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Winter Twig Key

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This interactive key to deciduous trees is based on winter twig images and is modified from a dichotomous key by E. Lucy Braun.

Winter Twig Key combines side by side images of twigs with contrasting features emphasized by text and field marks. You choose the image that has the general feature most like the twig you are trying to identify and click on the image to display a new page with more choices until an identification to genus is reached.

At the top of each page, the previous descriptive feature chosen is restated to make rechecking easier if neither of the new features seem to fit your twig. A Back button allows you to retrace your steps if you wish to examine prior choices. Hypertext definitions are available for terms that you may be unfamiliar with. An optional tutorial on twig features is also provided.