Japan Flora: Rhi­zomes creeping, black-brown, sparsely scaly, 3-5 mm. across; fronds deciduous; stipes rather slender, 20-60 cm. long, pale green to dark purple-brown, lustrous, sparsely scaly; scales membranous, lanceolate, 4-6 mm. long, remotely dentate, pubescent to nearly glabrous, brown, deciduous; blades deltoid- ovate to oblong, 20-50 cm. long, 15-25 cm. wide, acuminate, the rachis and costas prominently short-hairy on upper side; pinnae 10-18 pairs, thinly herbaceous, broadly linear3 8-20 mm. wide, acuminate, mostly reflexed, slightly narrowed at base, sessile, pinnatiparted, with spreading short hairs especially on the costas beneath, thinly ascending-pilose above; pinnules narrowly oblong, 2.5-35 mm. wide, crenate to sabentire; vein- lets simple; sori in 2 series between the costule and margin; indusia membranous, rounded-reniform, about 1 mm. across, pale, shortpilose on back.

Hokkaido, Honshu, Shikoku, Kyushu; common. Korea, China, and Formosa.

var. musashiensis (Hiyama) Honda. Scales darker brown; indusia nearly glabrous.  Honshu (w. Kanto to s. Shinano Prov.).

var. glabrata (Ching) Ohwi. Plant glabrescent. occurs rarely in our area.