126 How Vegetation is extended. 



geraniums; by dividing or separating roots, 

 tubers, and bulbs, as the strawberry, potato, 

 dahlia, and hyacinth ; and by grafting. 



132. Grafting is the insertion of a cutting or bud of one 

 plant into a branch or stem of another. 

 This is often done with rose and fruit 

 trees. 



J 33- Vegetation is extended 

 over the land not only by men, 

 but also by the winds, streams, 

 ocean-currents, birds, bees, etc. 



Seed of a Maple Tree, Full Size. 



1 34. Many seeds are provided 

 with a kind of wing or some 

 light substance, and are scat- 



seed of the Thistle. 



Pern, with Spore.. 



tered far and wide by the winds, 

 as those of the ash, elm, and 

 maple trees, the thistle and the 



dandelion. 



