Prostrate, diffusely branched, glabrous or papillose herbs. Leaves opposite, unequal, ex-stipulate. Flowers small, axillary, solitary or in cymes or clusters. Calyx 5-lobed. Petals absent. Stamens 5-10 or more, episepa¬lous. Ovary 1-2-locular, with 1 to many basal ovules; styles 1-2. Capsule membranous or coriaceous. Seeds few, reniform.