Annual or short-lived perennial herbs. Flowers in opposite several-many-flowered cymes arranged in spike-like racemes or panicles; bracts leafy below, becoming smaller towards apex. Calyx ribbed, subequally 5-toothed; the tube somewhat accrescent in fruit. Corolla small, 5-lobed, ± 2-lipped; lowest lobe saccate. Stamens 4, declinate. Worldwide: 164 species in warm and tropical areas of America and West Africa with a few weedy species elsewhere in the Old World tropics. DRC: 0 taxa. |
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