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 Zimbabwe: 4 cultivated taxa. Insects associated with this genus:
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No image of a cultivated species but there is an image of a native or naturalised species |
| Species | Content |
| oblongifolia (Hochst.) Benth. & Hook.f. ex B.D. Jacks. | |
| oppositifolia (Lam.) Codd | Description, Image |
| rotundata (Codd) Kupicha | Description, Image |
| schimperi (A.DC.) Schweinf. | Description |