1. Department of Ecology and Evolution; University of Lausanne; Lausanne CH-1015 Switzerland
2. Laboratory of Evolutionary Botany; Institute of Biology; University of Neuchatel; Emile-Argand 11 Neuchatel CH-2001 Switzerland
3. Vital-IT; Swiss Institute of Bioinformatics; University of Lausanne; Lausanne Switzerland
4. Musée et Jardins botaniques cantonaux vaudois; Lausanne CH-1007 Switzerland