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Concentrations (μg g−1 dry weight) of Cd (A,B), Zn (C,D), and Co, Cu, and Pb (E,F) in soils (A,C,E) and N. brachypetala populations (B,D,F) sampled on the southern slope of the eastern Pyrenees. Metal concentrations in field collected plants were only analyzed in Aneu and Mauri; Freser population was not collected because of the low number of individuals. Metal concentrations were analyzed by ICP-MS after aqua regia extraction.
