Description from Flora of China
Herbs, annual [or perennial]. Leaves alternate, pinnatifid or pinnatisect. Capitula small, globose, disciform, in corymbiform-paniculiform or nearly racemiform synflorescences. Receptacles cup-shaped or funnel-shaped peripherally (bearing marginal florets), slightly convex centrally (bearing disk florets), non-alveolate, naked. Involucre hemispheric; phyllaries 2- or 3-seriate, subequal, oblong to lanceolate, margin scarious. Marginal florets female, fertile, many seriate, purple, tube filiform, lamina none (outer) to short, narrowly funnelform (inner), 2-lobed; disk florets bisexual, usually functionally male, few, limb funnelform, 5-lobed; anther base truncate, appendages triangular; style branch tips linear-lanceolate, of disk florets simple or cleft. Achenes minute, oblong to ± fusiform, slightly flattened, not ribbed, apex ± coroniform. Pappus absent.
Three species: tropical Asia; one species in China.
(Authors: Chen Yilin (陈艺林 Chen Yi-ling); Luc Brouillet)