Japan Flora: Fronds evergreen, glabrous, nearly all alike; rhi­zomes short, with dark purple-brown lustrous broadly linear scales about 3 mm. long; stipes 15-60 cm. long, pale strami- neous, sometimes somewhat brownish toward the base, ob­tusely 4-angled, sulcate on the upper side, glabrous, 2-25 mm. across; blades thinly coriaceous, 2(M0 cm. long, simply pin­nate, with 1-5 pairs of pinnae, the rachis not winged; lower pinnae usually 2- or 3-parted to -divided; fertile lobes broadly linear, 5-12 mm. wide, gradually long-acuminate, sterile at the tip, the sterile lobes linear-lanceolate, 10-25 cm. long, 1-2.5 cm. wide, acuminate, awn-toothed, green; veinlets reaching the cartilaginous margin of the sterile pinnae.

Honshu (Kanto Distr. and Echigo Prov. westw.), Shikoku, Kyushu; common. Widely distributed in the tropics and warm-temperate regions of the N. Hemisphere.