234 THE TEACHING BOTANIST 



The microscope must be used. After examining 

 the pollen dry, add water, and observe the effect. 

 After examining the ovules, placed on a slide 

 in water, as fully as possible, add potash, which 

 may make their structure clearer. 



53. What is the exact structure of the Scilla flower ? 



(1) Of what distinct parts is it made up ? 



(2) In what relative positions are these arranged ? 

 In addition to your drawings, construct diagrams 



which shall show in ideal horizontal section the 

 ground plan of the flower, and in ideal vertical 

 section, the vertical plan. In each case repre- 

 sent sections through the most typical parts of 

 the structures. The two diagrams are comple- 

 mentary to each other, and one need not repeat 

 what the other shows. 



54. In your earlier studies you have found that the 



flower originates as a branch does, i.e. from an 



axillary bud. 

 In what way does the Scilla flower answer to a 



branch, i.e. in what way have stem and leaves 



altered their shapes and positions to form the 



parts of the flower ? 

 Represent by diagrams the intermediate stages 



between leaves and the parts of the flower. 



55. What is the function of each part of the flower? 



56. After the same manner study the Hyacinth flower. 

 Represent by diagrams only. 



