Japan Flora: Rhizomes short, with linear-lanceolate black-brown pale margined scales 2-2.5 mm. long; fronds tufted, the sterile shorter than the fertile; stipes slender, trigonous, 0.5-1 mm. across, ch效tnut-brown, 2-8 cm. long in the sterile fronds, about 12 cm. long in fertile; blades ternately or pedately 3- to 5-foliolate; sterile pinnae thinly chartaceous, linear, 3-13 cm. long, 3-6 mm. wide, the terminal pinna 10-20 cm. long, acutely toothed, gradually narrowed at both ends, subsessile, glabrous but with scattered hairlike scales along costas on both sides while young; veins simple or once forked, not reaching the margin; fertile pinnae 2-3 mm. wide, entire.  Calcareous rocks in mountains.

Honshu (Mount Omine in Yamato Prov.); rare.