Erect to trailing perennial succulent shrublets. Lvs opposite, sessile, 3-angled to terete, papillate; papillae glittering. Fls solitary or in cymes on short lateral branchlets, pedicellate, ebracteate. Sepals 5: 3 triangular with expanded membranous margins, 2 clavate. Petals numerous, > sepals, free; stamens numerous; staminodes often present. Placentation parietal. Stigmas 4-6, filiform to lanceolate or plumose. Capsule 4-6-locular; expanding keels contiguous, parallel or diverging; wings present; locules with lids; placental tubercle reduced or 0. Seeds small, ribbed and tuberculate.