EXERCISE 5 (Continued) 



FIG. 7. A rhizome. The underground stem of Solomon's seal. (Cook's Applied Economic Botany.) 



HBBHHHBIHB 



\ 



FIG. ,& A tuber as shown by the potato. (Cookf^ Applied Economic Botany.) 



E. Rhizome (underground stem). Examples: Kentucky blue grass> 

 Canada thistle, quack grass (Fig. 7). 



F. Tuber. Example! Potato (Fig. 8)V ! ^' 

 20 



