Rhizome stout, erect; scales pale brown, lanceolate. Stipes tufted, stramineous, 8-15 cm long, scaly at base; lamina ovate-lanceolate, tripinnatifid, 25-35 cm long, 10-15 cm wide; pinnae ascending, lanceolate-falcate, 10-15 cm long, 2.5 cm wide, petioles short; basal pinnae opposite or subopposite, medial pairs alternate; adaxial pinnules longer than abaxial; with spines on upper surface of rachis. Sori linear to round; indusia linear, curved or more often reniform, erose.
The Flora of Taiwan mentioned this species also occuring in S. Japan, but the Flora of Japan did not mention this species. The characters mentioned by Flora of Taiwan are wrong and be corrected here.
Distribution: Taiwan endemic.
Type: Taiwan, Mt. Arisan. Ito, S. n. Apr. 1914.
|Adaxial side of middle pinnae||Abaxial side of pinnae|