Correspondence 1 indicates that for The Jepson Manual [Ed. 2] Citrullus lanatus (Thunb.) Matsum. & Nakai var. citroides (L. H. Bailey) Mansf. is to be treated as naturalized in CA, with a note stating that Citrullus lanatus (Thunb.) Matsum. & Nakai var. caffrorum (Alef.) Fosberg evidently has priority and so would be correct name.