Japan Flora: Rhizomes stout, short, densely clothed with the basal stubs of old stipes; stipes straw-colored, rather densely scaly, the scales black-brown, lustrous, spread­ing, linear-lanceolate, 7-10 mm. long, sparsely long-attenuate, spinose-ciliate on lower margin, the basal scales dark brown, narrowly oblong, abruptly acuminate; blades ovate-lanceolate, 30-40 cm. long, 10-18 cm. wide, bipinnate, the rachis promi­nently scaly, the scales chartaceous, spreading, black-brown, linear-lanceolate to broadly linear, thinly spinulose on lower half; pinnae lanceolate, 13-3 cm. wide; pinnules rhombic- ovate, 8-15 mm. long, 5-8 mm. wide, acute with a short spine at the tip，spinulose-toothed on upper margin; sori 2-10, in 2 series on the pinnules, between the costule and the margin or slightly nearer the costule; indusia about 1.5 mm. across. 

Honshu (Kanto through Tokaido to Kinki and Chugoku Distr.), Shikoku, Kyushu; rare.