Chorizanthe uniaristata is a species of flowering plant in the family Polygonaceae known by the common name one-awn spineflower.

It grows in sandy, gravelly, and rocky soils in chaparral and woodland.

This plant has upright or decumbent stems up to about 25 centimeters in length.

It is hairy and gray, green, or reddish in color.

The flower is 2 or 3 millimeters long and usually white.