Japan Flora: Rhizomes creeping, very thinly scaly; fronds glabrous, 30-70 cm. long; stipes usually shorter than the blades, pale green to straw-green, purplish, sparsely scaly; scales thinly membranous, narrowly to broadly lanceo­late, sometimes narrowly ovate, 4-5 mm, long, pale brown, entire, deciduous; blades membranous, deltoid-ovate to oblong- ovate, 25-40 cm. long, 17-30 cm. wide, bipinnatiparted, or sometimes in lower part bipinnate, grayish green, slightly brownish when dried; pinnae 6-9 pairs, nearly opposite, spreading, broadly lanceolate, 2.5-5 cm. wide, sessile or sub， sessile, acuminate; pinnules oblong to ovate-oblong, 2-3.5 cm. long, 5-10 mm. wide, obtuse to rounded or subacute, usually decurrent on the broadly winged rachis, obsoletely toothed, entire or sometimes lobulate to parted; sori linear, naked, 1-3 mm. long, often forked.                    

Honshu (Ugo Prov., Kanto Distr. and westw.), Shikoku, Kyushu; rather common. s. Korea, Formosa, and China.

var. pilosellum (H. Ito) Ohwi. With multicellular hairs on stipes, rachis, and on the underside of blade. Honshu, Shikoku, Kyushu.