生活型

herb

形態特徵

• An annual herb, 30–60 cm high, pubescent; stems decumbent at the base.
• Leaves trifoliolate; leaflets obovate, 7–15 mm long, 5–15 mm wide, denticulate towards the apex; stipules acuminate, slightly dentate to entire.
• Flowers 1.5–2 mm long, yellow, in dense heads; peduncles exceeding the leaves; bracts setaceous minute; calyx 1.5 mm long, the teeth setaceous.
• Pods spineless, indehiscent, much curved, strongly veined, nearly glabrous, with only one seed.

分布

• 台灣 : Always in the open sandy seaside and open field island, at elevation below 100 m high, in the northern part.
• 世界 : In Europe and Asia;

引證標本

TAIPEI: NTU, Huang 13494; Paishawan, Huang 3349. HSINCHU: Industrial Garden, Huang 13441. HUALIEN: Hualien, Huang 1720.

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: 332. .  (Fl. Taiwan 2nd edit.)