Fig. 1.
Median-joining network for plastid DNA haplotypes in Cypripedium calceolus. The haplotypes are indicated by the circles, the size of each circle being proportional to the observed frequency of each haplotype. The number of mutations required to explain transitions among haplotypes is indicated along the lines of the network, except for connections that required only a single mutation. Median vectors are labelled mv1 and mv2. Information on haplotype sharing is provided for the three most frequent types. The predominantly Western European torso of the network (upper left) and the predominantly Central European nodes (lower right) are indicated by dashed rectangles. More information on haplotype sharing is provided in Table 6. The names of the Swedish provinces of Dalarna and Jämtland are abbreviated as dalar and jamt, respectively.