Vegetation maps and bioclimatic zone classifications communicate the vegetation of an area and are used to explain how the environment regulates the occurrence of plants on large scales. Climatic parameters, floristic characteristics, or edaphic features have been relied upon as decisive factors for developing such schemes. It has been deduced that plants moved between corresponding bioclimatic areas should thrive in the target location, whereas plants moved from a different zone should languish. This notion is routinely applied in forestry and horticulture but actual tests of the validity of...