Floristic study of Lailakh region in Dehgolan, Kurdistan Province

Assessing the floristic resources of each region is very important because it serves to identify it’s the genetic potential. The Lailakh region with about 13600 hectares, is located in the west of Iran, neighboaring the Dehgolan city. In order to identify the flora, life form and chorology, plants of the region were collected during the growing seasons of 2015 and 2016. 261 species belonging to 197 genera and 50 families of vascular plants were recognized in the region. Asteraceae with 36 species, Lamiaceae with 23, Fabaceae with 20, Poaceae with 21, Apiaceae with 18, Brassicaceae and Boraginaceae each with 16 species are the largest families of this region flora. The largest genera were Astragalus, Salvia, Silene, Vicia, Centaurea, Euphorbia, Amaranthus, Allium , Bromus and Veronica each with 8, 4, 4, 4, 4, 4, 3, 3, 3 species, respectively. Studying the biological spectrum of species showed that Hemicryptophytes with 49 % is the dominant life form. The largest proportion of the chorological elements belonged to Irano-Turanian floristic region (52%), followed by Mediterranean and Irano-Turanian elements (11%), which indicated that the area was strongly influenced by Irano-Turanian floristic elements. Thirteen species (0.7 percent) in this habitat are endemic for Iran. In addition, 103 species used as medicinal plants.