Pod asymmetrically narrowly obovate, at least 6 cm wide at maturity, ridged along each side of the upper suture, elastically dehiscent, apex long-acuminate.
Stamens 8–9(10), all equal in length; anthers 0.4–0.5 times the length of the filament, narrowly oblong-elliptic.
Inflorescence racemose, leaf-opposed on short shoots, rather few-flowered.
Ovary 2-ovulate, the stipe partially fused to the walls of the hypanthium.
Hypanthium shallowly cupular, much shorter than the sepals.
Petals 4–5, equalling or slightly longer than the stamens.
Sepals 4, reflexed at anthesis.
Small trees, deciduous.