 1.5-3.5 cm. long, 1.2-1.5 cm. wide, obtuse, the rachis winged; pinnae ovate to ovate-deltoid, 2- to 9-parted, obliquely spreading, the segments emarginate, about 1 mm. wide; indusia orbicular, the valves entire, about 1 mm. wide. Mountains.
Honshu (centr. and Kanto Distr.); rare. sw. China, Malay Peninsula, and Malaysia.