形態特徵

• Rhizomes long-creeping, 2-3 mm thick, short-pilose and sparsely scaly.
• Fronds distant, 0.5-2 cm apart, more or less dimorphic, the fertile usually narrower and longer; stipes 7-9 cm long, fertile ones to 25 cm, scaly at base, the scales dark brown, linear-lanceolate, 3 mm long; laminae lanceolate, trifoliolate, the two lateral pinnae smaller, subsessile, oblong to lanceolate, very variable in size, 1.5-10 cm long; terminal pinnae large, 10-20 cm long, 2-4.5 cm wide, acuminate, cuneate to rounded at base; lateral veins oblique and straight, joined laterally by several rows of cross-veins, each with a single excurrent vein extending outward to the next cross-veins, not in distinct sori, sometimes also on the surface of the areoles, without indusia.

分布

• 台灣 : Growing in dense forests, especially along streams.
• 世界 : tropical Asia and Australia.

引證標本

TAIPEI: Ayu, Kao 3040. ILAN: Kueishantao, Kuo 329. NANTOU: Lienhuachih, Shieh & Tsai 1321; Sun Moon Lake, DeVol 6058. PINGTUNG: Nanjenshan, Kuoh 4133, Shieh & Tsai 731. TAITUNG: Is. Lanyu, Yang 250.

參考文獻

• TSAI, JINN-LAI and SHIEH, WANG-CHUENG, Flora of Taiwan, second edition 1: 397. 1994.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)