This research was conducted in Zengi Rangeland, in the vegetation period of 2012. The Zengi Rangeland is locatedwithin Isparta/Sütçüler district boundaries and its average altitude about 1280 meters and slope is about 5%. During the research,while characteristics of the vegetation in the area that covered by plants, botanical composition, aboveground/undergroundbiomass and rangeland condition have been handled have been examined. Transect and quadrat methods were used in order todetermine the rangeland flora of the case study area. A general soil characteristic of the research area has been examined andtexture class has been found as a clayey texture. It has been figured out that soil is in good level with the following features;slightly alkaline with the amount of pH 7.83, more chalky with the rate of 17.5%, with 3.76% of organic matter. In the researcharea 122 taxa belonging to 30 families have been detected. The families that have much taxa are as follows in order; Fabaceae,Asteraceae and Lamiaceae. The plant cover area was identified as 21.75% of total area. Additionally, the botanical compositionof rangeland consists of 63.51% of Poaceae, 16.39% Fabaceae and other family 20.10%. The aboveground and undergroundbiomass yields were calculated as 475.45 kg/da and 700.40 kg/da, respectively. The rangeland condition was established as poor.