Japan Flora: Rhizomes creeping, stout, blackish; stipes 45-60 cm. long, stout, sparsely scaly and about 1 cm. across at base; scales fugacious, fuscous, membranous, lanceolate to linear-lanceolate, about 5 mm. long, 1-2 mm. wide, entire; blades deltoid-ovate, 40-80 cm. long, 30-60 cm. wide, bipinnate, the rachis greenish, glabrous or very thinly puberulous; pinnae 8-13 pairs, spreading, oblong-lanceolate, the lowest 18-40 cm. long, 8-13 cm. wide, acuminate, petiol ulate; pinnules deltoid-lanceo­late to linear-lanceolate, 4-7 cm. long, 1.3-2 cm. wide, acumi­nate, truncate at base, short-petiolulate or sessile, pinnately cleft or sometimes parted; ultimate pinnules elliptic, obsoletely toothed; veinlets simple, or lower ones forked; sori median, linear, 2-3 mm. long; indusia thin, erose, solitary, frequently diplazioid in the lowermost lobe.  Woods in low moun­tains;

Honshu (Izu, Etchu Prov. and westw.), Shikoku, Kyu­shu. Korea (Quelpaert Isl.), and Ryukyus.