Floristic study of Einolkosh area in Kermanshah

Einolkosh region covers an area of 2000 hectares situated in the southwest of Kermanshah. Minimum and maximum altitudes of study area are 1550 and 1850 m, respectively. Mean annual precipitation of the area is 430.7mm and mean annual temperature is 15.1˚C. The aim of this research was to identify the plant species, introducing the flora, determination of life forms and geographical distribution of species in the area. For this purpose, plant samples were collected from different habitats of the area during growing seasons in 1385. The biological spectrum of the area was plotted by means of life forms results. The position of the area within Iran’s phytogeography classification was studied based on geographical distribution data. In this study, 156 species are collected and identified. These species belong to 27 families and 118 genera. The following families had the highest number of species: Asteraceae (32 species), Fabaceae (27 species) and Poaceae (14species). Therophytes with 91 species (58.3%) are the most frequent life form. Investigation on geographical distribution of species showed 86 species (55.1 %) belong to Irano–Turanian region. Of these, 12 species are endemics of Iran.