Database of 116,00 plant images, searchable by color, location, name, and photographer. Most photos are available for non-profit use. See usage and permissions page
elib.cs.berkeley.edu/photos/use.html for more information.
Henriette's Herbal Homepage
This site from Finnish herbalist, Henriette Kress, includes over 2700 plant images, organized by Latin name. For information on use of images, see "fine print" link:
Database of medicinal plant information from the Alternative Medicine Foundation. Individual plant pages include links to image sour
Includes over 14,000 images. Searchable by common or botanical name.
Plants Gallery - USDA Plants Database
Database of images of select US plants. Searchable by a variety of fields including common and scientific name, growth habit, and nativity status. See intellectual property statement link for information about commercial and educational/non-profit use of images.