Suffrutices, trees or shrubs. Inflorescence a terminal, many-flowered corymbose cyme. Receptacle gradually narrowed into a
pedicel-like base above the articulation, distinctly prolonged beyond summit of ovary as an "upper receptacle". Calyx usually an indistinctly lobed rim-like extension to the upper receptacle. Petals 4, cohering and falling together as a calyptra. Filaments
and style c.2 times as long as petals. Ovary 2-locular. Fruit a berry. Derivation of name: joined together, presumably referring to the opposite leaves Worldwide: c. 1000 species in the tropics of the Old World Zimbabwe: 15 taxa. |