Leaves usually small, narrow, alternate or opposite to nearly so below, or fasciculate, oblong, elliptic or spathulate, entire or occasionally toothed.
Stamens 4, didynamous, inserted at base of throat, exserted; filaments filiform; anthers monothecal; staminode if present, small.
Flowers sessile or subsessile, or shortly pedicellate, spicate, paniculate or corymbose, bracteate.
Capsule ovoid or subglobose, of ten separating into 2 cocci at maturity, included in calyx.
Small or dwarf, much-branched, heath-like shrubs or undershrubs, or annual herbs.
Ovary bilocular; style slender, obtuse, thickened to tridentate at apex.
Calyx 5-lobed.