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Dinghushan | Family List | Compositae | Bidens

Bidens pilosa L.

三叶鬼针草

Description from Flora of China

Bidens chilensis Candolle; B. pilosa var. minor (Blume) Sherff; B. pilosa f. radiata Schultz Bipontinus; B. pilosa var. radiata (Schultz Bipontinus) J. A. Schmidt; B. pilosa f. rubiflora S. S. Ying; B. sundaica Blume var. minor Blume; Kerneria tetragona Moench, nom. illeg. superfl.

Annuals. Stems 30-180 cm tall, glabrous or very sparsely pubescent in upper part. Petiole 10-30(-70) mm; leaf blade either ovate to lanceolate, 30-70(-120) × 12-18(-45) mm, or pinnately 1-lobed, primary lobes 3-7, ovate to lanceolate, (10-)25-80 × (5-)10-40 mm, both surfaces pilosulose to sparsely hirtellous or glabrate, bases truncate to cuneate, ultimate margin serrate or entire, usually ciliate, apices acute to attenuate. Synflorescence of solitary capitula or capitula in lax corymbs. Capitula radiate or discoid; peduncles 10-20(-90) mm; calycular bracts (6 or)7-9(-13), appressed, spatulate to linear, (3-)4-5 mm, abaxially usually hispidulous to puberulent, margins ciliate; involucres turbinate to campanulate, 5-6 × 6-8 mm; phyllaries (7 or)8 or 9(-13), lanceolate to oblanceolate, 4-6 mm. Ray florets absent or (3-)5-8; lamina whitish to pinkish, 5-15 mm. Disk florets 20-40(-80); corollas yellowish, (2-)3-5 mm. Outer achenes red-brown, ± flat, linear to narrowly cuneate, (3-)4-5 mm, faces obscurely 2-grooved, sometimes tuberculate-hispidulous, margin antrorsely hispidulous, apex truncate or somewhat attenuate; inner achenes blackish, ± equally 4-angled, linear-fusiform, 7-16 mm, faces 2-grooved, tuberculate-hispidulous to sparsely strigillose, margin antrorsely hispidulous, apex attenuate; pappus absent, or of 2 or 3(-5) erect to divergent, retrorsely barbed awns (0.5-)2-4 mm. Fl. year-round. 2n = 24, 36, 48, 72.

Roadsides, fields, villages; below 2500 m. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Henan, Hubei, Hunan, Jiangxi, Liaoning, Shaanxi, Shandong, Shanxi, Sichuan, Taiwan, Xizang, Yunnan, Zhejiang [tropical and subtropical regions].

生活型: 草本

栽培植物: 野生

特征: 一年生草本;1回羽状复叶,小叶3--5片(-7片),舌状花白色

花期: 1--5

生境: 生于旷野草地

用途: 全草入药,清热解毒、活血散瘀、利尿、止泻,治感冒发热、腹泻、风湿骨痛、跌打、蛇虫咬伤、疮疖等;又作杀虫农药

门中名: 种子植物门

亚门中名: 被子植物亚门

纲中名: 双子叶植物纲

中文别名: 虾钳草(高要)


 

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