CAPSELLA BURSA-PASTORIS. 233 



Mount a portion of the epidermis of both surfaces of the 

 leaf, and note 



5. The epidermal tissue. 



a. Shape of the cells. 



b. Hairs of two kinds. 



c. Stomata, comparative abundance on the two sur- 

 faces. 



d. Often dark sheaf-like masses of raphides, torn out 

 from underlying cells. 



e. Illustrate with drawings. 



D. THE FLOWER. 



1. The sepals. Mount a sepal, examine with a high power, 

 and note 



a. Venation. 



b. Epidermal cells, their shape and striation. 



c. Presence or absence of stomata. 



d. Make a drawing, showing these characters. 



2. The petals. Mount a petal, and note 



a. Venation. 



b. Epidermal cells of the tip and base, their shape and 

 striation. 



c. Presence or absence of stomata. 



d. Draw. 



3. The stamens. Make a transverse section through a fil- 

 ament and also through an anther of an advanced bud, 9 

 examine with a high power, and note 



a. The structure of the filament. 

 i. The epidermis, 

 ii. The parenchyma beneath. 



9 This can best be done by making a section of the entire bud. 



