形態特徵

• Rhizome stout, scales chestnut brown to black, 15-20 mm long, subulate.
• Stipes and rachises deeply grooved, densely covered with appressed fugacious, dark brown to black, subulate scales with dilated bases; stipes 15-55 cm long; laminae pentagonal, catadromous, tripinnate, 30-50 cm long, 20-25 cm wide, first basiscopic pinnule of lowest pinna much enlarged; pinnae alternate, petiolate; pinnules serrate, apices acute, acuricled on both sides at base; saccate scales on underside of costa few or none.
• Sori medial, all pinnae soriferous; indusia brown, margins entire, recurved.

分布

• 世界 : Japan, the Ryukyus.

引證標本

TAIPEI: Wulai, Suzuki 18745; Kuangyinshan, Fukuyama 222. ILAN: Suao, Masamune s. n. 1938; Yuanshan, Hsu 8401. TAOYUAN: Peichatienshan, Kuo 2675. HSINCHU: Chutong, Suzuki 20196. MIAOLI: Yangmeishan, Kuo 3603. TAICHUNG: Pahsienshan, Huang 1270. NANTOU: Chingshuikou, Huang 860; Sun Moon Lake, DeVol & Huang 1216. CHIAYI: Wufeng, Kuoh 3934. PINGTUNG: Mutanshan, Fukuyama 4509. TAITUNG: Chuanyen, Suzuki 19575. HUALIEN: Chingshuishan, Shimizu 11705.

參考文獻

• SHIEH,WANG-CHUENG, DEVOL CHARLES E. and KUO, CHEN-MENG. 1994. Flora of Taiwan, second edition 1: 327. (Fl. Taiwan 2nd edit.)