Japan Flora: Rhizomes long-creeping, rather stout, grayish, sparsely scaly, the fronds remote, the scales ascending, narrowly deltoid-lanceolate, 4-5 mm. long, acumi­nate, ciliolate, with oblong to elliptic dark brown cell walls, pcltately attached; stipes 10-20 cm. long, straw-colored, naked, rather stout, lustrous, nearly terete; blades chartaceous-coria­ceous, usually ovate, 10-30 cm. long, pinnately parted or the small ones sometimes simple and lanceolate, nearly truncate and abruptly narrowed at base, glabrous on both sides, some­what lustrous on upper side; costa and costules on lobes prominently raised beneath, the veins and veinlets invisible on both sides; segments linear-lanceolate to lanceolate, 8-15 cm. long, 2-3 cm. wide, acuminate to acute, entire, slightly re며 curved on margin, the terminal one largest (in ours), the lateral ones obliquely spreading; sori round to elliptic, 3-5 mm. across, depressed, in a single row on each side of the costa, or sometimes in a double row. 

Kyushu (Tsushima, accord­ing to H. Ito). Ryukyus, Formosa, s. China to Polynesia, Malaysia, Australia, India, and tropical Africa.