Annual herbs, erect, aromatic. Leaves membranous, entire to dentate. Inflorescences terminal on slender main and lateral branches, spike-like; flowers shortly pedicellate, usually in 2-6 flowered verticils; bracts much smaller than leaves, persistent. Calyx bilabiate, accrescent; tube campanulate, 5-toothed, upper tooth the largest. Corolla small, tube short, upper lip short and broad, 4-lobed lower lip oblong, nearly flat, entire. Fruit nutlets, smooth, pale brown. Worldwide: 7 species in the Old World tropics Zambia: 1 taxon. |
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