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Succulent, glabrous aquatic annuals with erect stems from a creeping rhizome. Roots numerous at each rhizome node, stout, with many long thin side roots. Stems up to 25 cm long, and up to 7 mm in diam., unbranched or with a few short side branches, succulent. Leaves reduced below, upper fairly close to­gether, narrowly ovate, up to 4 cm long and 1 cm broad, attenuate below, shallowly serrate, thin; stipules small. Flowers small, in many-flowered, tight clusters, sessile or very shortly pedicellate. Sepals narrowly ovate, 1,5 mm long, membranous with entire margins. Petals narrowly ovate, slightly longer, pale lilac. Sta­mens 10. Ovary globose, styles short. Capsule globose, the valves flattened and recurved at dehiscence; seeds subcylindrical, straight or slightly bent, 0,8 mm long, tesselate, shiny yellow brown. Fig. 6: 4.