Japan Flora: Rhizomes ascending, with the basal stubs of old stipes toward the tip; stipes rather slender, brownish green, glabrous, thinly scaly toward base; scales membranous, broadly lanceolate to narrowly deltoid-ovate, 2-4 mm. long, brown, crisped, de­ciduous; blades narrowly deltoid, 20-30 cm. long, 15-25 cm. wide, short-acuminate, 3-pinnatiparted, blackened when dry, slightly glaucescent beneath, thinly puberulous while very young; pinnae 6-8 pairs, the lower opposite, 7-13 cm. long, 3-6 cm. wide, acuminate, spreading, subsessile, the median ones not contracted at base, the lowest pinnae contracted at base, short-petiolulate; pinnules oblong, 15-40 mm, long, 7-15 mm. wide, acute to obtuse, sessile, pinnatiparted, the ultimate pinnules oblong, rounded at apex, obsoletely toothed to loba- late; sori 3-8 in 2 series on each pinnule, rounded, naked, less than 1 mm. across, brown. Mountains.

Kyushu (Yakushima). Formosa and Bonins.