According to M. Verlot, some varieties of the double annual stock, from having been long and carefully selected to the right degree, always produce a large proportion of seedlings bearing double and quite sterile flowers, but they likewise yield some single and fertile plants.
Verlot jaunak dioenez, aingerulore zuri bikoitzaren aldaki batzuek, luzaz eta arta handiz behar bezalako mailaraino hautetsiak izan direlako, lore bikoitz eta erabat antzuak dituzten landareñoak sortzen dituzte beti hein handian;