Studies of the flora in Darmian area in the Southern Khorasan province

The basin area of the Furk and Darmian river is located in northern-east of the Southern Khorasan province. The whole area was 11137 hectares. The area is mountainous with mild weather and dry climate and the average precipitation is about 250 mm per year. In this study، 268 species belonging to 47 families were investigated and 194 genus were identified. The Asteraceae family with 44 species and 34 genera was the largest family in the area. The largest genera were Cousinia with 6 species and Astragalus and Ephorbia with 5 species. The largest life forms in the Darmian area belong to Therophytes with 43% and Hemicryptophytes 37%، Phanaerophytes 9%، Chamaephytes 6%، Bulbous Geophytes and Rhizomatous Geophytes each with 2% and Tuberous Geophytes 1%.