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Lythraceae

30 genera, 8 with aquatic species.

Annual, perennial or shrubby. Stems often inflated when submerged or floating. Leaves whorled, opposite or sometimes alternate, simple, entire, without stipules. Inflorescence simple or complex, usually based on repeated axillary cymes. Flowers bisexual, actinomorphic or zogomorphic, sometimes heteromorphic, sometime cleistogamous. Sepals 4-6 (-7), united into a tube, the lobes valvate, often with appendages between the lobes. Petals 4-6 (-7) or absent, caducous, often crumpled in bud. Stamens as many or wice as many as the sepal lobes, rarely more or less. Ovary superior, free from the sepal tube, (1) 2- to 6-locular; septae separating the locules often incomplete; placentation axile or free-central; fruit a capsule.

© Christopher D.K. Cook