生活型

vine

形態特徵

• A herbaceous vine; stem 2 mm thick, pubescent, the internodes 7–17 cm long.
• Leaves trifoliolte, oblong elliptic to ovate, the apex obtuse, mucronate, the base obtuse to rotundate, 5–5.5 cm long, 2.5–3.5 cm wide, dark green and glabrous above, pale and densely pubescent below, the veins weakly raised above, prominently raised below, primary veins 6–7 pairs, obliquely ascending; petiole 2–5 cm long, pubescent; stipules 3 mm long, broadly ovate, pubescent; stipels persistent, pubescent.
• Flowers cleistogamous; calyx tube 3–4 mm long, the lobe narrowly lanceolate, 4–5 mm long. Pods pale brown, slightly curved, biconvex, subquadrangular, 4-costate, 3 cm long, 8–9 mm wide, enclosed in the calyx with base of fruit;
• Pods pale brown, slightly curved, biconvex, subquadrangular, 4-costate, 3 cm long, 8–9 mm wide, enclosed in the calyx with base of fruit; seeds elliptic, slightly compressed, 3 mm long, 2 mm wide, 4–5 per pod.

分布

• 台灣 : A newly immigrant, and growing among shrubs or open grasslands.
• 世界 : Distributed in the Central America, South America, W. India and tropical Africa.

引證標本

PINGTUNG: Hengchun, Lung-luan Tan, Yang 3933.

參考文獻

• Huang, S. F. & T. C. Huang, Taiwania 32(1): 11-118. 1987.
• Huang, S. F. & T. C. Huang, Flora of Taiwan, second edition 3: 214. .  (Fl. Taiwan 2nd edit.)