A new species and five new combinations of Sabulina (Caryophyllaceae) from Turkey

The genus Sabulina is represented by 26 taxa in Turkey. Some interesting specimens belonging to the genus, the main distribution area of which is the Mediterranean phytogeographical region, were collected in Erzurum province. These newly collected specimens and Sabulina rimarum var. rimarum were compared with each other in terms of their general morphology and seed micromorphology. Besides, by using DNA sequences of ITS genes, phylogenetic relationships between these collected species and the other species were investigated. As a result of the evaluation of molecular and morphological data together, it was decided that the specimens collected from Erzurum belong to a new species for the science world. This species was named Sabulina tortumensis, and its description, pictures, distribution, habitat preferences, degree of endangerment and phylogenetic relationships with closely related species are presented. Additionally, we propose new combinations for five taxa of Sabulina that did not have Sabulina names and provide a key to annual species of the genus in Turkey.