The Arnold Arboretum Horticultural Library and Archives is a specialized research collection devoted to the study of temperate woody plants. We collect works on botany, horticulture, floras, landscape studies, garden history, and dendrology. The library stewards more than 40,000 volumes in Jamaica Plain and at the Harvard Book Depository. The Visual Image Collection contains more than 80,000 photographs, including a significant historical image collection. The Archive Collection documents the Arboretum’s history and is a repository for nineteenth, twentieth, and twenty-first century horticultural and botanical collections.