Japan Flora: Rhizomes ascending to short-creeping, clothed with basal remains of old stipes; fronds tufted; stipes firm, pale green to purplish, dull, 2-grooved on upper side, 10-25 cm. long, about 1.5 mm. across, very sparsely scaly in upper part, densely so at base, the scdes linear-lanceo­late, 3-6 mm. long, deep brown, gradually narrowed to a long filiform tip, entire; blades oblong-ovate to ovate, 15-35 cm. long, 斗-10 cm. wide, acute to short-acuminate, nearly glabrous, 3- or 4-pinnatiparted; pinnae 8-10 pairs, obliquely spreading, deltoid-ovate, acuminate, petiolulate; lower pinnules petiolu­late; ultimate pinnules firmly herbaceous, oblanceolate-cuneate, 4-7 mm. long, 1.5-2.5 mm. wide, ascending, unlobed or deeply 3-fid, usually bidentate at the tip, deep green above, whitish green beneath; veins 1-3 in the segments, nearly parallel, slender, often once forked at the tip; sori 1-3 to a segment; indusia linear, 1-3 mm. long, closely parallel.

Honshu (Izu Prov. through Tokaido to Kinki Distr. and westw.), Shikoku, Kyushu. Ryukyus, Formosa, and s. Korea.