Dendroflora as part of biodiversity is very important, both in natural environments and in designated urban areas. Based on the researches done abroad, a similar research was also set up for the parks of the city of Zrenjanin. In order to determine the level of biodiversity development, a field study of dendroflora was performed and its numerous state was determined. Zrenjanin parks have 97 different species of which 44 are indigenous, 46 are introduced and 7 are hybrid. Most plants are not indigenous, but introduced (45.4% indigenous, 54.6% intruders), which can harm biodiversity.