Annual, branched herb; basal leaves cordate or rounded, cauline leaves ovate, oblong or lanceolate, crenate to dentate; stipules large, ovate-oblong, adnate to the middle point, persistent; flowers irregular, 5-merous, showy, variously coloured, spurred; sepals 5, unequal or equal, imbricate, produced at the base; petals 5, erect or spreading, lower largest spurred at the base; stamens-5, anthers free or connate, filaments short, broad; connective broad, produced beyond the cells; ovary sessile, 1-celled, many ovuled on 3 parietal placentas; style simple; stigma capitate, truncate or cupular; capsule 3-valved; seeds many, ovoid, albuminous.