形態特徵

• Rhizome long-creeping; scales ovate-lanceolate, brown.
• Stipes distant, greenish-yellow (not purplish); scales at base of stipes larger and with wider base than on rhizome; fronds distant, pronouncedly dimorphic or more or less dimorphous, coriaceous; stipe slender, 2-10 cm long, narrowly winged upwards; lamina varing narrowly oblanceolate to almost linear; sometimes; in the case of the sterile fronds, oblanceolate, acuminate at the apex, gradually attenuated downwards, entire; the fertile fronds 15-30 cm long including the stipe, 7-15 mm wide, the sterile 10-20 cm or sometimes as much as 30 cm long including the stipe, 1-2.5 cm wide; costa beneath prominent, more or less raised and flattened; veins hidden.
• Sori usually confined to the upper half portion of the lamina, very oblique, arranged midway between the costa and the margin, usually slightly imbricate with the next above or sometimes arranged nearly end to end in a single row.

分布

• 世界 : Vietnam, Korea, China, Japan, the Ryukyus.

引證標本

TAIPEI: Tatungshan, Kuo 1451; Shihtin, Simozawa 657. ILAN: Nanhutashan, Kuo 483. TAICHUNG: Pahsienshan, Huang 1266; Lishan, Chuang & Kao 278. NANTOU: Kuantaochi, Kuo 2133; Sun Moon Lake, DeVol & Huang 1238. CHIAYI: Mt. Morrison, Tsann 40; Fenchihu, Kuo 1678. KAOHSIUNG: Shanping, Kuo 1956, Kuoh 4052. TAITUNG: Taitungshan, Yamamoto 79.

參考文獻

• SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and KUO, CHEN-MENG. 1994. Flora of Taiwan, second edition 1: 498. (Fl. Taiwan 2nd edit.)