Japan Flora: Rhizomes short; fronds tufted, to 1 m. long, nearly glabrous or prominently pubescent; stipes 15-30 cm. long, pale green, often purplish; scales membranous, linear to narrowly lanceo­late, the upper ones 2-5 mm. long, the basal ones 2-3 mm. wide, 8-12 mm. long; blades herbaceous, broadly oblanceolate to oblong, usually broadest above the middle, 40-70 cm. long, 10-17 cm. wide, bipinnatiparted, abruptly long-acuminate, gradually narrowed at base; pinnae 15-22 pairs, alternate, spreading, linear-lanceolate, 6-10 cm. long, 1-1.7 cm. wide, long-acuminate, truncate at base, sessile, the lower few distant, ovate-deltoid, slighdy reflexed; pinnules elliptic to oblong, 3-5 mm. wide, rounded at apex, crenately toothed; sori 3-6 pairs on each pinnule, obliquely ascending; indusia oblong to lanceolate, 1-3 mm. long, solitary, rarely athyrioid and dipla­zioid. Wet slopes in mountains.

Hokkaido, Honshu, Shikoku, Kyushu; rather common. s. Kuriles, Sakhalin, Ko­rea, Manchuria, China, and Formosa.