This study was conducted on the floor coverings deployed in the mountain Gara in the province of Dohuk, which are located in northern Iraq between longitudes 43º 20ʹ 13.3ʺ - 43º 17ʹ 31.9ʺ and latitudes 37º 01ʹ 02.4ʺ- 36º 59ʹ 53.4ʺ and heights ranging from level Searb in 1402-1745 m and an area 240 km2. Featuring site Gara occurrence within the formations of the mountainous region، which has many different plant covers،
where in natural broadleaf، needle، mixed، as well as natural pastures and agricultural land. For the purpose of knowledge biodiversity of forests in the study area، we have based on the field survey and GIS system, we chose 6 random sample dimensions of 200 m × 200 m. different in aspect and height level. We was calculated density، dominance، frequency and importance value index (IVI)، as well as family importance value index (FIV) to assess the composition of plant. We measuring diameters and heights for all individual trees and classified into 5 classes، was a class diameter are abundant of the two sites while heights classes the class was abundant in both locations. The study were record significant differences of biodiversity used in the study Shannon-Wiener diversity index (H')، Shannon evenness index (E)) and Simpson's index (1-D) additive to Species richness (S). we see locations more species abundant which recorded the the range highest value of the IVI (123.78 – 0) this result include the normal range (0-300) ، This explain presence significant different between the location of samples because different the species، this result output of environment into plant Biodiversity in study region.