Annual or perennial herb; leaves simple, alternate, entire or repand; petiolate or subsessile; flowers ebracteate, white, axillary, usually solitary, sometimes 2-3 together; calyx short, tubular, subentire or minutely 5-toothed, persistent, much shorter than fruit; corolla white or pale yellow, rotate, glabrous or pubescent; lobes-5, lanceolate, erect, spreading or reflexed; stamens 5, epipetalous, filaments bluish, attached near the base of corolla tube; anthers oblong, glabrous, short, dehiscing longitudinally; ovary globose or ovoid, 2-4 locular; ovules many; style filiform; stigma subcapitate; berry, globose or oblong with tapering end, many seeded; seeds discoid, glabrous, flattened.