Which genus has the most species of trees, Mesquite or Ceanothus
Mesquite Mesquite is the common name for the genus "Prosopis", containing over 40 species of small leguminous trees. They are native to the southwestern United States and Mexico (even the creeping mesquite, which is invasive in southern California).
Carruanthus Carruanthus is a genus of flowering plants from the ice plant family Aizoaceae.