Japan Flora: Rhizomes short-creeping, 5-7 mm. across, densely scaly, the scales membranous, spreading, deltoid-lanceolate, 5-7 mm. long, filiform at the tip, clathrate; fronds 30-60 cm. long; blades herbaceous, pinnately parted or rarely simple, narrowly oblanceolate, 3-5 cm. wide, abruptly acuminate, gradually narrowed from about the middle, long- decnrrent on the stipe, glabrous except for a few scattered scales toward the base while young, entire or undulate; seg­ments 1-3 pairs, spreading, lanceolate to ovate, abrupdy acute to obtuse; costules rather slender, straw-colored; sori round to oblong, or sometimes short-linear, 1-1.5 mm. across, scattered on underside of blade.  Moist places along streams.

Kyushu (Yakushima and Tanegashima in Osumi, and Koshiki in Satsuma Prov.). Ryukyus, Formosa, China to Indochina.