1. Department of Ecology and Evolution; Biophore, University of Lausanne; CH-1015 Lausanne Switzerland
2. Swiss Institute of Bioinformatics; Quartier Sorge; CH-1015 Lausanne Switzerland
3. Landscape Dynamics; Swiss Federal Research Institute WSL; CH-8903 Birmensdorf Switzerland
4. Jodrell Laboratory; Royal Botanic Gardens, Kew; Richmond Surrey TW9 3DS United Kingdom
5. Unit of Ecology and Evolution, Department of Biology; University of Fribourg; Chemin du Musée 10, CH-1700 Fribourg Switzerland
6. Insitute for Systematic Botany; University of Zurich; 8008 Zurich Switzerland