形態特徵

• Caudex stout, erect.
• Sterile fronds 25 to 45 cm tall, 6 to 12 cm wide; stipes 4 to 14 cm long, without aerophores at base, c. s. tetragonal both at base and in upper section; winged on upper ridges; lamina deeply pinnatifid to nearly pinnate, the apex of frond pinnatifid, the lower 3 to 6 pairs of pinnae reduced to auricles; all pinnae adnate.
• Fertile fronds 25 to 50 cm tall; stipes 15 to 30 cm long; fertile pinnae straight, 2 to 10 cm long, ending in a distinct tip, the upper pairs adnate, the lower ones petiolate, the basal 6 to 8 pairs reduced to auricles.

分布

• 世界 : Japan, the Ryukyus, China, Vietnam and the Philippines.

引證標本

TAIPEI: Taranan, Suzuki 17913. ILAN: Nanhutashan, Kuoh 5499; Taipingshan, Shieh & Tsai 7429*. TAOYUAN: Peichatienshan, Kuo 2626. NANTOU: Chitou, Huang 1514. CHIAYI: Mt. Alishan, Hsu & Kuoh 6866. PINGTUNG: Tashulingshan, Kuo 1309. TAITUNG: Ramaramari, Kao 6049. HUALIEN: Chingshuishan, Nakamura 3682.

參考文獻

• SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and LU, CHIN-YI, Flora of Taiwan, second edition 1: 138. 1994.  (Fl. Taiwan 2nd edit.)