形態特徵

• Rhizome widely creeping, 2 mm thick; scales narrowly lanceolate, entire, black.
• Stipes 5--15 cm long, 1-2 cm apart, black and sparsely scaly at base; c. s. of stipe with 2 separate vascular strands running the entire length, uniting to form a single strand about midway up the blade; lamina simple or pinnately tapering to either end, 10-25 cm long, about 2 cm wide, margin entire or somewhat undulate; venation free, forking, rather hidden.
• Sori linear, medial, single or doubled.

分布

• 世界 : India, Ceylon, China, Japan, the Ryukyus.

引證標本

TAIPEI: Chihsinshan, DeVol 4484; Shintien, Kuo 1479. ILAN: Kueishantao, Kuo 1573. TAOYUAN: Lalashan, Huang 7667. MIAOLI: Tahu, Chen 51; Kuantaoshan, Kuo 805. TAICHUNG: Lishan, Feung 300; Tungshih, Simozawa 374. NANTOU: Kuantaochi, Kuo 2107; Chinshuikou, Huang 976. PINGTUNG: Shuanliu, Tsai 1381; Nanjenshan, Yang 128. TAITUNG: Is. Lanyu, Kuoh 4836; Chinshuiyin, Chuang 3446. HUALIEN: Lintienshan, Chao 65; Antong, Kao 6137.

參考文獻

• SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and KUO, CHEN-MENG, Flora of Taiwan, second edition 1: 444. 1994.  (Fl. Taiwan 2nd edit.)