Japan Flora: Rhizomes slender, long-creeping, 2-2.5 mm. across, densely scaly toward the tip, the scales linear-lanceolate, gradually long-acuminate, 3-4 mm. long; fronds 10-40 cm. long, remote; stipes slender, straw- colored, broadly winged on upper half in longer ones, winged to the base in shorter ones; blades chartaceous-herbaceous, simple, broadly lanceolate to deltoid-lanceolate, 7-25 cm. long, 2.5-6 cm. wide, gradually acute to acuminate, cuneate at base, long-decurrent on the broadly winged stipe, entire or crispate; costa straw-colored to pale brown, the veins and veinlets very slender, slightly visible on both sides; sori spreading, parallel, rather close, 1-2.5 cm. long.                    

Kyushu (Osumi Prov. incl. Yakushima and Tanegashima). Ryukyus, Formosa, and China.