B. verna is native to parts of central, southwest and southeast Europe (Marhold 2011). This species has been widely introduced to the rest of Europe where it has become naturalized (Rich 1991). The species is widespread in France, occurring in the majority of departments across the country with the exception of Lot-et-Garonne, Lot and Haute-Garonne to the south and 16 departments in the north (Association Tela Botanica 2000–2010). Further research is needed to gather information about the precise distribution of this species throughout the rest of its range.
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