Japan Flora: Rhizomes creeping, firm; stipes light brown, 40-60 cm. long, rather prominently scaly, dark brown near base; scales linear to broadly so, 5-10 mm. long, about 1-1.5 mm. wide, spinulose; blades chartaceous, broadly deltoid- lanceolate to narrowly ovate-deltoid, 40-50 cm. long, 20-25 cm. wide, acuminate, not narrowed at base, bipinnatiparted (in ours); pinnae 12-14 pairs, spreading, acuminate, equi­lateral, 10-20 cm. long, 2.5-3 cm. wide, petiolulate, truncate to slightly cordate at base, pinnately parted to deeply lobed, the upper ones smaller and decurrent on the rachis; pinnules ob­long to narrowly ovate-oblong, 5-8 mm. wide, rounded to obtuse or acute, crenate-toothed; sori 8-14, median or slightly  costal, linear, obliquely ascending, straight; indusia 2-4 mm. long, nearly equal in length, narrow.      

Kyushu (Yakushima); rare. Ryukyus, Formosa, and Indochina.