形態特徵

• Stipes 10-30 cm long, scaly at base; lamina 15-40 cm long, gradually tapering to apex, basal pinnae somewhat shortened and sometimes a little deflexed; lateral pinna patent, lanceolate or falcate, 3-10 cm long, cut about 1/2 to costa, lobes rounded with a few teeth on apex.
• Sori linear, single or doubled; indusia brown, margin erose.
• A very common and variable fern, sometimes split into at least 3 or 4 species; this description is of <i>A. japonica</i> sensu stricta and does not cover all the variants which occur on Taiwan.

分布

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

引證標本

TAIPEI: Kueishan, Kuo 1598*; Chihsinshan, Kao 4462. ILAN: Toucheng, DoVol 8124; Nanshan, Huang & Kao 2434. TAOYUAN: Peichatienshan, Tsai 4326. MAIOLI: Nanchuan, Hsu 12354. TAICHUNG: Kukuan, Kuo 866; Pahsienshan, Simozawa 356. NANTOU: Chitou, Huang 1469; Sun Moon Lake, Kuoh 3886. CHIAYI : Mt. Alishan, Hsu & Kuoh 6902. TAINAN: Kuantzuling, Morimoto 721. KAOHSIUNG: Shanping, Yang 84, Shieh & Tsai 6636; Tengchih, Kuo 732. PINGTUNG: Nanjenshan, Kuoh 4105. TAITUNG: Is. Lanyu, Huang & Kao 6244; Taoli, Yamamoto 202.

參考文獻

• SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and KUO, CHEN-MENG, Flora of Taiwan, second edition 1: 422. 1994.  (Fl. Taiwan 2nd edit.)