Suffrutices or small shrubs. Inflorescence of axillary cymes or solitary. Calyx actinomorphic, 5-lobed. Corolla distinctly 2-lipped; upper lip 2-lobed; lower lip 3-lobed. Fertile stamens 4, didynamous. Capsule cylindric. Seeds bearing hygroscopic hairs; seeds 2 per loculus. Worldwide: 65 species in tropical and warm regions Zimbabwe: 1 cultivated taxon. Insects associated with this genus:
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| Species | Content |
| thunbergiiflora (S. Moore) Lindau | Description, Image |