Halophytic herbs or undershrubs. Stem with jointed nodes. Leaves opposite, decussate, small. Flowers solitary axillary or in cymes, sessile, pink. Sepals 4-6, induplicate or valvate, persistent. Petals 4-5, imbricate, claw with a ligular scale on the inner side. Stamens 4-6. Stigma 2-3 forked. Capsule unilocular, splitting by three valves.