形態特徵

• Rhizome widely creeping, 3 mm thick; scales ovate-lanceolate, dark brown, clathrate; sparsely scaly on older part of rhizome.
• Stipes 1-3 cm apart; scales linear-lanceolate; fronds trilobed or simple, terminal lobe and simple fronds 1-3 cm broad; base of frond gradually narrowed to base or at least 1/2 way to base; margins entire; venation reticulate, distinct; costal scales smaller than stipe scales.
• Sori round or confluent in a row between the lateral veins.

分布

• 台灣 : Growing on rocks along and in mountain streams, often submersed.
• 世界 : India, Vietnam, Malaysia, China, the Ryukyus and the Philippines.

引證標本

TAIPEI: Kueishan, Kuoh 2473; Wulai, Kuo 2948. TAINAN: Kuantzuling, Morimoto s. n. 1942. HUALIEN: Taroko, Suzuki 9753.

參考文獻

• SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and KUO, CHEN-MENG. 1994. Flora of Taiwan, second edition 1: 502. (Fl. Taiwan 2nd edit.)