o:7731 Differences in inner bract shape in Goniolimon species (Plumbaginaceae) en Abstract: Morphological and molecular studies of Goniolimon species in southeastern Europe and the Apennine Peninsula revealed the occurrence of six species: G. besserianum, G. dalmaticum, G. heldreichii, G. incanum, G. sartorii and G. tataricum. In addition to the morphological characteristics used as diagnostic characters to differentiate the species, we wanted to investigate whether the shape of the inner bract can also be used for species delimitation. We analysed 138 individuals from 14 populations in the southeastern Europe. Canonical variates analysis (CVA) resulted in the categorization into five groups. Individuals of G. heldreichii, G. dalmaticum, G. sartorii and G. tataricum formed separate groups, while individuals of G. besserianum and G. incanum were grouped together. The changes in the shape of the inner bract, which contribute most to the differences between the species, are primarily associated with changes in the shape of the middle part (points 3 and 4) and the middle cusps (points 8, 9 and 10) of the inner bract. This study is an example of how geometric morphometrics can effectively address taxonomic problems in plant species, especially in distinguishing closely related species such as those within the genus Goniolimon. 1552100 978-86-6275-176-8 91552100 168629001 2025-05-30T12:12:17.256Z 44 no 46 Uroš Buzurović Institute of Soil Science 0009-0000-7702-659X 46 Sanja Đurović Faculty of Agriculture, University of Niš, Kosančićeva 4, 37000 Kruševac, Serbia 46 Marjan Niketić Natural History Museum, Njegoševa 51, 11000 Belgrade, Serbia 46 Milinković Mira Institute of Soil Science 0000-0001-5175-6842 46 Aneta Buntić Institute of Soil Science 0000-0002-7068-1804 46 Magdalena Knežević Institute of Soil Science 0000-0003-0186-3652 46 Gordana Tomović Faculty of Biology, University of Belgrade application/pdf 678439 https://unilib.phaidrabg.rs/o:7731 no yes 1 70 92000004 71A05 Book of Abstracts: 15th Symposium on the Flora of Southeastern Serbia and Neighboring Regions, Niš, 23th to 25th May 2025 35 36 2025