Herbs, suffrutices, shrubs or small trees. Leaves opposite. Inflorescence terminal but appearing lateral, 1-2-flowered. Flowers actinomorphic. Corolla salver-shaped; lobes overlapping to the left. Ovary of 2 carpels; disk composed of 2 glands. Fruit composed of 2 follicles (although one may abort); follicles cylindric, acute. Seeds oblong, black; testa rugose. Worldwide: 5 species in Arabia and tropical east and southern Africa Zambia: 1 taxon. The larvae of the following species of insect eat species of this genus: |
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