1. CFE, Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, Coimbra, Portugal
2. Department of Botany, Faculty of Pharmacy, University of Santiago de Compostela, Galicia, Spain
3. Department of Integrative Biology, University of Guelph, Guelph, Ontario, Canada
4. Botanic Garden of the University of Coimbra, Calçada Martim de Freitas, Coimbra, Portugal