It's not quite what you want, but I worked on Leafsnap [1], which automatically identifies trees by their leaves, using computer vision techniques. We focused o

It's not quite what you want, but I worked on Leafsnap [1], which automatically identifies trees by their leaves, using computer vision techniques. We focused on leaves since they are present throughout much more of the year than flowers. Our free apps also include high-resolution, high-quality photos of all aspects of the species we cover -- leaves, flowers, fruits, bark, etc. So you can at least browse through and compare the flowers you're looking at with those in the app. Our current coverage is of the trees of the northeast US (about 200 species), but we are working on expanding that. [1] http://leafsnap.com http://leafsnap.com