Shrubs or subshrubs to about 1 m. tall, much branched with slender and flexous stems often with many dwarfed side branches in the axils of their leaves.
Pedicels short and 1–flowered, normally bearing one bract and two opposite bracteoles, but the bracteoles sometimes absent.
Stamens 4; filaments free, inserted on a hypogynous disc; anthers often with appendages, dehiscing by lateral pores.
Fruit a cartilaginous loculicidal capsule contained within the persistent calyx and corolla.
Leaves in whorls of 3 or 4 (always 3 in the F.Z. area), very small, the margins reflexed.
Inflorescence consisting of clusters of flowers at the tips of the branchlets.
Calyx actinomorphic, segments free to the base.
Calyx and corolla hypogynous, tetramerous.
Style 1, somewhat expanded at the apex.
Ovary 4–loculate, placentation axile.
Seeds several per loculus.