effect of ecological factors on chemical compounds of verbascum songaricum leaves

background & aim: verbascum songaricum is a perennial herbaceous belongs to the scrophulariaceae (snapdragon) family. current study was done to study the environmental conditions effect on phytochemical properties of verbascum songaricum leaves for extracting the effective materials. experimental: this study was conducted at five range sites, including hoze valley, ghahiz, someirom, ghale gadam, and dena in two provinces (isfahan and kohghiluyeh va boyer ahmad) iran. the specimens were collected in flower stage on july 2011. leaves extract was obtained using digestion method and then analyzed by gm-ms to identify the main compounds in extract. results & discussion:  results indicated the ketone and alcoholic compounds in ghazis and someirom and dena were the higher than hoze valley and ghale gadam regions. soil ph was as an important ecological factor affect on the main components in the extract of v. songaricum leaves. the highest amount of hydro-carbonic and amine compounds detected in  ghazis and someirom and dena regions. industrial and practical recommendations:  according to the results, it is recommended that with respect to the recognition of some ecological factors of verbascum songaricum, the fields for widespread cultivating and producing of this plant can be prepared.