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DescriptionAnnual herbs, sometimes ± woody at base. Stipules scarious. Leaves opposite or apparently whorled, linear to oblanceolate or ovate. Inflorescences of loose or compact terminal cymes, often with a single pedicellate flower between the main branches; bracts scarious. Sepals 5, scarious, not keeled, silvery, brownish, purplish or pinkish. Petals shorter than the sepals, 5, entire or emarginate. Stamens 5 (or fewer). Styles united below. Ovary 1-locular. Capsule 3-valved.