Japan Flora: Rhizomes short-creeping; stipes 20-50 cm. long, brownish, densely scaly; scales on lower half of the stipes broadly lanceolate to narrowly ovate, 7-10 mm. long, entire, dark chestnu t-brown, lustrous, spreading to slightly deflexed, those on upper half of stipe and those of the rachis linear to linear-lanceolate, 3-8 mm. long; blades ovate, 40-75 cm. long, acuminate, 3-pinnatiparted; pinnae 3-10 pairs, narrowly oblong-ovate to broadly lanceolate, equilateral, ob­liquely spreading, caudate-acuminate, short-petiolulate; pin­nules narrowly oblong, obtuse in the smaller ones, narrowly ovate-oblong, 2-6 cm. long, 1-2.5 cm. wide, short-acuminate in larger ones, pinnatilobed, sometimes slightly whitish beneath. nearly glabrous on both sides, sometimes with a few scattered fleshy hairs on upper side, the costules above with an elevated ridge on each side, the lowest pinnule largest, sometimes bipin­na tiparted; ultimate pinnules oblong to oblong-lanceolate, 5-20 mm. long, 2-7 mm. wide, obtuse, crenate; sori nearer the costa (or to the veins) of the pinnules; indusia obsolete or absent.             

Honshu (Izn, Echizen, and Kii Prov.), Shikoku, Kyushu