identifying some medicinal kinds at risk of extinction in kallar mountain in chaharmahal va bakhtiari province

background & aim: chaharmahal va bakhtiari province contains several major floristic plant associations of central zagros mountains. kallar species were used for medicines nutrias in this area. however, these valuable species have been threatened and even become at risk of extinction due to habitat fragmentation and disturbance. therefore, the first step in protecting theses species is identify species habitats in particular in those with major plant associations. one of the important centers in the province of chaharmahal va bakhtiari province is kallar mountain; it is an area of ​​approximately 5,086 hectares and, is located at the center of the province. range of the mountain is between 1900 and 3814 meters above sea level. the average annual rainfall of 511.4 mg and average temperature is 10.45 ºc. experimental: various parts of the mountain were sampled more than 30 times and all the plants species were identified. a-biotic factors were also collected. results & discussion: the results showed that chaharmahal va bakhtiari province has about 1,300 species of choromophyta among which about 600 plant species were found in kallar. there are 91 medical species belong 38 family, 80 geniuses. 67 iranian endemic plant species were found in kallar among which 28 species medical were identified as medical such as achillea kellalensis boiss. & haus and satureja kallarica jamzad.  84 species are listed in red data book of iran, among which 61 species lr, are 12 species are (vu), 11 species (dd) were identified in kallar. industrial and practical recommendations: most endangered plants are medicinal and endemic by protecting, reproducing and rehabilitation of their habitats; major steps are likely to take in order to conserve plant genetic resources.