形態特徵

• Main stems erect, up to 55 cm tall, glabrous, without leafy branches on the lower part, decumbent at base.
• Leaves at the base of stems all alike, equal-sided, ovate, entire, acute at apex, the midribs distinct, pointing upwards; leaves on the stems below the branches dimorphic, unequal-sided, ovate, ciliate, cuspidate at apex, auricled on one side, pointing outwards; lateral branch leaves unequal-sided, ovate, minutely ciliate, acute at apex, pointing outwards; median leaves smaller, very unequal-sided, ovate, ciliate, cuspidate at apex, the midribs prominent; axillary leaves equal-sided, ovate, ciliate, acuminate at apex, not auricled.
• Strobili 5-15 mm long, terminal on branchlets; sporophylls monomorphic, ovate, ciliate, acuminate at apex.

分布

• 台灣 : Growing in partial shades of valleys or hillsides.
• 世界 : China, Vietnam, the Ryukyus and the Philippines.

引證標本

TAIPEI: Kuanyinshan, Chuang 4606; Tatungshan, Hsu 5192. ILAN: Nanhutashan, Kuo 482. HSINCHU: Shihtoushan, Kuo 835. TAICHUNG: Lishan, Feung 304. NANTOU: Lushan, Matuda 231. TAITUNG: Is. Lanyu, Kao 7546; Lutao, Chuang 2289. HUALIEN: Lintienshan, Feung 957; Tienhsiang, Shimizu 10562.

參考文獻

• TSAI, JINN-LAI and SHIEH, WANG-CHUENG. 1994. Flora of Taiwan, second edition 1: 53. (Fl. Taiwan 2nd edit.)