Japan Flora: Rhizomes short, stout; stipes 20-45 cm. long, scaly; scales near base brown to black-brown, linear-lanceolate, 6-10 mm. long, entire, the upper ones membranous, deflexed, lanceolate-deltoid, 3-5 mm. long, entire; blades narrowly deltoid or deltoid-ovate, 20-50 cm. long, 15-30 cm. wide, acuminate, bipinnate, the rachis with small lanceolate-deltoid scales cordate or saccate at base; pinnae deltoid-lanceolate, 15-20 cm. long, 3-7 cm. wide, acuminate, sessile or nearly so, usually horizontally spreading, the rachis and costules beneath with appressed ovate-saccate brown scales about  mm. long; pinnules deltoid-ovate to narrowly oblong, 1.5-4.5 cm. long, 5-15 mm. wide, obtuse to rounded at apex, truncate, sometimes rounded at base, somewhat whitish be­neath, sessile, usually pinnately parted to lobed, at least the lower, toothed; veins indistinct; sori median, usually in 2 series on the pinnules; indusia orbicular-reniform, entire, about 1 mm. across.  

Honshu (Izu, Mikawa Prov. and westw.), Shikoku, Kyushu. Formosa.