1. Royal Botanic Gardens, Kew Richmond SurreyTW9 3AEUK
2. School of Life Sciences University of Bedfordshire University Square LutonLU1 3JUUK
3. Department of Botany University of British Columbia 6270 University Boulevard Vancouver British ColumbiaV6T 1Z4Canada
4. Department of Biological Sciences Texas Tech University Lubbock TX79409USA
5. Plant Science and ConservationChicago Botanic Garden 1000 Lake Cook Road Glencoe IL60022USA
6. School of Fundamental Sciences Massey University Palmerston North4442New Zealand
7. Plant Evolutionary Biology Institute for Evolution and BiodiversityUniversity of Münster Münster Germany
8. Plant Systematics and Biodiversity Institute for BiologyHumboldt‐Universität zu Berlin Berlin Germany