Caulanthus crassicaulis is a species of flowering plant in the family Brassicaceae known by the common name thickstem wild cabbage.

It is native to the western United States where it is a member of the flora in sagebrush, woodland, and desert scrub habitats.

This is a perennial herb producing a stout, inflated stem from a woody caudex base.

They are broadly lance-shaped on the lower stem and much smaller and linear in shape higher up.

The fruit is a long, thin silique which may approach 13 centimeters in length.