1. Department of Systematics and Evolutionary Botany, University of Zurich, 8008 Zurich, Switzerland.
2. Research group on Plant Biology under Mediterranean conditions, Department de Biologia, Universitat de les Illes Balears (UIB) - Agro-Environmental and Water Economics. Institute (INAGEA), 07122 Palma, Spain. Email:
3. Institute of Molecular Plant Biology, ETH Zurich, 8092 Zurich, Switzerland. Email:
4. Department of Systematics and Evolutionary Botany, University of Zurich, 8008 Zurich, Switzerland. Email