Distribution map of Quercus ilex (holm oak) and Quercus rotundifolia (ballota oak).
     Quercus ilex
     Quercus rotundifolia (syn. Q. ilex rotundifolia, Q. ballota)
     Introduced and naturalised (synanthropic)
Caudullo, G., Welk, E., &amp; 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.5114062
References:

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Giovanni Caudullo