Plant: Annual or possibly short-lived perennial herb, generally ± glabrous; stem prostrate to erect, wiry to fleshy; plant varies in different phases Leaves: cauline; lower stipules generally entire; upper stipules deeply cut; leaflets generally obovate or wedge-shaped, sometimes narrower INFLORESCENCE: head-like, included or exserted from leaves, 0.5-2.5 cm wide, 1-many-flowered; involucre wheel-like, generally well developed Flowers: calyx 3-10 mm, tube 10-many-veined, all or some lobes generally > tube, bristle-tipped; corolla 3.5-16 mm, lavender to purple, tips generally white; 9 filaments fused, 1 free Fruit: legume, enerally indehiscent, but often breaking, short, plump; stalk-like base short or 0; Seeds 1-2 Misc: 50-2500 m.