散生千里光 san sheng qian li guang

Herbs, annual. Stems erect, 20-40 cm tall, branching from base or only in upper part, sparsely pubescent or subglabrous. Leaves sessile; blade oblanceolate to oblong, 4-6 × 0.5-3.5 cm, both surfaces sparsely pubescent to glabrous, lower ones attenuate into a petioloid base, middle ones dilated with entire or denticulate subamplexicaul auricles at base, pinnatipartite with 6-8 unequal, oblong-lanceolate or oblong, obtuse, entire or remotely denticulate lateral lobes to pinnatifid or entire, apex obtuse. Upper leaves linear or linear-lanceolate, gradually smaller. Capitula radiate, few to numerous, arranged in lax terminal sometimes subumbelliform corymbs; peduncles 0.5-2.5 cm, slender, glabrous; bracteoles 1-3, linear-subulate. Involucres subcampanulate, 4-5 × 2-3 mm, inconspicuously calyculate; bracts of calyculus 2 or 3, linear-subulate, minute; phyllaries 14 or 15, linear, 0.3-0.5 mm wide, herbaceous, glabrous, margin broadly hyaline, apically acute and sparsely puberulent. Ray florets ca. 12; corolla tube ca. 2 mm; lamina yellow, oblong, minute, 1-1.5 mm, 3-denticulate. Disk florets many; corolla yellow, ca. 3 mm, with ca. 1.7 mm tube and funnelform limb; lobes ovate-triangular, ca. 0.4 mm, apically acute, papillose. Anthers ca. 0.6 mm, basally obtusely subauriculate, appendages ovate-oblong; antheropodia dilated toward base. Style branches ca. 0.4 mm. Achenes cylindric, ca. 2.5 mm, densely shortly pubescent. Pappus white, ca. 3 mm. Fl. Apr-Jun.

River margins, pastures; sea level to 600 m. Chongqing, Guangdong, Hubei, Sichuan, Zhejiang [Thailand].