Apart from foreign languages where a translation of a name is often better given a slightly different name, I think the usual reason for different naming in different countries is to do with trade names and copyrights which would perhaps apply to one country but not necessarily the other. Using a different name might overcome difficulties for the breeder.
http://www.finegardening.com/p...
"U. S. Plant Patent Applied For (PPAF)."
http://www.missouribotanicalga...
