TCS haplotype network obtained from sequencing the plastid intergenic spacer regions psbA-trnH and trnC-petN for 52 individuals of L. alpina from 17 different populations. Circle dimensions are proportional to the haplotype occurrence. Small, white circles represent non-detected intermediate haplotypes. Colours refer to different subspecies and or geographic areas (for populations from the Vranica Mts and the Southern Carpathians). Circle with thick outlines refer to the haplotype registered in the L. alpina samples from the Vranica Mts.