Japan Flora: Rhizomes slender, long-creeping, short-pilose, sparsely scaly; fronds slender, deciduous; stipes slender, 10-30 cm. long, straw-colored, sparsely pilose to nearly glabrous, sparsely scaly; scales thinly membranous, lanceolate to linear- lanceolate, 2-4 mm. long, 0.5-15 mm. wide, long-attenuate; blades thinly herbaceous, deltoid, 10-18 cm. long, nearly as wide, acuminate, vivid green, sparsely pilose on both sides, prominently so on the costas and upper side of rachis, the rachis sparsely scaly beneath; pinnae lanceolate, 1-2.5 cm. wide, acuminate, sessile, pinnatiparted, adnate to the rachis and auriculate, except the two lowest pinnae which are sessile and not adnate on the rachis; pinnules oblong, 3-6 mm. wide, rounded at apex, coarsely crenate to subentire, the veins pin­nate, the veinlets simple or forked; sori submarginal, in 2 series on the segments, orbicular; indusia absent.  Coniferous woods.

Hokkaido, Honshu (Kinki Distr. and eastw.), Shi­koku, Kyushu; common northw. Korea, China, Formosa, Himalayas, Siberia to Asia Minor and Europe, and N. America.