Flowers single or few together, terminal or appearing lateral, sessile or shortly pedicelled.
Leaves alternate or sometimes opposite, sessile or almost so.
Capsule dehiscing by an apical lid, unilocular at maturity.
Stamens 5, free; filament–bases dilated, ciliate.
Seeds numerous, ellipsoid, ± trigonuos.
Calyx–lobes 5, united at the base.
Corolla funnel–shaped, 5–lobed.
Perennial prostrate herbs.