10th Symposium on the Flora of Southeastern Serbia and ...

10 th <strong>Symposium</strong> on the Flora of Southeastern Serbia and Neighbouring regions,Vlasina 17 to 20 June 2010epidermalnih ćelija lica i naličja su uglavnom ravni. Površina epidermskih ćelija licalista je 1879,67±608,07 µm 2 , dok je površina ćelija epidermisa naličja1046,11±339,42 µm 2 . Kutikula lista je dobro razvijena i na naličju je jako naborana.Listovi su hipostomatski sa anomocitnim stomama uvučenim ispod ćelijaepidermisa. Broj stoma je 102,82±11,68 po mm 2 , a površina stoma 1411,62±196,48µm 2 . Na naličju lista se nalaze mehaničke, jednoćelijske dlake. Dlake su retke,3,60±3,29 po mm 2 . Analizirani parametri ukazuju na prisustvo kseromorfnihkarakteristika lista vrste Daphne malyana sa planine Tare.Phytogeographical and phytocoenological analysis of theendangered plant taxa in the flora of the Vlasina plateau(SE Serbia)Ranđelović, V., Zlatković, B., Dimitrijević, D., Vlahović, T.University of Niš, Faculty of Sciences and Mathematics, Department ofBiology and Ecology, SerbiaIn analysing the flora of the Vlasina plateau, it was determined that this areacontains 956 species, 23 subspecies, 32 varieties and 28 forms of vascular plants.The data shows the exceptional floristic riches of this territory. Among thesespecies, there are 91 species (9.52%) which may be categorized as under threat inthe flora of Serbia. Critically endangered taxa (Cr) are especially interesting becausetheir sanctuary in Serbia is only in the Vlasina plateau. This group includes thefollowing species: Betula pubescens, Elatine triandra, Utricularia minor, Cirsiumhelenioides and Carex limosa. All these species have the boreal type of distributionand live in wetlands. The aim of this paper is to show the phytogeographical andphytocoenological affiliation of all the threatened taxa.53