the surrounding host rock in which they are found. Certain plants that concentrate these elements act as indicator species for likely ore body locations. Mapping these plants provides information about areas in which further prospecting should be done. For example, in areas such as the Colorado Plateau, various species of Astragalus are selenium concentrators (A. pattersoni, A. preussi, A. thompsonae). Other indicator plants for sulfur and calcium, such as Eriogonum inflatum and Oenothera caespitosa help to identify likely areas also, especially in conjunction with the selenium indicators. Other regions In areas outside the Colorado Plateau, such as in South Australia or Saskatchewan, Canada, other plants would naturally be used. See also List of uranium mines phytoremediation References Cannon, H. L., 1957, Description of Indicator Plants and Methods of Botanical Prospecting for Uranium Deposits on the Colorado Plateau, Geological Survey Bulletin 1030-M. McKelvey, V. E., 1955, Search for Uranium In the United States, Geological Survey Bulletin 1030-A. Uranium mining