Annual or perennial herbs or suffrutices. Inflorescence axillary, consisting of umbel-like monochasical cymes. Primary bracts leaf-like. Calyx 5-lobed; lobes subequal or one lobe longer. Corolla 2-lipped, enclosed within 2 opposite bracts, resupinate, with clearly twisted tube; lip in upper position 3-toothed with indistinct rugula; lip in lower position entire or emarginate. Stamens 2; anthers 2-thecous, apiculate, exserted; staminodes 0. Ovary 2-locular. Worldwide: c. 175 species in tropical and warm areas Caprivi: 7 cultivated taxa. |
|