The flowers of Rhigozum trichotomum or driedoring (three thorn) are white, cream or pale pink, as is the case of the specimen in picture. The flowers usually grow in fascicles on small spur-branches, although this one appears solitary, at least at the time the photo was taken. In a good season driedoring bushes may be lavishly covered in blooms. The calyx of the flower is a short, ribbed tube. The corolla has a long tube, opening into five wavy, spreading lobes.
The corolla performs an important marketing function by attracting the plant's pollinators that live in the sparse vegetation of this semi-desert habitat. The stamens are attached to the inside of the corolla tube in the area where it widens. The anthers lie in ambush at the flower mouth alongside the style with the stigma at the ready, patiently awaiting the arrival of hungry insects and birds (Coates Palgrave, 2002).