Are Fremontodendron and Mitella both native to the southwestern United States and northwest Mexico?
Fremontodendron Fremontodendron, with the common names fremontia, flannelbush, and flannel bush, is a genus of three known species of shrubs native to the Southwestern United States and northwest Mexico.
Fleischmannia sonorae Fleischmannia sonorae, the Sonoran slender-thoroughwort or Sonoran thoroughwort, is a North American species of flowering plant in the sunflower family. It is native to western Mexico from Sonora and Chihuahua as far south as Michoacán, as well as from the southwestern United States (Arizona and New Mexico).