1. Biology

2. Tools Dichotomous Key Di- Two Chotomous- Forks or Branches Used to identify…… Region Specific

3. Deciduous Tree Key  Deciduous- to shed all leafs on an annual basis/ usually a broad leaf tree.  Bark vs. Leaf Characteristics

4. Deciduous Tree Key  Fall Leaf Color?

5. Deciduous Tree Key  Basic Leaf Anatomy

6. Basic Leaf Anatomy  Blade- Green or colored region of the leaf. Extends from the tip to the base.  Tip- Top of the Blade  Base- Bottom of the Blade  Mid Rib / Main Vein- all mid ribs are main veins but not vice versa.  Margin- Edge of Blade  Petiole- Stalk that may or may not be present.  Stipule- Bud that marks the point of attachment of a single leaf to the stem.  ***When counting leafs, count stipules not blades.

8. Main Vein / Mid Rib  Main vein- any dark thick easily seen vein.  Mid rib- a main vein that divides the blade in half

9. Leaf Characteristics 1. Leaf Arrangement- How the leafs are arranged on the stem. Alternate- Not opposite Opposite- across from each other. ○ M- Maples ○ A- Ashes ○ D- Dog Wood ○ Horse- Horse Chestnut

11. 2. Leaf Type- how many blades per stipule. Simple- one blade per stipule Compound- more than one blade per stipule

14. HW  Draw a branch showing four alternatively arranged simple leafs.

15. 3. Types of Compounding Palmate- “Fingers extending from your palm.” Pinnate- not palmate ○ Leaflet- Blade on a compound leaf ○ Note- Terminal Leaflet ○ Note- Lateral Leaflet

17. 4. Venation- Vein Arrangement Palmate Pinnate

18. 5. Lobbing Lobe- section of the blade created by deep indentations in the margin. Palmate Pinnate Maple Leaf Oak Leaf Palmate Vein= Palmate Lobed

19. 6. Margin Type Entire- Smooth Toothed ○ Finely ○ Coarsely ○ Compound  See Drawing

22. 7. Blade Attachment Non-Sessile (Stalked) ○ Contain a petiole Sessile ○ Contain no petiole See Diagrams 

23. 8. Lopsided leafs / Notched leafs and Leaflets Lopsided Leafs- associated with simple leafs Notched Leafs and leaflets ○ Associated with complex leafs.