ACKNOWLEDGEMENTS
We appreciate the experimental support in the laboratory from Jasmin Andisha, Emily Hanschke, Daniel Müller, Peter Sack, and Anna Loreth. Support from Peter Sack and Rene Bruse and gardeners from Botanical Garden Heidelberg, Jonas Silbermann, and Bärbel Schwarz with plant cultivation and collection management is greatly acknowledged. We are also grateful to Elżbieta Cieślak and Michal Ronikier (Polish Academy of Science, Krakow) for providing original seed material from C. polonica and C. tatrae .
This work was supported by a grant from the German Research Foundation (DFG) to Marcus Koch (KO2302/23-2).