Leafsnap has languished for years on my phone. The app represents the sort of big audacious online project that we as librarians need to know about. Merging geographic location with image recognition, it combines reports from the field to produce an interactive electronic guide.
For the end user, Leafsnap is designed to make a “best guess” about the species of a plant, based on an image of a leaf you upload or input through the camera. I hadn’t been able to use it before last week. It’s limitation? Spearheaded by the Columbia University, the University of Maryland, and the Smithsonian Institution, Leafsnap is crowd-sourced, and a caveat warns that the database best reflects the northeasten U.S. for the time being (though there is a U.K. version, too). When I heard someone speculating about the name of a specific tree while I was in Massachusetts, I was happy to put the tool to work.