http://free-pu.t-com.hr/romeo-tomaz-biodiversity/piante_2/rosa_canina.jpg Lower right leaflet looks similar to yours. http://upload.wikimedia.org/wikipedia/commons/d/d0/Rosa_canina_hips.jpg Rosa pimpinellifolia? http://www.colorfulnature.com/pictu...-m&picName=Rosa_Pimpinellifolia_Single_Cherry
The prickles here are not quite of those of Rosa canina (key feature) - http://www.plant-identification.co.uk/skye/rosaceae/rosa-canina.htm