2. Leaves I. Leaves A. Function B. Anatomy of a leaf 1. blades and petioles 2. leaf types 3. vein patterns 4. other features of leaves C. Leaves of grass D. Conifer leaves E. Modified leaves II. Inside leaves A. Cellular organization 1. epidermis 2. mesophyll: two parts a- palisade cells b- spongy cells B. Water loss- cuticles C. Stomata D. Sun leaves and shade leaves

3. I. Leaves A. Function B. Anatomy of a leaf 1. blades and petioles 2. leaf types CO 2 +H2OH2O >>>>>C 6 H 12 O 6 + O2O2 light energy chloroplasts/ chlorophyll blade petiole Simple leaf Compound leaf leaflets

4. B. Anatomy of a leaf 3. vein patterns 4. other features of leaves

5. B. Anatomy of a leaf

6. C. Leaves of grass Evolutionary pressures: fire herbivory mowing Intercalary meristems

7. D. Conifer leaves Western white pine Western redcedar Douglas fir epidermis sunken stomata thick mesophyll endodermis hypodermis waxy

8. E. Modified leaves bracts

9. II. Inside leaves A. Cellular organization 1. epidermis 2. mesophyll: two parts a- palisade cells b- spongy cells 3. veins: phloem and xylem B. Water loss- cuticles cuticle

10. C. Stomata

11. Stomata opening and closing

12. D. Sun leaves and shade leaves Shade leavesExplanation Cuticle Sun leaves [Chlorophyll] Aspect (horizontal/ vertical) Sunken stomata thin low (light) high (dark) verticalhorizontal yesno Hairyyesno thick

13. The end