Tetradymia spinosa is a species of flowering plant in the aster family known by the common name shortspine horsebrush.

[1] It is native to the western United States, especially the basins and plateaus west of the Rocky Mountains.

It is a bushy shrub with many branches coated in woolly white fibers and growing to a maximum height around a meter.

The leaves are narrow, curving, and hooklike, hardening into sharp spines up to 2.5 centimeters long.

Consumption causes liver damage and extreme light sensitivity, which in combination may be deadly.