Shrubs or subshrubs with leaves either articulated at base and deciduous (Sp. 23) or not articulated and persistent or deciduous above base (Spp. 23, 24); inflorescence-branching dichasial, mainly acropetal; sepals 5, very unequal to subequal, persistent; petals 5; stamens 120-200, deciduous (Sp. 23) or persistent (Sp. 24); styles and placentae 3(4), placentation incompletely axile (Sp. 23) or parietal (Sp. 24).