Calyx-tube hemispheric, glabrous or with a few long cilia; lobes 5, acute, equalling the tube, persistent. Petals ovate-lanceolate, acute. Stamens 8 or 10, equal; anthers similar orbicular-ovoid, pore minute, connective produced at the base and jointed on the apex of the filament with a minute tubercle at the joint. Ovary almost adherent, top tumid, glabrous; style flexuous; stigma capitate. Fruit capsular? Seeds cochleate. Slender, glabrous, or sparsely ciliate, branched, annual herbs. Stems filiform. Leaves small, petioled, membranous, rhombic-ovate, subobtuse, serrulate. Flowers axillary, solitary or few, rose-coloured.