The understanding of plant diversity and resources has never been more important. As we face the unprecedented challenges of climate change and environmental degradation, effective environmental surveillance and conservation depend upon detailed knowledge of plants and their habitats. This programme is run jointly by the University and the world-renowned Royal Botanic Garden Edinburgh (RBGE). The RBGE is home to one of the world's best living collections of plants (15,000 species across four sites, amounting to five per cent of known world species), a herbarium of three million preserved specimens and one of the UK's most comprehensive botanical libraries. The programme is good preparation for roles in taxonomy, while many graduates have also continued to PhD studies. Past students have entered a wide variety of jobs at research institutions, conservation agencies and elsewhere.