驱虫斑鸠菊 qu chong ban jiu ju

Conyza anthelmintica Linnaeus, Sp. Pl., ed. 2, 2: 1207. 1763; Ascaricida anthelmintica (Linnaeus) Sweet; A. indica Cassini, nom. illeg. superfl.; Baccharoides anthelmintica (Linnaeus) Moench; Centratherum anthelminticum (Linnaeus) Gamble; Phyllocephalum anthelminticum (Linnaeus) S. R. Paul & S. L. Kapoor; Serratula anthelmintica (Linnaeus) Roxburgh; Vernonia stenolepis Oliver.

Herbs, annual, up to 60 cm tall. Stems erect, robust, branched above, conspicuously canaliculate, glandular-pubescent. Leaves ovate, ovate-lanceolate, or lanceolate, 1.5-4.5 cm, membranous, both surfaces shortly pubescent, adaxially glandular, lateral veins 8-paired or more, veinlets fine and dense, reticulate, base attenuate into petiole, margin coarsely or sharply serrate, apex acute or acuminate. Synflorescences terminal, laxly corymbose. Capitula many, 15-20 mm in diam.; peduncle 5-15 mm, often bearing linear bracts, apically dilated, densely shortly pubescent and glandular. Involucre hemispheric; phyllaries 3-seriate, green, leaflike, subequal, outer slightly patent, 10-12 mm, pubescent and glandular, median oblong-linear, acute, inner oblong, somewhat membranous, acute; all bracts reflexed in fruit. Receptacle flat or rather concave, areolate. Florets 40-50; corolla purplish, tubular, 9-12 mm, with 6-7 mm slender tube and narrowly campanulate limb; lobes 5, lanceolate. Achenes black, cylindric, 4-5 mm, 10-ribbed, pubescent, glandular between ribs. Pappus 2-seriate, reddish; outer setae to 1.8 mm, scalelike, shiny, deciduous; inner setae 5.5-8 mm, rigid, flattened. Fl. Nov-Feb.

Grasslands, roadsides. SW Yunnan [Afghanistan, India, Laos, Malaysia, Myanmar, Nepal, Pakistan, Sri Lanka; Africa].