Japan Flora: Rhizomes short-creeping, 3-4 mm. across, with purple-brown to dark brown broadly linear scales 3-4 mm. long； fronds evergreen, glabrous; stipes 10-20 cm. long, purple-brown to dark brown, lustrous, terete; blades nar­rowly triangular-ovate, 10-25 cm. long, 4-8 cm. wide, smooth, 3- or 4-pinnate, the rachis lustrous, purple-brown, flexuous; pinnae 4-6 on each side, the upper ones gradually reduced; pinnules subcori이:eous, obtriangular, 5-12(-15) mm. long, 4-8 (-12) mm. wide at the truncate-rounded toothed apex, cuneate in lower half, short-petiolate, slightly lustrous on up­per side, often slightly glacuous beneath; veins slender, obsolete, palmate; sori mostly solitary in the center of upper margin; false indusia reniform, 2-3 mm. long, 2.5-4 mm. wide, gla­brous, entire. Mountains.

Honshu (Uzen and Rikuzen Prov. southw.), Shikoku, Kyushu; common.  s. Korea, For­mosa, and China.