1. Department of Biology University of Ottawa Ottawa ON K1N 6N5 Canada
2. Departamento de Biología (Botánica), Facultad de Ciencias Biológicas Universidad Autónoma de Madrid C/Darwin, 2 Madrid 28049 Spain
3. Centro de Investigación en Biodiversidad y Cambio Global (CIBC‐UAM) Universidad Autónoma de Madrid Madrid 28049 Spain
4. Royal Botanic Gardens, Kew Richmond Surrey TW9 3AE UK
5. Institut de recherche en biologie végétale (IRBV) Université de Montréal Montréal QC H1X 2B2 Canada
6. Laboratory of Environmental Toxicology and Aquatic Ecology, Faculty of Bioscience Engineering Ghent University Ghent 9000 Belgium
7. Department of Biological Sciences, Bolus Herbarium University of Cape Town Private Bag X3, Rondebosch Cape Town 7701 South Africa
8. Department of Animal and Plant Sciences, University of Sheffield Alfred Denny Building, Western Bank Sheffield S10 2TN UK
9. Hortus botanicus Leiden Universiteit Leiden PO Box 9500 Leiden 2300 RA The Netherlands
10. Systematic and Evolutionary Botany Lab, Department of Biology Ghent University K.L. Ledeganckstraat 35 Gent 9000 Belgium