Sub-scandent, leafy herb with
fibrous or tuberous roots. Leaves alternate, often radial. Flowers regular in
axillary or terminal panicles or clusters of 1-6 flowers. Stamens 3 with
bearded or naked filaments Staminodes 1-3. Ovary 3-locular, ovule 1 or more in
each locule. Fruit a capsule of 3 equal locules. Seeds 1-5 in each locule.