Mediocre succulent annuals with erect or ascending stems frequently rooting at the lower nodes. Leaves alternate, with basal sheaths. Inflorescence terminal, diffusely paniculate, bearing very many small deliquescent flowers. Sepals 3, somewhat unequal. Petals 3, very unequal, the anterior much reduced. Stamens 6, rarely 5, in 2 dissimilar series; filaments naked. Pistil 2-celled.