The Arnold Arboretum of Harvard University achieves excellence in scholarship and contributes to the advancement of society as an international center for the study of plants. Integrating eminent living and archival collections for discovery and dissemination of knowledge to the students of Harvard University, local educational institutions, and the public, the Arnold Arboretum is a premier destination for deepening understanding and appreciation of plants, horticulture, and biodiversity.Occupying 281 acres, the Arboretum’s living collection of trees, shrubs, and woody vines is recognized as one of the most comprehensive and best documented of its kind in the world. The living collection is supported by comprehensive curatorial documentation, herbaria containing more than 1.3 million specimens, extensive library and archival holdings, and a 43,000-square-foot state-of-the-art research center. These facilities and holdings, along with 75 full-time staff, provide the basis for research and education by Harvard faculty and students, Arboretum scholars, and visiting scientists from around the world. Investigations focus on examining plant diversity from genomic, developmental, organismic, evolutionary, and ecosystem perspectives.