形態特徵

• Rhizome erect; scales rusty-brown, lanceolate.
• Stipes 20-35 cm long, green, grooved on upper side; upper stipe and rachis covered with very small, narrow linear scales and sparsely covered with longer lanceolate brown scales; lamina lanceolate, bipinnate, 50-60 cm long; pinnae linear-lanceolate, acuminate, 12-15 cm long, short petiolate; pinnules oblong, sessile, 15-20 mm long, obtuse, margins sinuate.
• Sori linear, straight, single or double; indusia thin, entire.

分布

• 世界 : the Ryukyus.

引證標本

TAIPEI: Chitzu, Sasaki s. n. 1932; Habun, Suzuki 16814.

參考文獻

• SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and KUO, CHEN-MENG, Flora of Taiwan, second edition 1: 441. 1994.  (Fl. Taiwan 2nd edit.)