NATURE-STUDY LESSONS. 87 



30. {a) Make a drawing of a stamen. 



(J>) How many stamens are there in the trillium ? 

 (c) Where are they attached ? 



3 1. (a) Discover whether the flowers have any odor. 

 {b) Are the odors of different kinds of trilliums 



the same .' 



32. (a) Discover, if possible, the two means by which 



insects know of the positions of flowers. 

 {b) Infer one use, at least, of the corolla. 



33. What other purposes are served by the color and 

 odor of flowers ? 



34. (rt) Describe what else besides calyx, corolla and 



stamens you see in the flower. 

 {b) With a sharp knife cut this part across where 



it is thickest, 

 (c) How many cavities do you find ? 

 {d) What do you find in these cavities ? 



35. Observe a trillium until the fruit develops, and 

 discover what these little white bodies in the cavities 

 become. 



'1 his central part of the flower is called the pistil and the little enclosure 

 containing the white bodies the ovary. 



The insect and the flower assist each other. The flower provides food 

 (pollen and honey) for the insect, and in return for this the insect per- 

 forms an important work for the plant. It is the means, through carrying 

 pollen from one flower to another, of helping the flower make seed out of 

 these little white bodies found in the ovary of the flower. This will be 

 studied more fully later. 



XXIV.-THE DANDELION. 



A continuous study of this plant should be made from its first appearance 

 in the spring till it has ripened and shed its seeds. 



1. Does the dandelion grow in the bright sunlight or 

 in the shade? 



2. When do the leaves first make their appearance in 

 your district ? 



