xiii FLOWER AND INFLORESCENCES 177 



(5) Give examples of the following kinds of inflorescences, and ex- 

 plain their relation to each other spike, raceme, panicle, head, umbel. 

 (1890.) 



(6) Describe and compare the inflorescences of the Wallflower, 

 Parsley, and Daisy. ( 1 893. ) 



(7) Briefly describe, giving examples, the following forms of in- 

 florescences, and point out the relation which exists between them 

 Spike, Spadix, Catkin. 



(8) Fully describe the inflorescence of any three of the following 

 plants Chickweed (Stellaria), Wallflower (Cheiranthus), Forget-me-not 

 (Myosotis), Deadnettle (Lamium), Foxglove (Digitalis). (1891.) 



(9) Describe the inflorescence of the Arum. 



(10) What is an involucre? What plants possess involucres? 



( 1 1 ) Explain how a bracteole differs from a spathe. 



