FIGURE 1.

Sampled populations of Arabis alpina cover large parts of its global range (cf. Ansell et al., ²⁰¹¹) and indicate a focus on the European Alps (a). Points represent coordinates of published populations (data listed in the Appendix S1), and darker red colour indicates higher density of studies in given areas. Top row photos show typical alpine habitats of A. alpina: calcareous scree (b), moist habitats along small creeks (c), and areas of nutrient sinks such as road verges (d). Bottom row photos illustrate morphology of intermediately sized vegetative (e), flowering (f) and fruiting (g) individuals. The close‐up photo (h) shows adventitious roots growing from a mature shoot at the base of vegetative rosettes Photos: F. Gugerli and S. Wötzel; map made with Natural Earth