Japan Flora: Rhizomes stout, as­ cending; fronds 50-100 cm. long; stipes stout, light green, grooved on upper side toward tip, naked on upper portion, with pale brown, lanceolate scales 8-10 mm. long, 1.5-2 mm, wide at base; blades narrowly ovate-oblong, 3- or 4-pinnati- parted, glabrous; pinnae 10-15 pairs, obliquely spreading, 12-17 cm. long, 3-6 cm. wide, 2- or 3-pinnate; pinnules firmly herbaceous, ascending, green, slightly paler beneath, the sterile ones narrowly rhombic-ovate, 15-30 mm. long, 6-10 mm. wide, subobtuse, cuneate at base, more or less irregularly ob­tuse-toothed, often parted in lower half, the fertile pinnules finely and pinnately cut, the segments ascending, broadly linear, 5-10 mm. long, 1.5-2 mm. wide, 1-veined, entire, the rachis flattened, green, with a slender raised midrib on upper side; sori solitary on the pinnules or teeth; indusia linear, 3-5 mm. long. 

Honshu (Hachijo Isl.); rare. Bonins and Formosa.