Japan Flora: Fronds evergreen; rhi­zomes short-creeping, with dark brown linear scales 3-3.5 mm. long; stipes tufted, 20-40 cm. long, yellow-brown, subtrapezoid or 3-angled, lustrous, 2-2.5 mm. across near base, smooth, ob­tuse on the dorsal angle; blades chartaceous, lanceolate to nar­rowly oblong-ovate, 25-40 cm. long, 8-15 cm. wide, bipinnati-parted, witli a large terminal pinna, the rachis yellow-brown, 3-angled, lustrous, smooth; lateral pinnae 3-7 pairs, narrowly deltoid, 5-10 cm. long, sessile or subscssile, pinnatiparted or unlobed on anterior side, the acutely toothed tip 1-3 cm. long, the terminal pinna triangular-lanceolate, 10-20 cm. long, 3-5 cm. wide, regularly pinnatiparted with a linear acutely toothed tip, the costas on each side above with a sparsely scabrous ele­vated white line; pinnules linear- to oblong-lanceolate, 1-3 cm. long, 4-5 mm. wide, obtuse to acute, slightly falcate.           

Hon­shu (s. Kanto Distr. and westw.), Shikoku, Kyushu. Ryukyus and Formosa.