CAPSELLA BURSA-PASTORIS. 227 



vi. With a needle gently break open the thecae, 

 and, mounting dry, note the abundance, color, 

 and pulverulence of \hz pollen. 

 ,i, r . Draw an uninjured stamen. 



6. The//jf///. In a just opened flower, note 



(7. The shape. 



b. The three parts, stigma, style, and ovary. 



c. The oi'ulfs. 



d. Draw an uninjured pistil. 



7. Construct a diagram (like fig. i) to show the relation 

 of the parts of the flower to each other. 



F. THE FRUIT. Taking the oldest well-formed pod, 



note 



1 . The shape. 



2. The median ridge of each flattened face extending into 

 the persistent style. 



In a transverse section of a pod note 



3. The partition formed by the inward projection of the 

 two placental 



Open a pod by pulling away the two valves from the 

 ridge, and note 



4. The shape of the valves. 



5. The membranous partition. 



6. The seeds. Note 



a. The funiculus and its attachment. 



b. The roughened surface, best seen in dry seeds. 



c. The shape, appearing curved upon itself, campy- 

 lotropous. 



d. Draw a seed showing its attachment. 



