or decumbent, succulent herbs, nodes or leaf axils with scales, bristles or
hairs sometimes inconspicuous or absent. Leaves sessile, alternate or opposite,
flat or terete. Flowers solitary or clustered, surrounded by a whorl of leaves.
Sepals 2, connate at the base into tube, inconspicuous, persistent. Petals 4-6
or many, free or shortly united at the base. Stamens 5 or many, adnate to the
base of petals. Ovary subinferior, styles 3-9 fid, ovules many. Fruit a
circumscissile capsule, sessile, ± globose. Seeds minute, orbicular-reniform,
usually glossy black, often tuberculate.