Comment by riffraff

when I was in school we had something called "dychotomic keys" which were big books to recognize plants with binary questions.

Does it have a leaves? yes/no go to page XXX/YYY Is the leaf oblong? go to page WWW/ZZZ Is the border smooth? go to..

I wish there was a plant identification app using _that_ system, it would be much more entertaining and educational to use.