Japan Flora: Rhizomes short; stipes 20- 40 cm. long, densely scaly; scales membranous, spreading to de­flexed, brown, broadly lanceolate to linear-lanceolate, 7-15 mm. long, those on the rachis 4-10 mm. long, entire; blades ovate to broadly so, 40-80 cm. long, 25-50 cm. wide, acuminate, 3-pin- natiparted to subtripinnate; pinnae broadly lanceolate to nar­rowly oblong-ovate, 5-8 cm. wide, acuminate, short-petiol alate; pinnules narrowly oblong-ovate, 2.5-4 cm. long, 1-1.2 cm. wide, obtuse, pinnately parted, entire to crenate or lobulate, sparingly pilose on both sides, more densely so on the costule above, the lowest posterior pinnule smaller than the adjacent ones; ultimate pinnules oblong, obtuse, crenate to lobulate; sori in 2 rows along the costule, sometimes with 1 or 2 irregular rows nearer the margin and a single sorus (sometimes 2-3) near the base of the segment; indusia membranous, reniform, lacinulate-ciliate, about 0.7 mm. across. Woods.

Honshu (s. Kanto through Tokaido to s. Kinki Distr. and westw.), Shikoku, Kyushu. Formosa.