96 NATURE STUDY BY GRADES 



slowly? Do trees and shrubs bear seeds? What has be- 

 come of them? Will the cold of winter kill them? 



What plants have died? Have they borne seeds? What 

 has become of the seeds ? Will there be similar plants next 

 year? How are the seeds distributed? 



Are any plants found whose tops are dead, but whose roots 

 will live over the winter? Have they borne seeds? Plants 

 that live from year to year, like trees and shrubs, are called 

 perennials. Those that live but one year are called annuals. 

 Those that live two years, developing their seeds the second 

 year, are called biennials. Mention plants of each class. 



Experiment. Bring a small panful of earth to the 

 schoolroom; keep it warm and moist and see if any self- 

 planted seeds will grow, and how many. 



LESSON XX 

 DECIDUOUS AND EVERGREEN TREES 



Mention trees which shed their leaves in the fall. Make 

 a list of them. Do any trees retain their leaves all winter? 

 Name all such trees that you know. Which of the deciduous 

 trees are tall and slim ? Which of them are broad and spread- 

 ing? What is the general shape of the evergreen trees? 

 Draw a pine, a cedar, a fir, etc. ; an apple, a locust, an elm, 

 etc., to illustrate for the pupils the general character of 

 growth and shape ; or, better still, take the pupils out where 

 they can see these differences. 



What is the size, compared with the trunk, of the branches 

 of most deciduous trees? Where do they leave the main 

 trunk? At what angle do they leave it? Compare the 

 branches of the evergreen tree in the same particulars. 



