Fayaz, F. (2011) Encyclopedia of Tropical Plants Firefly Books, New Zealand
| Herbs, erect or creeping, spreading. Leaves opposite; lamina small, fleshy, rounded, often fragrant when crushed. Inflorescence solitary, axillary or in terminal racemes. Sepals (4or)5 free, imbricate, upper largest; corolla tubular, limb patent, conspicuously or obscurely 2-lipped, lower lip tri-lobed, upper lip bi-lobed. Fruit capsules, ovoid or globose, 2-grooved, 4-valved. Seeds numerous, minute. Worldwide: 55 species in the tropics and sub-tropics, mainly in America. Mozambique: 3 taxa. | No image yet | 
| Species | FZ divisions | Content | 
| floribunda (R. Br.) Wettst. | N,Z | Description, Image | 
| hamiltoniana (Benth.) Wettst. | N | |
| monnieri (L.) Pennell | N | Description, Image |