312 



TYPICAL FLOWERING PLANTS 



Figure 331. — Fruits Distributed 

 by Wind. 



but little range would 

 be added to the plant's 

 territory, and a small 

 increase in the number 

 of plants would take 

 place. Such plants as 

 the dandelion and bur- 

 dock have developed the 

 most successful means 

 for gaining the distri- 

 bution of seed, and 

 are, therefore, the most 

 common and most widely distributed. 



Seeds may be distributed by an explosion of the fruit 

 case or through the agency of the wind, water, or animals. 



Some plants, like the witch- 

 hazel or jewel- weed, have a fruit 

 the tissue of which is so strained 

 at the time of ripening that the 

 seed case bursts with an explo- 

 sion which throws the seeds some 

 distance from the parent plant. 



Figure 332. — Other Fruits 

 Distributed by Wind. 



a, catalpa ; b, dandelion ; 

 c, milkweed. 



Figure 333. — Fruits and Seeds. 



