1. Terms for use with a Dichotomous Key for trees

2. Coniferous or Deciduous
Coniferous: Tree has needles
Deciduous: Tree has broadleaves

3. Opposite or Alternate branching
Opposite branching
Alternate branching

4. Compound or Simple Leaves

5. Compound Leaves
Pinnately Compound
Palmately Compound

6. Margins of Simple Leaves
Entire Serrated Lobed

7. Leaf margins
Entire Toothed Double toothed

8. Lobes
Pinnately Palmately Not lobed

9. Leaf Base
Heart Shaped Uneven heart shaped Not heart shaped

10. Veins
Pinnately veined Palmately veined

12. Parts of a Leaf
Blade- main body of the leaf
Stomata- small openings in the leaf that help cool the plant through Transpiration; 90% of the water a plant absorbs is lost through transpiration
• Petiole- small stem-like structure which attaches the blade to the main plant stem; basically an extension of the midrib

15. Online Tree Keys