valentine] a TRir TO THE SAND DUNES 



51 



Figure 1.* — Top of dune held in place by vegetation. 

 Wind ripples and exposed roots are shown in tlie foreground. 



dune grows in height it covers the trunks of the trees and shrubs 

 which we find on them. The tree fights to maintain Hfe, and in 

 order to five it must keep its head above the top of the dune. 

 To enable it to gain 

 this end, nature has 

 provided it w^ith the 

 power of sending forth 

 new roots from that 

 part of the trunk which 

 has been buried, giving 

 the tree a new start. 

 The tree must not only 

 keep its top branches 

 above the sand in order 

 to retain life, but also 

 the sand about its roots 

 is equally as essential. 

 In Figure 3 we have an 

 illustration of the roots 

 sent forth from the tree 

 trunk. The roots of the 

 plant life tend greatly 

 to hold the sand about 

 them more or less com- 

 pact, but are not suffi- -r^ ^ \ i i > i r *i 

 V Figure 2. — A sand reed iiokhng the rem- 



cient proof, however, nant of a dune in place. 



photographs made by the student writing- this artick-. 



Illustrations are 



