THE COVERING TISSUES 



91 



Plate 33. — Surface Views of Leaf Epidermis. 



1. Hepatica leaf (wavy walls). 2. Chimaphilla leaf (beaded walls). 3. Hen- 

 bane leaf (wavy and striated walls). 4. Senna leaf (angled cells). 5. Convallaria 

 leaf (beaded walls). 



