Local knowledge of medicinal plants from the point of view of nomads in the raangelanfs of Chehel-Kaman, North Khorasan province

Achievement to experiences and informed and non-documentary information is one of the valuable ways for recovering the traditions which are unconsciously threatened with destruction. The object of this research was identification the medicinal plants using by nomads and collecting their information about Medicinal organs and how they are used, as well as diseases that can be treated with these plants, and in fact the study of ethnobotany and the ethno-pharmacology of medicinal plants using by nomads in the Chehel-Kaman rangeland. Registration of Beliefs and Indigenous Data of the Nomads was conducted by interview in both places of residence in the nomads and participatory interviews at the habitat of the plants. The interviewees were selected by snowball method. At the same time, through participatory interviews and field surveys, plant species were collected to identify based on valid sources of Botany. For each medicinal plant species, the scientific name, family, local name, medicinal organ, current therapeutic properties, as well as the method of preparation and use of herbal medicine were developed. Relative Frequency (RF (and Use Value (UV) for each medicinal plant were calculated. In the study area, 51 medicinal species belonging to 26 family were identified. The most populous plant families were Asteraceae and Lamiaceae with 7 and 6 species. The findings showed that the highest frequency of medicinal plants was used for treatment of gastrointestinal diseases (52.94%). The highest UV was belonged to Thymus transcaspicus and Bunium persicum equal to 0.66.