Photo by] [E. Step. 



FIG. 243. IVY (Hedera helix) DESTROYING OAK (Quercus robur). 



The Ivy, whose thick stem is here seen twining around the trunk of the Oak, is innocent until it has reached the upper 



branches of its host. Then, by developing numerous bush-like branches, it shuts out the light and air, and starves 



the Oak. Many a fine tree is kUled in this manner, owing to the neglect of a little care in our woods. 



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