Looks like in Italy, they distinguish different kinds of lemons from the same cultivar.
Femminello comune is a greatly reflowering cultivar with high setting aptitude; it has five annual blossomings to which five different names of fructifications correspond.
The most important blossoming, from a qualitative point of view, is the first, which produces fruit that ripen from October to March. They are the so-called ‘’winter lemons’, with a more or less rough epicarp, a high sourness and a variable number of pips. The earliest fruit of this first blossoming, which ripen between September and October, are called Primofiore; they are highly valued on the market. Then, there are the so-called ‘‘maiolini’, ‘’biancucci’ or ‘’bianchetti’, which are light yellow, with a slightly rough epicarp, few pips and a lower level of sourness. Very often they bear fruit in bunches; the ripening is between April and May. The famous ‘verdelli’, ripen in the summer of the following year, are rather cheap. The verdelli, that usually grow in bunches, have a smoother epicarp, a low sourness and almost no pips (technically, they say that the pips are aborted). Then, there are the so-called ‘‘bastards’, which ripen in after more or less a year and have a smooth epicarp and a deep yellow colour. Lastly, we have to remember the ‘‘marzani’, usually picked together with the winter lemons. They are never numerous, more or less of a round shape, and they have a rough epicarp, a long and flat umbo, a certain number of pips and a high sourness.
http://www.limmi.it/en/national-cultivars/