Annual or perennial, herbaceous bush; branches often purplish, leaves nearly glabrous, orbicular to ovate, cordate at base, 3-5 lobed, acuminate; petioles as long as or slightly longer than pedicels; stipules linear to lanceolate; flowers solitary, usually axillary, sometimes terminal; pedicels short, often glandular at tip; epicalyx lobes 3, very large, ovate to orbicular, deeply gashed with long acuminate teeth, auricled at base; calyx cupular, truncate or toothed; corolla pale yellow or white with purple tinge; petals obovate convolute, yellow with crimson spot in centre; staminal column erect; capsules ovoid, acuminate, fusiform, beaked, pitted; seeds black often, covered with readily separable cotton.