[4][5] The genus name Psoralea is based upon the Greek word "psoraleos", which translates to "warty"; referring to the wart-like structures found on the bark of some of the species.

Leaves glabrous (devoid of hairs) and tri-foliate with the leaflets narrowly lanceolate in shape; tapering off to an extraordinarily acute tip.

Conspicuously large stipules occur to the base of the petiole or leaf-stalk - hence the common or vernacular name of large-stipule fountainbush.

The inflorescence is loosely capitate[9] up the stem and pedicels or flower stalks long and axillary, with several clustered up the shoot.

The small flowers are indigo in colour with the upper banner petals displaying two white spots in the centre, each adjacent to one another.