形態特徵

• Rhizome stout, 6-10 mm across; scales dark brown, lanceolate-acuminate, clathrate, peltate at base.
• Stipes without scales, winged nearly to base, c. s. oval, with 2 large and 4 small bundles in arc; fronds usually with one (rarely 2-4) pairs of lateral lobes, these borne at or above middle of frond, (some fronds lack lobes), lower part of frond gradually narrowed to base of stipe; terminal lobe and simple fronds acuminate, 4-6 cm broad; margins entire, lateral veins visible, often zigzag.
• Sori small, round, oval and scattered or somewhat confluent.

分布

• 世界 : India, Ceylon, Indo-China, S. China, S. Japan, the Ryukyus.

引證標本

TAIPEI: Chingpingshan, Kuo 277; Wulai, Kuo 3719. TAOYUAN: Peichatienshan, Sasaki s. n. 1926. HSINCHU: Kwantaoshan, Suzuki 20087. TAICHUNG: Tungshih, Simozawa 628. NANTOU: Chitou, Huang 1496. KAOHSIUNG: Shanping, Kuoh 4036. PINGTUNG: Kuarusu, Matuda 132. TAITUNG:Changyen, Suzuki 19543; Is. Lanyu, Yamamoto s. n. 1947.

參考文獻

• SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and KUO, CHEN-MENG, Flora of Taiwan, second edition 1: 499. 1994.  (Fl. Taiwan 2nd edit., 台灣植物誌第二版)