Japan Flora: Plant slender, nearly glabrous; rhizomes filiform, creeping; stipes amote, dender, 1.5-4 cm. long; fronds 2-pinnatiparted; blades broadly lanceolate to linear-ob­long, 4-10 cm. long, 15-25 mm. wide, often narrowed at tip, the rachis winged; pinnae flabellate to rhombic-cuneate, shal­lowly parted, the lobes elliptic, obtuse, spinulose-toothed; ulti­mate segments 2-3 mm. wide; sori in upper part of blade; indusia oblong, the valves prominently toothed on margin. 

Reported to occur in Kyushu (Yakushima); rare. Formosa to India.