形態特徵

• Rhizome erect, covered with stipe bases; scales pale brown becoming dark brown, lanceolate.
• Stipes 20-35 cm long, stramineous, bisulcate, dark and scaly at base; lamina deltoid, 20-40 cm long by 18-30 cm wide, texture thin, bipinnate-tripinnate; pinnae petiolate, alternate, 9-18 cm long; basal pairs of pinnules petiolate; segments of pinnules on large fronds free and sessile, segments on smaller fronds cut about 1/2 way to costa; upper surface with spines along rachilla grooves and costae.
• Sori costal, borne at the base of fork of a veinlet, 1-2 mm long; indusia usually straight, thin, brown, entire or slightly erose.

分布

• 世界 : southern Japan.

引證標本

TAIPEI: Ayu, Suzuki 18504. HSINCHU: Chutung, Suzuki 20751. NANTOU: Wanghsiang, Tsai 10394; Chitou, Cheng 544. TAITUNG: Kusuhara, Suzuki 19649.

參考文獻

• SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and KUO, CHEN-MENG, Flora of Taiwan, second edition 1: 425. 1994.  (Fl. Taiwan 2nd edit.)