86 NATURE-STUDY LESSONS. 



24. (a) How many parts are white or purple? 

 (d) Draw one of these parts. 



(c) Describe it. 

 Where convenient cut these forms out of white paper. 

 One of the leaves of the inner whorl of flower-leaves is called a ^etal 

 and the whorl of such leaves is the corolla. 



25. {a) Examine the green parts of the flower. 



(p) Distinguish between the green leaves of the 



flower and the green leaves of the stem. 

 (c) How many green leaves has the flower ? 

 {d') Draw and describe a green flower-leaf. 



One of the leaves of the outer whorl of flower-leaves is a sepal and the 

 whorl of such leaves is the calyx. 



26. Compare sepal and petal as to color, shape, apex 

 and point of attachment. 



27. (a) Contrast the position of the calyx in the flower- 



bud with its position in the open flower. 

 (i5) Infer the use of the green flower-leaves. 



28. Discover the adaptation in the sepal being wide 

 below and the petal wide above. 



29. («) Observe trilliums closely for some time and 



note what insects, if any, visit the flowers. 

 (V) Describe the position of the insect when you 



saw it in the flower. 

 {c) Infer from the position and action of the insect 



why it has visited the flower. 

 (^) Observe closely the insect as it leaves the 



flower. What do you notice on its body? 

 {e) Discover where and how it got this yellow 



powder. 



This powder is called /«//«« and the small bodies within the flower from 

 which the pollen comes are called anthers. The stems on which these 

 anthers are borne are c3!As.& filaments and the whole composed of filament 

 and anther is called a stamen. 



