plant species diversity in gonabad

Gonabad located at khorasan razavi and coordinates 58° 30’ n 34° 35’ e. the highest point of the zone belongs to peak of siah mountain (height of 2,863 meters above sea level) and the lowest place has height of 810 meters above sea level, which is located in north west in salt desert. the mean temperature of the warmest and coldest of year is 29.3 and 3.9 respectively. moreover, mean of rainfall is 142.4 millimeters. in current research, we studied in gnabad’s zone in khorasan province. in gonabd’s zone growth 210 species and subspecies belonging to 131 genera and 34-plant family.