Conclusions
Based on the presented sequence analyses, our sequences of Tulipaspecies grouped into two main clades, belonging to the subgeneraEriostemones or Tulipa . There is not sufficient genetic evidence to confirm species of the T. scardica complex (T. scardica, T. serbica, T. albanica, T. kosovarica and T. luanica ) as independent taxa. Despite the lower resolution of thetrnL-trnF dataset, it does not support the separation of the taxa related to the T. scardica complex as independent species too. Genetic differences between taxa of the T. scardica complex show intra-specific variation, indicating the presence of polymorphism in the gene pool. Further analysis with more extensive sampling, using additional markers, as well as the determination of nuclear genome size (used DNA 2C-values) will be necessary for better understanding of the natural variability within the taxa of the T. scardica complex.