Annual or perennial herbs. Stems 4-angled to -winged. Flowers 4-merous, borne in axillary few-many-flowered fascicles. Calyx campanulate with 4 erect lobes. Corolla: tube with 4 semilunate fimbriate-papillose scales subtending the filaments; lobes 4, without nectaries. Stamens ± equal, all fertile. Ovary 1-locular; ovules numerous. Fruit a 2-valved obovoid capsule. Worldwide: 17 species throughout tropical Africa. Zambia: 12 taxa. |
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| Species | FZ divisions | Content |
| acaulis R.E. Fr. | N,W,C | Description, Image |
| affinis De Wild. | N,W,E | |
| alata P. Taylor [DD] | N | |
| amara Gilg ex Baker | N,W | Description, Image |
| axillaris Baker | N,W | |
| corniculata P. Taylor [VU] | N | |
| duvigneaudii Lambinon | W,S | |
| fanshawei P. Taylor | W | |
| hutchinsonii P. Taylor | C | |
| minutiflora P. Taylor [DD] | N | |
| pusilla Baker | B,W,C | |
| salutaris Welw. | B,N,W,C | Description, Image |