A. Culham is a plant geneticist in the School of Plant Sciences, University of Reading, England.0. Seberg is professor of Molecular Systematics at the Natural History Museum of Denmark and has published works on a wide range of botanical topics.V.H. Heywood is professor emeritus in the School of Plant Sciences, University of Reading, England. He co-edited all five volumes of Flora Europaea and is a member of several international taxonomic and plant conservation organizations.R.K. Brummitt is a plant taxonomist and the coauthor of The Authors of Plant Names, considered to be the worldwide standard in taxonomic description.Heywood, V. H. is the author of 'Flowering Plant Families of the World ', published 2007 under ISBN 9781554072064 and ISBN 1554072069.