96 NATXTBB-STUDY LESSONS. 



68. Describe the remaining parts of the flower found 

 on the face of the corolla. 



The part divided at its "upper extremity into two curved parts is called 

 the siigy/ia, and the stem upon which the curved stigma is borne is called 

 the siyle. 



69. (a) Examine the stigma and style under a lens. 



(d) Where does the style arise from ? 



The yellow bodies below the stigma, and which form a hollow cylinder 

 about the style, are anthers and the yellow powder they produce is called 

 fallen. 



70. Describe the surface of the style and stigma. 



71. {a) Examine a very young flower towards the cen- 



tre of the head. Can you see the stigma ? 

 (b) Carefully observe these young flowers as they 

 develop and note how the stigma and style 

 develop. 



72. When does the stigma open into its two curved 

 parts ? 



'J'}). Where have the style and outer part of the stigma 

 obtained the pollen you find adherent to them ? 



74. («) Do you find pollen on the stigma as you do 



on the style? 

 {b) Why is this ? 



75. Whether, does the stigma mature, or the anthers 

 shed their pollen, first ? 



"jS. Examine more carefully the surface of the outer 

 part of the stigma and style and account for the amount 

 of pollen adherent to them. 



The pollen must come into contact with the stigma before seeds are 

 formed in the ovary. 



'JJ. (a) Observe what insects visit the dandelion. 

 Why do they visit it? 



