1. Department of Molecular Evolution and Plant Systematics & Herbarium (LZ); Institute of Biology; Leipzig University; D-04103 Leipzig Germany
2. German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig; D-04103 Leipzig Germany
3. Institute of Biology, Geobotany and Botanical Garden; Martin Luther University Halle-Wittenberg; D-06108 Halle (Saale) Germany
4. Kunming Institute of Botany; Chinese Academy of Sciences; Kunming 650204 Yunnan China