Introduction to the flora, life forms and chorology of Saral of Kurdistan (Case study sub catchment Farhadabad)

The Saral region is located in Kurdistan province in Iran. Farhadabad sub catchment is a part of Saral rangelands with 3312 hectares area. Its geographical position is 46º 44´ N to 46º 47´and 35º 31´ E to 35º 37´. Flora of these rangelands includes 275 plant species which belong to 39 families and 172 genera. The largest families are Asteraceae (33 species)، Papilionaceae (30 species)، Apiaceae (28 species). The most important genera are Astragalus (14 species)، Centaurea (9 species) and Salvia (6 species) respectively. The main life form of plant species includes hemichryptophytes 57. 09%، Therophytes 20% and Bulbygeophytes 10. 18%. Investigation on chorology of plant species showed that 72 persent of species belong to Irano_Touranian region and other species can be found in other regions too. The number of endemic plants of Iran are 49 species (17. 81%)، and the number of endangered species are 34 in Saral region.