4 2 
THE GARDEN OF THE WORLD 
planted somewhere so that they can grow. The 
burdock, a plant that produces burrs, usually 
Why do burrs grows in thick patches. The space is crowded 
stiC k? with plants, and there isn’t much space for new 
ones. The plant provides that its offspring 
gets far away and starts life in a new place, 
The many different \inds of burrs have just one 
purpose—to be carried somewhere 
where there is not so much struggle for light 
and ground space and moisture. Its way of 
accomplishing this is to have little hooks on its 
seed pods. When a boy and his dog run through 
