Distribution of the 23 sampling locations included this study.

<p>Abbreviations for localities are in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0040412#pone-0040412-t001" target="_blank">Table 1</a>. Coloured dots represent the distribution of the 15 populations with microsatellite information. Red dots correspond to populations with intermediate genotypes, and blue and white dots represent two well-differentiated groups in the STRUCTURE analysis (Fig. 3). Black dots are populations without microsatellite information. Crossed hatching indicates the general distribution of the species and colours increasing elevation from green to red [modified from 83].