92 NATUBE-STUDY LESSONS. 



D. The Flower-stem and Flower. 



38. (a) Examine the plant in its early develop- 



ment. 



(3) What do you find closely nestled among the 

 leaves ? 



(c) Describe these buds as to shape and cover- 

 ing. 



(</) In their early stages, what purpose does the 

 position of the buds among the leaves 

 serve ? 



(^) Infer the use of the outer green parts. 



39. How many rows of such green parts do you find 

 in a flower-bud ? 



40. Examine flower-buds of several dandelions and 

 discover whether they always have the same number of 

 rings of green parts. 



These small green outer leaves are called iracis and the circle or ring 

 of bracts is called an involucre. 



41. Examine and describe the stem on which this bud 

 is found. 



Such a naked flower-stem is called a scape. 



42. {a) What change takes place in the position of 



the flower-bud as it develops? 

 {b) How is this eflected ? 



43. Observe a dandelion growing under the edge of a 

 stone or a board, and note the direction of the develop- 

 ment of the flower-stem. 



44. Observe also the dandelions growing in long grass 

 and in short grass, and note the relative lengths of the 

 scapes. 



