Capsule long, flattened parallel to the false-septum, bivalved, valves splitting loculicidally.
Stamens didynamous, enclosed; anther-thecae connate above, divergent towards the base.
Calyx spathaceous, cuspidate or uncinate at the apex, shorter than the corolla tube.
Corolla campanulate, 5-lobed, bilabiate, funnel-shaped at the base.
Ovary oblong, bilocular; ovules numerous 4–6-seriate per locule.
Leaves opposite, imparipinnate; pseudostipules well developed.
Inflorescence a terminal or axilliary panicle or raceme.
Disk annular or cup-shaped.
seeds paper-winged.
A shrub or tree.
Shrubs or trees.