ROOTS 97 



How do you account for the fact that willows usually grow 

 along streams? How does the strawberry plant spread? 

 How does the grower of small fruits make use of this pecul- 

 iarity of the strawberry plant? Examine the long shoots 

 of a black raspberry bush late in the summer. What has 

 taken place where these long shoots have touched the 

 ground? Examine a plant of " Old-hen-and-chickens." 

 How does it spread? Find out what are runners, stolons, 

 and offsets. What plants propagate themselves in each 

 way? 



88. ARTIFICIAL PROPAGATION 



Object. To learn how plants may be propagated by 



offsets. 



Apparatus. Some sets of onions or the little black bulblets 

 of the tiger lily, soil, etc. 



Method. Examine the offset. What does it look like? 

 Plant it in a flowerpot of damp soil and cover it to prevent 

 drying. 



Conclusion. How may onions and tiger lilies be propa- 

 gated? 



Note. Late in summer examine the stems of the cinnamon 

 vine and find the little tubers resembling potatoes by means of 

 which that plant propagates itself. 



89. ROOTS 



Object. To discover the use of the shin to a root. 

 Apparatus. A parsnip root and a dish of water. 



Method. Allow the parsnip to lie in a warm, dry place 

 for some time. After it has become quite soft and flexible 

 EXP. EOT. 7 



