形態特徵

• Rhizomes long-creeping, 1.5-2.0 mm in diameter, covered with appressed, peltate, linear-lanceolate pale-brown scales.
• Stipe usually longer than lamina, 6-12 cm long; fronds dimorphic, pentagonal, variable in size, anadromous; sterile fronds often very small, not so deeply cut as fertile; lamina tripinnatifid in fertile fronds, usually between 4 cm long by 4 cm wide to 7 by 7 cm rarely up to 12 cm long by 10 cm wide; first basiscopic pinnule usually considerably enlarged; veins broad, free, forking; c. s. of lower stipe with 2 large bundles and one small bundle; stipe, rachis and lower surface of lamina with scattered acuminate scales.
• Indusia scale-like, 0.5-0.7 mm broad.

分布

• 世界 : the Philippines, the Ryukyus, Hongkong, Bonin Is. and Mariana Is.

引證標本

TAIPEI: Lussutang, Kao 48; Shihting, Kao 785*. TAICHUNG: Pahsienshan, Huang 1228. NANTOU: Chingshuikou, Huang, Kou & Kao 942. TAITUNG: Tawushan, Suzuki 7004. HUALIEN: Chingshuishan, Simizu & Kao 11706.

參考文獻

• SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and YANG, TAI-YING, Flora of Taiwan, second edition 1: 195. 1994.  (Fl. Taiwan 2nd edit.)