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DescriptionAnnual herbs (in ours). Leaves alternate, 2-pinnately lobed. Capitula in terminal panicles, radiate, heterogamous. Phyllaries in 2-3 series. Receptacular scales present. Disk florets sterile, ray florets fertile. Corolla of female florets small, subcircular; of disk florets narrowly funnel-shaped. Achenes of ray florets flattened, clasped by a phyllary and 2 lateral receptacular scales. Pappus of 2 recurved awns, forming an apparent rim to the achene.