Japan Flora: Glabrous fern, scantily paleate on young stipes and rhizomes with thinly membranous, fugacious, ovate, acute scales 2-3 mm. long; rhi­zomes elongate, creeping, 4-5 mm. across, remotely leaved; sdpes 20-50 cm. long, straw-colored, brownish toward base, lustrous; sterile fronds broadly ovate-deltoid, 15-30 cm. long and nearly as wide, simply pinnate, contracted at tip to a short subacute point, the rachis prominently winged except near base, the pinnae 5-10 pairs, lanceolate, 10-20 cm. long, 1.5-3 cm. wide, obliquely spreading, shallowly and obtusely lobed, crenate or subentire, minutely scabrous on margin under mag­nification, lower 1 or 2 pairs gradually narrowed and sessile at base, broadly decurrent on the adjacent ones, green above, glaucous beneath; fertile fronds 10-20 cm. long, the pinnae erect, 3-7 cm. long, with sessile, berrylike, globular pinnules about 2 mm. across in 2 loose series, the pinnules with 3 or 4 thin-indusiate sori surrounded by the involute lobes of the pinnules.  Sept-Oct Wet places.

Hokkaido, Honshu, Shi­koku, Kyushu; rather common. Korea, Manchuria, s. Ku­riles, s. Sakhalin to e. Siberia. The typical variety occurs in N. America.