Simpsonanthus jonesii is a species of flowering plant in the borage family known by the common name Mojave popcornflower.

[2] It is native to the southwestern United States and northern Mexico, where it grows in desert mountains and flats in scrub and woodland habitat.

Simpsonanthus jonesii is an annual herb growing mostly upright or erect, approaching a maximum height near 40 centimeters.

The leaves alternately arranged along the stem are up to 10 centimeters long.

The inflorescence is a series of tiny white flowers each 1 to 3 millimeters wide.