Wild Lettuce 
A comparison between this and the large leaved, compact, 
salad plant of our gardens shows the wonders of adaptation 
which cultivation works. This wild lettuce is known in some places as 
the “compass plant” because of the fact that its leaves, instead of 
fanning out in all directions from the stalk, point always 
north and south—an adaptation, no doubt, to protect 
the plant from the heat of the mid-day sun, 
