ROADSIDES AND NEGLECTED CORNERS 



61 



habit, thinner, more deeply cut and curled leaves, and 

 less rigid prickles. The teacher should show both plants 

 at the same time. 



FIG. 16. LEAF, FLOWERING HEAD, AND ROOTSTOCK OF CANADA 



THISTLE. 

 One-half natural size. 



Note the fall migration of birds ; hibernation of amphibians, reptiles, insects. 



