Viviane Perraudin finished her Master Thesis at the University of Fribourg (Department of Biology). Her research interests include the biogeography and conservation biology of Ptilostemon greuteri (Asteraceae). The main goal of the project is to ensure the long-term conservation of this critically endangered and endemic woody species of Sicily. As the species has been discovered and described only recently (2006), many aspects of its biology, biogeography and conservation needs are poorly understood.