Thamnosma montana, the turpentine broom,[1] or Mojave desert-rue, is a shrub in the citrus family Rutaceae.

Except immediately after heavy rains, its straight stems usually lack leaves, giving it a broom-like appearance.

[2] It is a shrub with many infrequently branched, more or less straight, broom-like, yellow-green, 30 to 60 centimeter long stems.

The tips of the petals curve outward, revealing a protruding stigma and shorter yellow-tipped stamens.

It grows among desert plants such as creosote, blackbrush, ephedra, and Yucca species such as Joshua Tree.