Villafranca lemons are similar to a Lisbon lemon in crop distribution and are hard to distinguish from the Eureka variety simply in looks (via Citrus Variety Collection). They are said to have originated in Sicily but don't get much love thanks to being not that special in comparison to our most recognizable lemons. However, according to Oscar Tintori, Villafranca lemon trees have fewer thorns, which is appreciated when picking.