244 THE TEACHING BOTANIST 



with brushes, etc., the operations of the insect in particular 

 flowers. The teacher can find facts on the mode of cross- 

 pollination of many common flowers in Mtiller's "Fertilization," 

 and with this as a basis can make valuable demonstrations to 

 the class. A lecture or talk, illustrated by diagrams, upon this 

 most interesting of subjects will be appreciated and have great 

 meaning at this stage. 



XVI. The Morphology and Ecology of the 

 Flower. - - Continued 



64. In each of the ten flowers supplied, what is the 



identity of each visible part ? 



Answer by annotated sketches. 



Can you trace any special adaptations to cross- 

 pollination ? 



65. In the flower clusters, in what positions do the 



younger flowers stand relatively to the older ? 

 Can any connection be traced between the size of a 



cluster and the size or number of the blossoms 



composing it ? 

 What does a cluster probably mean in connection 



with cross-pollination ? 



66. Construct a series of diagrams, using colors, to 



show the intermediate stages in the development 

 from a simple conical vegetative point of 



a. A flower with all parts distinct. 



b. A flower with superior ovary, but the other 



parts united into a tube. 



