1. Royal Botanic Gardens; Kew, Richmond Surrey TW9 3DS UK
2. The Linnean Society of London; Burlington House, Piccadilly London W1J 0BF UK
3. Centre for Plant Diversity and Systematics; The Harborne Building, School of Biological Sciences; University of Reading; Whiteknights Reading RG6 6AS UK
4. Department of Botany and Plant Ecology; Scientific Institute; University Mohammed V Agdal; BP 703 Rabat 10106 Morocco
5. Department of Biology; Laboratory of Ecology and Environment; Regional Herbarium MARK; Faculty of Sciences Semlalia; Cadi Ayyad University; PO Box 2390 Marrakech 40 001 Morocco
6. Global Diversity Foundation; Dar Ylane Marrakech Morocco