An introduction of flora, life form, chorotype and habitat of plants around Sepidroud dam, Iran

In this research، the lake of Sepidroud dam was situated which is located near Manjil in 300-400 m above sea level. Average annual precipitation reached to 213. 7 mm. The dominant vegetation of this area was Amygdalus-Artemisia community. A total of 239 species were identified based on plant samples collected in 2011. They included one fern، two gymnosperms، 210 dicotyledones and 26 monocotyledones. Altogether، 57 families and 194 genera were known from the area. The following families had the highest number of species: Asteraceae (18%)، Poaceae (7. 5%)، Brassicaceae (6. 7%)، Lamiaceae (6. 3%)، Fabaceae (5. 4%)، Chenopodiaceae (5. 4%) and Caryophyllaceae (5%). Therophytes with 48. 5% and hemicryptophytes with 25. 5% were the most frequent life forms of the area. The distributions of 47. 7% of species were restricted to Irano-Turanian region. Gravelly-lime lands had the most species richness between different habitats. 178 species were growing in the habitat.