the study of flora ghaysari region in chaharmahal va bakhtiari province with 179 species of medicinal plants

background & aim: the present study was to identify the medicinal plant species and introduced as one of the key priority areas for conservation and determination of endangered species were done. experimental: the method of plant collection in this region was classical method of regional plant taxonomic studies. collected plants were recognized and determined families, genera and species of them by using of indispensable references. the life form of plant species was determined by using of raunkier’s method. results & discussion: the results of this study show that, 487 plant species belonging to 65 families and 301 genera exist in this area. among the 487 species listed in this area, about 179 species (36.76% of the species) are medicinal. furthermore, threatened species have been analyzed according to the iucn criteria and red data book of iran. on the basis of this study, four categories of rare species so called endangered, vulnerable, lower risk and data deficient are determined. accordingly, 86 threatened species were identified in this area that they all belong to the region, iran – tourna and 33 species that have some medicinal properties. of these 86 species, two species in endangered class, three species in vulnerable class, 67 species in lower risk class and 14 species in data deficient class. due to use nomads and villagers in the area of ​​medicinal plants, some species such as, ferula assa-foetida, ferula gumosa, allium ampeloprasum, allium jesdianum, allium hirtifolium and zaravschanica membranacea are subject to destruction.