228 



ELEMENTARY STUDIES IN BOTANY 



a node, and then the leaf from the next node above does not 

 arise directly over the leaf below (Fig. 194, A). If an im- 

 aginary line be drawn connecting the points on the nodes 



FIG. 196. An elm in foliage. 



at which successive leaves appear, it will form a spiral wind- 

 ing about the stem. Leaves with bhis arrangement, there- 

 fore, are said to be spiral (also commonly called alternate). 



