Japan Flora: Rhizomes stout, erect or ascending; woolly hairs scanty, red- brown, early deciduous; sterile fronds evergreen, 1-1.5 m. long, tufted; stipes lustrous, brownkh, with a wing on each side near base; blades oblong-lanceolate, simply pinnate; pinnae 10-20 pairs, coriaceous, linear-lanceolate, 15-25 cm. long, 1-2 cm. wide, gradually long-acuminate, narrowed to a petiolelike base, coarsely acute-toothed, obliquely spaading, jointed at base, except the terminal one, lustrous, glabrous, slightly thickened and whitish on the margin, the costa and veinlets raised on both sides, the veinlets 1-4 times forked, parallel, obliquely spreading; fertile pinnae medial, linear-cylindric, 7-10 cm. long, dark brown. June-Dec. Wet places.

Hon­shu (Izu Prov.), Shikoku, Kyushu; Ryukyus, Formosa, s. China, Indochina, and Malaysia.