Japan Flora: Rhizomes creeping; stipes 30-50 cm. long, pale green to straw-colored, smoodi in upper part, sparsely scaly toward the base; scales membranous, lanceolate, 5-8 mm. long, 1.5-3 mm. wide, acuminate^ entire; blades broadly lanceolate to narrowly ovate-oblong, 50-70 cm. long, 17-30 cm. wide, sometimes slightly narrowed at base, simply pinnate, glabrous, green above, slightly glaucous beneath; pinnae 公-13 pairs, thinly membranous, spreading, equilateral, oblong- to linear-lanceolate, 10-15 cm. long, 15-20 mm. wide, or the sterile ones to 3 cm. wide, gradually acuminate-tailed, truncate to very broadly cuneate at base, sessile, sometimes obsoletely auriculate at base, undulate to crenate; veins spread­ing, slender, forked near base and forming 4 or 5 rows of oblong to narrowly ovate somewhat 4-angled areolae on each side of the pinnae; sori linear-oblong to -lanceolate, on the lower half of the veins; indusia thinly membranous, linear- lanceolate, obtuse at both ends, nearly straight to very slighdy arcuate. Dark, damp woods.

Honshu (Ugo Prov., s. Kanto Distr. and westw.), Shikoku, Kyushu. China.