Japan Flora: Rhizomes creeping; stipes 35-40 cm. long, sparsely scaly and blackish at base; scales membranous, lanceolate, 5-7 mm. long, 1-15 mm. wide, entire, fuscous; blades membranous, deltoid, 55-65 cm. long, 40-45 cm. wide, acuminate, glabrous, 3-pinnati- parted; pinnae 7-10 pairs, equilateral, obliquely spreading, broadly lanceolate, acuminate, to 40 cm. long; pinnules 4-6 cm. long, 15-20 mm. wide, long caudate-acuminate, pinnatiparted; pinnules elliptic to oblong, 3.5-5 mm. wide, obtuse to acute, rather remote, toothed; sori narrowly oblong, about 2 mm. long, subcostular; indusia thin, entire, brownish. 

Honshu (Bitchu and Totomi Prov.).