Capsule ellipsoid or clavate, shortly rostrate, dehiscing septicidally into 3 valves from the apex downwards.
Leaves petiolate, usually elliptic and serrate at the margin, frequently glandular-punctate; stipules 0.
Petals eligulate, white, whitish or nearly translucent, inserted at the mouth of the calyx-tube.
Ovary 1-locular, 1-ovulate, the ovule basal; stigmas fringed.
Filaments filiform, inserted at the mouth of the calyx-tube.
Seed obovoid, straight, longitudinally striate-reticulate.
Calyx connate below the middle, with 5 tubercles within.
Flowers in terminal and axillary panicles or racemes.
Shrubs.