Annual to perennial herbs; rhizome present or absent; stern mostly present. Leaves ovate-triangular or reniform, cordate, serrate, crenate, stalked, sometimes winged. Stipules lanceolate-ovate, entire, dentate or fimbriate. Flowers zygomorphic, peduncle bracteolate, bracteoles 2, oppoiste or subopposite. Sepals 5, persistent. Petals 5, lateral larger than others, forming a spur. Anthers connate, encircling the ovary, filaments short, broad and distinct, the two lateral end up in the corolla spur. Ovary sessile; style mostly curved at base, thickened or attenuate above; stigma lobed, straight or beaked. Fruit a 3-valved capsule, dehiscing loculicidally. Seeds rounded-ovate, smooth, shiny.