Tendrillar herbs; base woody. Leaves exstipulate; alternate bipinnate; leaflets inciso-dentate. Flowers zygomorphic, in few-flowered, axillary cymes; cymes subtended by a pair of tendrils. Sepals 4, imbricate, 2 outer ones smaller. Petals 4, in pairs. Disc unilateral. Stamens 8, filaments unequal, free or connate at the base. Ovary excentric, sessile or subsessile, 3-locular, with one ovule in each locule. Fruit a loculicidal capsule, membranous, inflated, 3-valved. Seeds usually arillate at the base.