Distribution map of Acer campestre (field maple).
     ✖ Native continuous range and isolated population
     ▲ Introduced and naturalized (synanthropic) continuous range and isolated population
Caudullo, G., Welk, E., San-Miguel-Ayanz, J., 2017. Chorological maps for the main European woody species. Data in Brief 12, 662-666. DOI: 10.1016/j.dib.2017.05.007
Data: https://doi.org/10.6084/m9.figshare.5024546
References:

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Giovanni Caudullo