Appendix C. Detailed description of explanatory variables.

Detailed description of explanatory variables

Appendix B. The list of plant species analyzed.

The list of plant species analyzed

Appendix E. Missing data imputation procedure and results.

Missing data imputation procedure and results

Appendix A. Parsimonious regression tree, magnitude of the coefficients, and the probability of significance for parsimonious models.

Parsimonious regression tree, magnitude of the coefficients, and the probability of significance for parsimonious models

Appendix D. References used for the year of the first occurrence in the wild of central European species in North America.

References used for the year of the first occurrence in the wild of central European species in North America