Photographic Collections
Over 25,000 images, dating from 1870 to the present, make up the library's photographic collection. Many of these images document the Arboretum's living collections and record the development of taxa within the collections.The collection includes three special online exhibits
- Cienfuegos Botanical Garden, Cuba
- Botanical and cultural images of Eastern Asia from the Arboretum archives
- The Arboretum Through Time, Historical Landscape Images which captures and records the evolution of this landscape and its living collections since 1889.
- South Central China and Tibet: Hotspot of Diversity provides access to the natural history and ethnographic collections that resulted from Arnold Arboretum expeditions to China and Tibet between 1924 and the present.

Other important series include photographs as early as 1906 of collecting expeditions to China, Korea, Japan, Tibet, and other parts of the world from which Arboretum plants have been collected.
Selected photographs are cataloged in Harvard's Visual Images Access database, VIA.

