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DescriptionAnnual or perennial herbs or shrublets. Stipules present, scarious. Leaves opposite and often falsely whorled. Inflorescence a dense cyme. Flowers usually inconspicuous, bisexual, actinomorphic, 5-merous. Sepals free. Petals present (in ours). Ovary 1-locular. Style 1. Fruit an indehiscent nutlet, 1-2-seeded, included in the persistent calyx.