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DescriptionAnnual or perennial herbs, sometimes woody at the base, usually ± succulent. Stipules 0. Leaves opposite or alternate, simple. Inflorescences axillary, solitary or in groups. Flowers bisexual, actinomorphic. Perianth segments 5, united below into a tube, persistent. Stamens 3-many. Ovary superior, of 1-5 united carpels; ovules 1-many per loculus. Fruit a capsule, circumscissile (in ours).