258 



A TEXT-BOOK OF BOTANY 



a small root system in light or sandy soil. When the work 

 of the season is over, and the absorbing rootlets have 

 shriveled, the plant is 

 easily broken from its 



FIG. 254. Seed of milkweed with 

 tuft of hair. After GRAY. 



FIG. 255.- 



-Seed of willow herb with tuft 

 of hair. 





FIG. 256. A common tumbleweed. 



