形態特徵

• Rhizome creeping; scales small, broadly lanceolate, entire; c. s. oval with about 6 bundles.
• Stipes distant, sparingly scaly at base with small narrowly lanceolate scales, c. s. with 2 round bundles; fronds somewhat dimorphic, sterile frond simple lanceolate, with or without basal lobes; fertile fronds with an elongated terminal pinna, similar to the 1-3 pairs of lateral pinnae; veins anastomosing.
• Sori linear, borne along costal and costular areolae; indusia linear, narrow, thin, opening towards costa or costule.

分布

• 台灣 : a rare species limit at 400-1000 m altitude of north broad-leaved forests, growing nearly the ridge or somewhat exposed pathsides.
• 世界 : Okinawa, South China, Hainan and Vietnam.

引證標本

TAIPEI: Tatungshan, Kuo 1396, Kuoh 1568, Hsu & Moo 683; Agyko, Suzuki 15355.

參考文獻

• CHIOU, WEN-LIANG, SHIEH, WANG-CHUENG and DEVOL, CHARLES E. 1994. Flora of Taiwan, second edition 1: 275. (Fl. Taiwan 2nd edit.)