NATURE-STUDY LESSONS. 95 



58. Pull apart sidewise one of these flower-heads of 



the dandelion and note its formation. 



Each of these small separable parts with the bright yellow strap is a 

 perfect flower. A collection of flowers crowded on the end of a flower- 

 stem, as in this case, is called a iead. 



59. Name any other plants that have their- flowers 

 arranged in heads. 



60. (a) Separate one of these flowers from the head. 

 (d) Describe the several parts. 



61. (a) Find the part which develops into the seed. 

 (3) Examine this part with the aid of a lens. 



(c) Describe this part as to shape and surface. 



(d) Make a drawing of this part. 

 This part of the flower is the ovary. 



62. {a) Find the hairy part of the flower attached to 



the ovary. 

 (fi) Note to which part of the ovary it is attached. 



63. {a) As the flower develops what change takes place 



in this hairy part ? 

 {b) What purpose is served by this part ? 



64. Make a drawing of a seed, with the hairy attach- 

 ment, as the whole is carried by the wind. 



65. What purpose is served by the hooks on the sur- 

 face of the seed? 



This hairy part growing from the upper end of the ovary corresponds to 

 the calyx in some other kinds of flowers. 



66. (a). Examine the colored part of the flower under a 



lens. Describe it as to color, shape and origin. 



(6) How many points are there at its upper end ? 



This part of the flower is the corolla and the five points indicate that it is 

 composed of five petals united. 



6^. Where does the corolla rise from ? 



