Map displaying geographic distribution of genetic variation in the analysed <i>Picris</i> taxa, as inferred from the cpDNA intergenic spacer dataset.

<p>Coloured symbols indicate affiliation of accessions to the cpDNA genetic lineages as mentioned in the text. Bi-coloured symbols denote populations possessing two different haplotypes. Symbol shapes indicate taxa as follows: <i>P. hieracioides</i> – circle, <i>P. hispidissima</i> – triangle, and <i>P. olympica</i> – square. The circle symbols with empty centres refer to populations morphologically corresponding to <i>P. hieracioides</i> subsp. <i>hieracioides</i>, while those with solid symbols refer to populations morphologically corresponding to <i>P. hieracioides</i> subsp. <i>umbellata.</i> Population of <i>P. nuristanica</i> and <i>P. japonica</i> and outgroup taxa are not shown. Numbers refer to population codes as denoted in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0104929#pone.0104929.s001" target="_blank">Table S1</a>. The symbols and their numbers highlighted in red indicate populations harbouring rare haplotypes.