Research professor at the Spanish National Research Council (CSIC) and vicepresident of the International Association for Plant Taxonomy (IAPT). Formerly, director of the Royal Botanic Garden of Madrid, president of the International Organization of Plant Biosystematists (IOPB) and Council member of IAPT. His research uses a broad systematics frame to generate questions regarding patterns of biodiversity, drivers of speciation and underlying evolutionary processes, particularly natural hybridization.
