Japan Flora: Rhizomes creeping, nearly naked, 3-4 mm. across, rather loosely leaved; fronds glabrous, flaccid; stipes 20-30 cm. long, pale green, brownish at base, sparingly scaly; scales linear-lanceolate, dark brown, 3-5 mm. long, about 1 mm. wide, entire or obsoletely toothed on margin; blades deltoid-lanceolate, 25-35 cm. long, 15-20 cm. wide, simply pinnate, caudate-acuminate, broad at base; pinnae 10-12 pairs, thinly herbaceous, lanceolate, 7-11 cm. long, 2-2.5 cm. wide, caudate-acuminate, falcate，the upper ones adnate and decurrent on the winged rachis, the lower ones short-petiolulate, auriculate and nearly truncate on outer side at base, cuneate on lower side, pinnately lobulate and acutely denticulate or doubly toothed; costa raised beneath, the veins pinnate, the veinlets very slender, distinct on both sides; sori subcostal, linear, to 1 cm. long; indusia linear, en­tire, straight, solitary, rarely diplazioid. Woods

Honshu (Izu Prov. through Tokaidd and s. Kinki to Chugoku Distr.), Shikoku, Kyushu; rare.