Alpine flora of some part of Oshtorankuh, Lorestan province

Oshtorankuh located in west of Iran with the highest peak of 4050 m (above sea level). The aim of this research was to identify the plant species, introducing the flora, determination of life forms, and geographical distribution in two peak of Oshtorankuh area. For this purpose, plant specimens were collected from different parts of this area between 3000 to 4050 m during two growing seasons 2009-2010. The plant biological spectrum of the studied 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 and references. From 82 identified species in the studied area, 76 dicotyledons and 6 monocotyledons were presented. These species belong to 27 families and 63 genera. The important families are Asteraceae, Lamiaceae and Fabaceae with 17.07 %, 13.4 % and 10.9 %, respectively. Life forms of the plant species include Hemicryptophytes 67.07 %, Chamaephytes 15.85 %, Geophytes 9.76 %, Therophytes 2.44 %, Phanerophytes 2.44 % and Parasite 2.44 %. 67 species (81.7 %) were endemics of Irano-Turanian region; 23 species of them were endemics of Iran. Distribution of Astragalus shuturunkuhensis, A. lurorum, Cousinia khorramabadensis and Dionysia gaubae limited to Lorestan province