生活型

herb

形態特徵

• An annual, erect herb, branched above, 30–120 cm high, glabrous.
• Leaves odd-pinnate; leaflets numerous, 20–30 pairs, linear or oblong, obtuse at the apex, 10–15 mm long; stipules lanceolate, 1 cm long, produced at the base below their insertion, deciduous.
• Racemes axillary, 1–4-flowered; flowers yellow, 8 mm long; calyx 2-lipped, the upper lip entire or slightly 2-cleft, the lower 3-lobed; stamens in 2 sets of 5 each.
• Pods linear, straight or curved, 1–3 cm long, 4–8-jointed.

分布

• 台灣 : Spreading in the island on wet and open places, near paddy field as one of the green manure.
• 世界 : Pantropic.

引證標本

TAIPEI: Shilin, Huang 1246. KAOHSIUNG: Liukui, Huang 14467. HUALIEN: Tachiangkou, Tateishi et al. 1604

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: 192. .  (Fl. Taiwan 2nd edit.)