1. Department of Ecology Facultad de Ciencias Universidad de Granada Avda. de la Fuentenueva s/n Granada 18071 Spain
2. Estación Experimental de Zonas Áridas EEZA‐CSIC Carretera de Sacramento s/n La Cañada de San Urbano 04120 Spain
3. UMR 5175 CEFE – Centre d'Ecologie Fonctionnelle et Evolutive (CNRS) 1919 Route de Mende Montpellier Cedex 05 F‐34293 France
4. Harvard University Herbaria 22 Divinity Ave. Cambridge MA 02138 USA
5. Department of Biology McGill University Stewart Biology Building, 1205 Ave. Docteur Penfield Montreal QC Canada H3A 1B1
6. Département des Sciences Biologiques Université du Québec à Montréal Succursale Centre‐ville Montréal QC Canada H3C 3P8
7. Department of Ecology, Evolution & Behavior University of Minnesota 1479 Gortner Ave Saint Paul MN 55108 USA
8. Department of Biology & Ecology Center Utah State University Logan UT 84322 USA
9. Department of Biology University of Kentucky Lexington KY 40506 USA
10. Department of Plant and Soil Sciences University of Kentucky Lexington KY 40546 USA