Lumia (citrus)
A recent genomic analysis of several species commonly called 'lemons' or 'limes' revealed that the various individual lumias have different genetic backgrounds. The 'Hybride Fourny' was found to be an F1 hybrid of a citron- pomelo cross, while the 'Jaffa lemon' was a more complex cross between the two species, perhaps an F2 hybrid. The Pomme d'Adam arose from a citron-micrantha cross, while two other lumias, the ‘Borneo’ and ‘Barum’ lemons, were found to be citron-pomelo-micrantha mixes.
Siracusa Lemon
The European Union has nine (PGI) denominations for lemons: six of these are from Italy, one from France, one from Spain, and one from Portugal. Other than the "Siracusa lemon", the Italian denominations are the "Limone di Sorrento", the "Limone Costa d'Amalfi", the "Interdonato di Messina", the "Femminello del Gargano", and the "Limone di Rocca Imperiale". The French denomination is the "Citron de Menton". The Spanish denomination is the "Citricos Valencianos", while in Portugal the "Citrinos do Algarve" is protected.