Dichotomous Key for Leaf Classification 1. a. Compound leaf
b. Simple leaf
2. a. Palmate (lobed leaves that radiate from a central point).
b. Pinnate (leaflets on either side of a stem).
3. a. Leaflets taper to pointed tips..
b. Oval leaflets with rounded tips...
4. a. Leaf veins branch out from one central point...
b. Leaf veins branch off of main vein in the middle of the leaf
5. a. Leaf is heart-shaped
b. Leaf is star-shaped
6. a. Leaf has jagged (toothed) margin.
b. Leaf has smooth (untoothed) margin..
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Aesculus
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Carya
Robinia
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Cercis
Liquidambar
Betula
Magnolia
O
Smooth
Serrated
Undulated
Lobate