Complete a dichotomous key for the 10 leaves on the Common Leaves sheet. The chart provided here allows for 11 pairs of statements. Depending on how you build your dichotomous key, you may or may not need all of them, or you may need to add some.
Hi and welcome to QuestionCove! It would be helpful for us to see what statements you're working with for your chart. At most, I can give you general advice about dichotomous keys. Generally, you'll want to pair the statements in a way so that you can always follow a path of statements to get to the proper identification, for every possible identification. It may also help for you to work backwards from each possible identification back up to the statements. I'd be happy to give you more detailed guidance, but I won't be able to do that without seeing the statements (and maybe the leaves as well) =D
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