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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 



i 



FIG. 254. Seed of milkweed with FIG. 255. Seed of willow herb with tuft 

 tuft of hair. After GRAY. of hair. 



FIG. 256. A common tumbleweed. 



