Dr Maarten J. M. Christenhusz has an MSc on historic herbarium and a PhD on Marattiaceae. In 2009 he was founding editor of Phytotaxa. He has worked at the Natural History Museum, the Finnish Museum of Natural History and the Royal Botanic Gardens, Kew. He grows 160 plant families in his Kingston garden. Professor Michael F. Fay has a PhD on Trifolium and joined Kew in 1986, where he is currently Senior Research Leader in conservation genetics. His research interests include conservation genetics, phylogenetics and genome size. He is Chief Editor, Botanical Journal of the Linnean Society, and Chair, IUCN Orchid Specialist Group. Professor Mark W. Chase has a PhD on Leochilus (Orchidaceae). After teaching at the University of North Carolina, Chapel Hill, he moved to Kew in 1992, as Head of Molecular Systematics. His research has been on angiosperm phylogeny and polyploidy, focusing on orchids and, more recently, Nicotiana. He is one of the main coordinators of the Angiosperm Phylogeny Group.