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 Siracusa lemon (in Italian, "Limone di Siracusa IGP") is the fruit of the cultivar "femminello siracusa" and its clones, corresponding to the botanical species Citrus x limon L. Burm. The "femminello siracusano" cultivar is the most common variety of lemon in Italy, with the Province of Syracuse (Siracusa) region accounting for 42% of the national lemon-growing land area.