Tetradymia nuttallii is a species of flowering plant in the aster family known by the common name Nuttall's horsebrush.

[1] It is native to the western United States, where it occurs in Nevada, Utah, Wyoming, and Colorado.

[2] This shrub or subshrub has a stiff, branching network of stems reaching up to 1.2 meters in maximum height.

The larger, primary leaves become spines which may be over 2 centimeters in length.

[2] This plant grows in habitat dominated by shadscale and black greasewood, as well as sagebrush and pinyon-juniper woodland.