L., Sp. Pl. 223 (1753).
Derivation: Greek treis, three; anthemon, flower; the flowers sometimes growing in 3's in the axils of the leaves.
Synonymy: Not Applicable
Common name: None
Prostrate or procumbent herbs, papillose or hairy; leaves opposite, petiolate, with dilated scarious bases resembling stipules.
Flowers small, clustered in the leaf axils, each with a membranous bract and 1 or 2 bracteoles at the base; perianth usually fleshy, usually cut about half-way into 5 imbricate lobes; stamens 5-20, inserted near the summit of the perianth tube; ovary superior or semi-inferior, 1-celled, with 1 style and 2 ovules.
Capsule more or less truncate at the summit, circumsciss, coriaceous in the upper half.
At least 20 species, almost cosmopolitan; 12 in Australia.
Key to Species:
Not yet available