Repeatedly Northwards and Upwards : Southern African Grasslands Fuel the Colonization of the African Sky Islands in Helichrysum (Compositae) - Blanco-Gavaldà, Carme (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Galbany-Casals, Mercè (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Susanna, Alfonso (Institut Botànic de Barcelona) ; Andrés-Sánchez, Santiago (University of Salamanca. Department of Botany and Plant Physiology and Plant DNA Biobank) ; Bayer, Randall J. (University of Memphis. Department of Biological Sciences, Center for Biodiversity) ; Brochmann, Christian (University of Oslo. Natural History Museum) ; Cron, Glynis V. (University of the Witwatersrand. School of Animal, Plant and Environmental Sciences) ; Bergh, Nicola G. (South African National Biodiversity Institute) ; Garcia-Jacas, Núria (Institut Botànic de Barcelona) ; Gizaw, Abel (Addis Ababa University. Department of Plant Biology and Biodiversity Management) ; Kandziora, Martha (Charles University in Prague. Department of Botany) ; Kolář, Filip (Academy of Sciences of the Czech Republic) ; López-Alvarado, Javier (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia) ; Leliaert, Frederik (Meise Botanic Garden) ; Letsara, Rokiman (Herbarium of the Parc Botanique et Zoologique of Tsimbazaza) ; Moreyra, Lucía D. (Institut Botànic de Barcelona) ; Razafimandimbison, Sylvain G. (Swedish Museum of Natural History. Department of Botany) ; Schmickl, Roswitha (Institute of Botany, Academy of Sciences of the Czech Republic) ; Roquet, Cristina (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)