1909) 



OLSSON-SEFFER— VEGETATION ON SEA SHORES 



117 



by the sand carried by the wind. While the wind in itself dries 

 the plant, the sand particles, which often have a high temperature, 

 are still more apt to increase the evaporation, and thus to hinder the 

 development of the plant (fig. 4). Further, stems of plants growing 

 on exposed places on coastal sands are often eroded by the sand, and 

 even the green leaves are sometimes cut into shreds during severe 

 storms by the sharp angular sand grains. 



1 



» 



at New 



1 Ttf** T^ *** 



Brighton C~" ° f Wlnd ° n Le P tos P erm ^ m scoparium Forst. on dunes 



' Lanterb ury, New Zealand. (Photograph by Dr. L. Cockayne.) 



sand^ 1 * SEDIMENTS -— As we have pointed out in another place 

 mouths eSpedally likel >' t0 accumulate in the neighborhood of river 



on th ' and m SUCh places heavy floods often carry down and deposit 

 ^il alr^ COnsiderable quantities of mud, which then enrich the 

 txchT L ° aUSe the a PP e arance of a quite new flora, that soon will 



On al tme Sand Plants - 

 asho^ bvT* dl marine coasts quantities of seaweeds are thrown 



po^ and h ™* y ** 1 bUt in Warm climates the y are s0 ra P id ty decom " 



the remains wa^Viorl o«n„ tv,o* ™ o^nmnlntinns can be 



