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Dinghushan | Family List | Compositae | Adenostemma

Adenostemma lavenia (L.) O. Ktze.

下田菊

Description from Flora of China

Herbs, annual, 30-100 cm tall. Stems erect, solitary, rigid, usually divaricately branched in upper part, white puberulent, glabrous in lower part. Leaves remote; basal leaves persistent or withered at anthesis; median leaves large; petiole narrowly winged, 0.5-4 cm; blade elliptic-lanceolate to elliptic or rhombic-elliptic, or broadly ovate to cordate, 4-12 × 2-5 cm, both surfaces sparsely puberulent or glabrescent, usually rather densely hairy on veins, base broadly or narrowly cuneate, margin crenate or incised, serrate, or doubly serrate, apex acute or obtuse; upper and lower leaves smaller, shortly petiolate. Capitula few, rarely many, small, in a lax or dense corymb or panicle; peduncle 0.8-3 cm, gray-white or ferruginous puberulent; involucre hemispheric, 4-5 × 6-8 mm, to 10 mm in diam. at fruiting; phyllaries 2-seriate, green, subequal, narrowly elliptic, thin, submembranous, outer phyllaries mostly connate, sparsely white villous, apex obtuse; corollas ca. 2.5 cm, viscid-glandular, pubescent. Achenes blackish brown when mature, oblanceolate, ca. 4 × 1 mm, glandular, sometimes densely tuberculate, contracted at base, apex obtuse; pappus elements clavate, ca. 4.1 mm, basally connate into a ring, fulvous viscid-glandular. Fl. and fr. Aug-Oct. 2n = 20.

This is an extremely variable and problematic taxon. Adenostemma lavenia is regarded by some authorities as distinct from A. tinctorium and A. viscosum, and to be endemic to Sri Lanka (cf. King & Robinson, Monogr. Syst. Bot. 22: 1-581. 1987), while others consider it to be pantropical.

Watersides, roadsides, forests and thickets on slopes, forest margins; 400-2300 m. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Nanhai Zhudao, Shaanxi, Sichuan, Taiwan, Xizang, Yunnan, Zhejiang [India, Japan, Korea, ?Myanmar, Nepal, Philippines, Thailand; probably widespread throughout SE Asia, Australia].

生活型: 草本

栽培植物: 野生

特征: 一年生、直立草本;

花期: 4--6月和10--12月

生境: 生于自然林下或湿润草地

用途: 全草入药,清热解毒、祛风消肿,治感冒高热、肺炎、风湿骨痛、疮疖、牙痛等

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


 

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