Infl. axillary and/or terminal, of small to large cymes, often umbelli-form, often corymbose, or fls solitary. Fls 5-(4)-merous, sts involucrate. Calyx cut to different levels, sinus acute to rounded. Corolla ± deeply lobed, us. campanulate to rotate, mainly white, sts veins purplish, rarely more fully coloured. Stamens < corolla. Ovary 1-loculed, sessile or very shortly stipitate, with 2 parietal placentae. Style short to obsolete; stigmas 2, recurved; seeds small, ∞, globose. Capsule very shortly stipitate or sessile, ellipsoid, 2-valved. Glab. herbs, perennial or occ. annual, with opp. lvs.