1. Institute of Ecology and Earth Sciences, University of Tartu Tartu Estonia
2. Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle‐Wittenberg Halle (Saale) Germany
3. German Centre for Integrative Biodiversity Research (iDiv) Halle‐Jena‐Leipzig Leipzig Germany
4. Department of Systematic and Evolutionary Botany University of Zürich Zürich Switzerland