形態特徵

• Fronds dimorphic, the sterile narrowly oblong in outline, bipinnatifid to tripinnatifid; stipe slender, about as long as blade; pinnae usually alternate, rarely opposite, the ultimate segments usually 2-3 mm wide, rarely wider; fronds vary widely in size, usually 10-35 cm long; fertile fronds much longer than sterile.
• Sporangia globose, the annulus well developed; lip cells usually not well developed. Spore number 32.

分布

• 台灣 : Growing in paddy fields, marshes, and along slow flowing streams.
• 世界 : Widely distributed in the tropics of southeast Asia, the Pacific Islands, Madagascar, the West Indies, southern U.S.A., Central and South America.

引證標本

TAIPEI: Taipei, Huang 1261; Peitou, Simozawa 733. ILAN: Toucheng, DeVol 8125*. TAOYUAN: Suzuki 3380. TAICHUNG: Sun Moon Lake, Kudo 15524. NANTOU: Puli, Hsu 7548. TAINAN: Matao, Morimoto 279. PINGTUNG: Hsiaoliuchiu, Hosokawa 1606; Nanjenshan, Kuo 4149. TAITUNG: Kawakami 4791; Is. Lanyu, Huang 7518.

參考文獻

• DEVOL, CHARLES E. and SHIEH, WANG-CHUENG, Flora of Taiwan, second edition 1: 535. 1994.  (Fl. Taiwan 2nd edit.)