474 COMPOSITyE 



plants. It should be left out of all grass mixtures where the 

 produce is to be mown. 



Ex. 246. — Dig up and examine a complete plant of yarrow in flower. Note 

 the character of the rootstock, its tough stem and much divided leaves, and 

 its corymbose collection of small capitula. 



Carefully examine a single capitulura, noting the number and form of the 

 ray and disk florets respectively. 



Examine the fruits of yarrow. 



