The borage Family Boraginaceae is treated for the southwestern United States. Treated are 18 genera, 113 species, and 24 varieties from Arizona, New Mexico, and the desert regions of southeastern California. A key to the genera and species is included along with detailed descriptions, distribution data, chromosome counts when known, and comments for many of the taxa. A proposed new combination is Plagiobothrys scouleri (H. & A.) I. M. Johnston var. cusickii (E. L. Greene) Higgins.
Higgins, Larry C.
"Boraginaceae of the southwestern United States,"
Great Basin Naturalist: Vol. 39
, Article 1.
Available at: https://scholarsarchive.byu.edu/gbn/vol39/iss4/1