形態特徵

• Rhizome creeping; scales abundant, dark brown, lanceolate, entire; c. s. with 2 large bundles and 4 smaller ones.
• Stipes distant, about as long as lamina, persistent, dark brown, sparingly scaly at base, grooved above, 15-30 cm; c. s. oval with 2 bundles connected by sclerenchyma tissue; fronds pinnate, glabrous, subcoriaceous; pinnae adnate, usually falcate, margins entire, median pairs longest, usually 3-5 cm long, lower 3 pairs very much shortened (0.5-2 cm long); venation hidden, with costal areoles, ultimate veinlets free, often forking.
• Sori costal continuous, not reching apex of pinnae and not quite reaching base; indusia brown, opening towards costa.

分布

• 台灣 : Growing on wet shaded places in middle altitude mountains.
• 世界 : W. China, India.

引證標本

TAIPEI: Kankou, Simozawa s. n. 1932. ILAN: Taipingshan, Suzuki 1017. HSINCHU: Yuanyang Lake, Kuo 1523. TAOYUAN: Peichatienshan, Kuo 2621*.TAICHUNG: Pahsienshan, Chuang, Kuo & Kao 2759. CHIAYI: Mt. Alishan, Sasaki 550. TAITUNG: Kuehu, Kuo 106. HUALIEN: Tarokotaisan, Sasaki s. n. 1933.

參考文獻

• CHIOU, WEN-LIANG, SHIEH, WANG-CHUENG and DEVOL, CHARLES E., Flora of Taiwan, second edition 1: 266. 2002.  (Fl. Taiwan 2nd edit.)