Perennial herbs or woody climbers. Flowers zygomorphic. Perianth zygomorphic; the base swollen, the upper part narrower, ± cylindric (tube) with single, entire lobe (limb), rarely 0 or 3-lobed. Stamens usually 6, in one whorl, connate with the stylar column. Fruit a septicidal capsule. Worldwide: 120 species, widely distributed in the tropics and subtropics; some in warm temperate regions. DRC: 8 taxa. |
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| Species | Botanical divisions | Content |
| albida Duch. | Description, Image | |
| heppii Merxm. | Description, Image | |
| hockii De Wild. | Description, Image | |
| odoratissima L. L. | Image | |
| promissa Mast. | ||
| ringens Vahl | Image | |
| triactina Hook.f. | ||
| zenkeri Engl. |