Have you ever played "20-questions?" Well, a dichotomous key is just like that. You are given two questions. Answer yes and the next question is completely different than if you answered no.
In the computer lab, today, to introduce different dichotomous key sites for tree identification. My favorite is a site maintained by Virginia Tech University. Go to my webpage. On the left side of the screen, in the gray column, are numerous links. It is in alphabetical order, so scroll down to "Leaf Identification Key." Go for it.
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