Rhinotropis acanthoclada, synonym Polygala acanthoclada,[1] is a species of flowering plant in the milkwort family known by the common names desert polygala and thorn milkwort.

It is a small, bushy shrub spreading or growing erect and approaching one meter in maximum height.

It is hairy in texture, the youngest twigs hairiest with a feltlike coat of short, whitish fibers.

Each flower has five sepals, the lateral two white in color and spreading out like wings.

The middle petal is keeled, with a flat tip protruding.