Mitella is a genus of flowering plants known as miterworts or bishop's caps.
 "Mitella" species are native to temperate and arctic North America and Asia.
Chorizanthe corrugata is a species of flowering plant in the buckwheat family known by the common name wrinkled spineflower.
 It is native to the Mojave and Sonoran Deserts of the southwestern United States and two states of northwest Mexico, Baja California and Sonora.
Delphinium parishii, the desert larkspur, is a flowering plant in the family Ranunculaceae (the buttercup family) native to the Mojave Desert, in the southwestern United States and northwest Mexico.
 In Southern California it is also found in the Tehachapi Mountains and other Transverse Ranges.
Washingtonia is a genus of palms, native to the southwestern United States (in southern California, southwest Arizona, (Nevada) Texas) and northwest Mexico (in northern Baja California and Sonora).
 Both "Washingtonia" species are commonly cultivated across the Southern United States, the Middle East, southern Europe, and north Africa, where they have greatly hybridized.
Mohavea confertiflora, the ghost flower, is a plant of the family Plantaginaceae.
 It is a native of the Southwestern United States, southern California, and three states of northwest Mexico.
Vance T. Holliday (born 1950) currently serves as a professor in the School of Anthropology and the department of Geosciences as well as an adjunct professor in the department of Geography at the University of Arizona in Tucson.
 His professional research interests include geoarchaeology, Paleoindian archaeology, soil-geomorphology as well as Quaternary landscape evolution and paleoenvironment with a current emphasis on the southwestern United States and northwest Mexico.
 Prior research areas have included the Great Plains as well as Paleolithic sites in southwestern Russia.
 Holliday currently serves as the Executive Director of the Argonaut Archaeological Research Fund (AARF) based in the School of Anthropology at the University of Arizona.
 His most recent research, outlined in a 2011 Journal of Field Archaeology article, has focused on understanding the Paleoindian occupation around large paleo-lakes in the Southern landscape at the end of the Pleistocene.
Eriogonum wrightii is a species of wild buckwheat known by the common names bastardsage and Wright's buckwheat.
 It is native to the Southwestern United States, California, and northwest Mexico, where it grows in many plant communities, such as chaparral, in rocky habitats from mountains to deserts.
Perityle emoryi is a species of flowering plant in the aster family known by the common name Emory's rockdaisy.
 It is native to the Southwestern United States, northwest Mexico, and the Baja California Peninsula.
 It is a common wildflower of the deserts, and can also be found in California coastal regions.
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.
The Kumeyaay, also known as Tipai-Ipai, formerly Kamia or Diegueño, are Native American people of the extreme southwestern United States and northwest Mexico.
 They live in the states of California in the US and Baja California in Mexico.
 In Spanish, the name is commonly spelled Kumiai.

Question: Are Fremontodendron and Mitella both native to the southwestern United States and northwest Mexico?
Answer: no