Flora, Life Form, and a Chorological Study of Bazarjan Region’s Vegetation in Markazi Province

Bazarjan region includes an area of 31197 hectares in the north of Tafresh city and is between 49˚ 59ʹ to 49˚ 50ʹ east longitude and 34˚ 56ʹ to 34˚ 31ʹ north latitude. The present study aimed to investigate the flora, life form, and the chorological status of vegetation in the Bazarjan region, Markazi. The results of the study of the flora of the region showed that there were 293 species of 61 families and 208 genera in this region. The Brassicaceae and Asteraceae with 41 and 38 taxa were the largest families and Astragalus with 14 and Alyssum with 7 species, respectively, were the largest genera in the region. The life form of the collected plants was studied according to Raunkiaer classification, which showed 37.54 % of the Therophytes, 24.91 % of the Hemicryptophytes, 19.11 % of Chamaephytes, 11.94 % of Geophyte, 4.77 % of Phanerophyte, and a small percentage of Helophyte and Epiphytes. The highest percentage of the geographical distribution of plants in the region was related to Irano-Turanian vegetative elements with 60.4%. After that, 11.26% of the plants in the region were from Irano-Turanian and Europe-Siberian elements, 5.8% of the plants were from Irano-Turanian and Sahara-Sindi, and 4.43% were Iranian-Turanian and Mediterranean. Also, 31 species were endemic to Iran, and 30 species were endangered.