形態特徵

• Very large terrestrial ferns; rhizome erect or ascending; scales narrowly linear, attenuate, denticulate, pale brown with black margins.
• Stipes approximate, green, stout, 30-55 cm long, deeply grooved, scaly on lower half; lamina bipinnate to tripinnatifid, 50-80 cm long, all veins free, rachis groove open to rachilla grooves; pinna and pinnules petiolate, pinnules lanceolate, equal at base, lobes rounded at apex, margins entire; considerable variation between size and cutting of fronds of young and older plants.
• Sori linear, borne on basal half of veinlets, usually single except on the acroscopic basal veinlet.

分布

• 台灣 : Indo-China, India, S. China, Japan, the Ryukyus, the Philippines and south to Malaysia.

引證標本

TAIPEI: Chihsinshan, DeVol 4459; Kuanyinshan, Kao 125; Wulai, Chuang 2144. ILAN: Kueishan, Kuo 335*; Wushurbyi, Tsai 8078. TAOYUAN: Peichatienshan, Kuo 2534. MIAOLI: Yangmeishan, Kuo 3595. TAICHUNG: Wushikeng, Shieh & Tsai 560; Tungshih,, Simozawa 385. NANTOU: Chitou, Huang 1466; Sun Moon Lake, DeVol 1229; Meiyuen, Kao 6671. CHIAYI: Fenchihu, Kuo 1631. KAOHSIUNG: Shanping, Kuo 1919. PINGTUNG: Maanchou, Shieh & Tsai 6565; Nanjenshan, Hsu 8310. TAITUNG: Mt Taito, Yamanoto s. n. 1929; Kuanshan, Shieh & Tsai 1873. HUALIEN: Kinebodaichi, Sasaki s. n. 1934.

參考文獻

• SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and KUO, CHEN-MENG, Flora of Taiwan, second edition 1: 436. 1994.  (Fl. Taiwan 2nd edit.)