Figure 1

The distribution of Cirsium pitcheri. Circles represent all known elemental occurrences, dark circles in Canada represent populations from Gauthier et al. (2010), and stars are populations included in this study.
The distribution of Cirsium pitcheri. Circles represent all known elemental occurrences, dark circles in Canada represent populations from Gauthier et al. (2010), and stars are populations included in this study.