Arnold Arboretum of Harvard University:Visual Archives

http://www.arboretum.harvard.edu/library/image-collection/

The Arnold Arboretum of Harvard University is home to a vast digital archive featuring photographs of plants and trees from around the world, along with a number of historical photographs of the arboretum itself. Collectively, these photographs "trace the evolution and management of the Arboretum's landscape, record individual taxa in the living collections, and capture these same plants growing in their native habitats." These images are arranged into interactive galleries for easy, enjoyable browsing. In one such gallery, the Arnold Arboretum Plant Image Database, visitors can browse Plant Images and filter their searches by season or by Character (e.g. bark, flower, insect), allowing visitors to observe each plant in detail and see how they change throughout the year. In another interactive gallery, visitors can browse through 42 images taken in South Central China and Tibet, including close-up photographs of plants taken by botanist Joseph Rock in the 1920s. In total, the Arnold Arboretum Visual Archives contains over 65,000 images.

via https://scout.wisc.edu/archives/r47731/arnold_arboretum_of_harvard_universityvisual_archives