形態特徵

• Main stems creeping, glabrous, 5-30 cm long, rooting at intervals.
• Leaves of stems and branches dimorphic, the midribs present, stem leaves spaced farther apart than their width; lateral leaves unequal-sided, ovate, acute at apex, with margins nearly entire on minutely ciliate at base, pointing outwards; median leaves very unequal-sided ovate, caudate at apex, auricled on one side, pointing upwards; lateral leaves along branches contiguous, leaves at ends of branches imbricating; axillary leaves equal-sided, ovate, entire, acute at apex.
• Strobili borne on the sides and ends of lateral branches, 5-10 mm long; sporophylls monomorphic, narrowly ovate, ciliate, acuminate at apex, keeled.

分布

• 世界 : China, Japan, the Ryukyus, Malaya, the Philippines, Indonesia, Sumatra and New Guinea.

引證標本

TAIPEI: Chihsingshan, DeVol 9017; Tatungshan, Kao 6714. ILAN: Yuenyanghu, Kao 1518; Taipingshan, Kao 6795. TAOYUAN: Takuanshan, Shieh & Tsai 13350. TAICHUNG: Anmashan, Shieh & Tsai 3350. NANTOU: Chitou, Kao 6755; Fonghuangshan, Kuo 381. CHIAYI: Mt. Alishan, Kao 6777; Chushan, Hsu s. n. 1968. TAITUNG: Wushan, Hosokawa 5334. HUALIEN: Kueilin, Shieh & Chen 632*; Tayuling, Chuang & Kao 4418.

參考文獻

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