Japan Flora: rhizomes short-creeping, firm, 3-5 mm. across, while young with brownish multicellular jointed hairs; fronds evergreen, 50-150 cm. long, rather coarse, strigose; stipes 30-60 cm. long, dull purple on the lower side, stramineous on the upper side, densely brownish hairy at base, sparsely so above, the callose base of the hairs persistent; blades chartaceous-herbaceous, dark green, paler beneath, broadly lanceolate, 40-100 cm. long, 15-40 cm. wide, abruptly acuminate, scarcely narrowed at base, bipinnate, the rachis glabrous and grooved on the stramineous smooth upperside, densely brownish pilose on the dull purplish underside; pinnae linear-lanceolate, 1.5-3 cm. wide, long- acuminate, thinly hispid on veins especially beneath; pinnules oblong-ovate, 10-20 mm. long, 5-10 mm. wide, acute to obtuse, unequally cuneate at base, sessile, toothed, sometimes lobulate; sori nearly marginal, in the sinus; indusia membranous, semi­rounded, hyaline, entire, glabrous or sometimes with 1 or 2 hispid hairs near base, about 0.7 mm. wide. 

Honshu (Izu Isis., Awa Prov. and westw.), Shikoku, Kyushu. Korea (Quelpaert Isl.), Ryukyus, Formosa, China to India, Malaysia, and Polynesia