Unarmed annual herbs with sprawling or decumbent stems, glandular-hairy. Lvs alternate, pinnatifid to pinnate, petiolate. Infl. usually a lf-opposed monochasial cyme with up to c. 15 fls. Calyx 5-toothed to near base, markedly accrescent; lobes reflexed at fruiting. Corolla 5-lobed, rotate, yellow, plicate in bud. Stamens 5, inserted in corolla throat; filaments very short; anthers forming a conspicuous yellow cone around style, dehiscing longitudinally from apex; connective prolonged into a sterile beak. Stigma capitate. Fr. a berry, 2- or more celled. Seeds many, ellipsoid, compressed, of size moderate.