Erect herbs, rarely shrubby below. Leaves alternate, linear to lanceolate, sessile. Flowers ebracteate, 5-merous, in cymes or racemes. Sepals entire. Petals linear to lanceolate or obovate. Glands 5, adnate to the staminal tube, opposite the petals. Stamens 5, connate at the base; staminodes present or absent. Carpels 5; ovary 10-locular due to secondary septa; styles 5, free or connate at the base; stigma linear to capitate. Fruit a septicidal capsule.