l.-i'J 



in such spots the live oak, Qncrcus virgiuiana, forms low and con- 

 torted thickets, over which twines the yellow jessamine {Giiseinuim 

 scvipennniis). 



A photograph of the dunes taken from their inmost edge is 

 given in Fig. 2. In the center of the photograph, between the 

 palmettoes is a large clump of Phytolacca dccaiidra ; sea-oats 

 [Uniola) occupy the ridges in background; in foreground is 

 Ccnchrus tribiiloides. In foreground to left is shown half of a 

 plant of Salsola Kali. 



As mentioned above, the dunes terminate at this part of the 

 island in a high unstable ridge which is in places being constantly 



Flc. 2. Sand-dunes from inmost edge, Isle of Palms, S. C. Sec text above. 



extended landward by the pouring of sand down its inner slope. 

 The inward advance of the dunes, however, has not been suffi- 

 cient, so far, to cover to any extent the forest behind and produce 

 the " graveyards " of trees that are so conspicuous at some 

 places along our coast. 



Even where the sand is in motion, a nimiber of vines nearh' 

 always succeed in gaining a position on the incline, and though 

 constantly covered by the moving sands their tips as constantly 

 emerge and continue their growth. The vines that most suc- 

 cessfully contended with this shifting sand were At)ipilopsis ar- 



