Japan Flora: Fronds coarse, deciduous; rhizomes long-creeping, terete, 4-5 mm. across, remotely leafy, usually with pale brown jointed hairs at the tip; stipes 20-80 cm. long, rather stout, pale green, glabrous above, with soft hairs at the dark brownish base; blades broadly ovate-triangular, 20-100 cm. long, 17-70 cm. wide, short-acuminate, green above, slightly paler beneath, usually ternate-pinnate, the rachis sulcate and pubescent on upper side especially in the axils at base of pinnae, pale green; pinnae of the lowest pair manifestly larger than the others, reaching 2/3 of the entire length of the blade, spreading, 2- to 4-pinnati- parted, triangular-ovate, acuminate; pinnules subcoriaceous to thick-chartaceous, horizontally spreading, straight, oblong to linear-lanceolate, 3-6 mm. wide in the fertile, 5-8 mm. wide in the sterile ones, obtuse, usually glabrous above, thinly white- pilose at least along the costas beneath, slightly recurved on margins; sori marginal, continuous; indusia scarious, glabrous or nearly so, narrow.  Aug.-Oct. Sunny slopes in hills and mountains.

Hokkaido, Honshu, Shikoku, Kyushu; very com­mon.  Ryukyus, China, Korea, Sakhalin, s. Kuriles, Kam­chatka to Europe, and e. N. America