| General Information |
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| Distribution | A genus of about 100 species from the Old World tropics, 1 in tropical America.
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Habit
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Shrubs or herbs, often xerophytic.
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Leaves
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Leaves usually with prominent cystoliths, margin entire, petiolate to subsessile.
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Flowers
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Inflorescences a dense, axillary or terminal spike or raceme. Flowers subtended by bracteoles, these often large and spinose; calyx distinctly zygomorphic, deeply 4-lobed, 2 segments larger than the other 2, pairs often also of different shapes; corolla 5-lobed, lobes broadly spreading and subequal; stamens 4, in 2 pairs.
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Fruit
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Fruit a capsule.
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Seeds
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Seeds 4.
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Notes
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Named in honor of Jacques Barrelier (1606-1673), a French botanist.
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Contributor
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Nancy Khan
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