Taxonomic review of Scrophularia sect. Tomiophyllum in Bulgaria and Serbia: the case of Scrophularia bulgarica

The taxonomic treatment and geographical distribution of Scrophularia bulgarica (equivalent to S. variegata var. bulgarica, Scrophulariaceae), a rare and enigmatic taxon in the Bulgarian flora, and application of its name have been revisited. A revised species description and comparison with its closest and nomenclaturally related taxa, S. rupestris and S. heterophylla subsp. laciniata, are given. For the last three decades in the Bulgarian flora, S. heterophylla subsp. laciniata has been considered within the circumscription of S. bulgarica and therefore its presence in Bulgaria was neglected. On the other hand, S. bulgarica is newly reported for Serbia, hitherto erroneously identified as S. laciniata.