1 Editor-in-Chief of PhytoKeys, Distinguished Scientist and Curator of Botany, National Museum of Natural History, Smithsonian Institution, P.O. Box 37012, Washington, DC 20013-7012, USA.
2 Deputy Editor-in-Chief of PhytoKeys, Head of Algae, Fungi and Plants Division, Department of Life Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom.