no 



BOTANICAL GAZETTE 



[FEBRUARY 



contained in the spray, to which the plants are constantly exposed. 

 On sandy soils the protectional adaptations are caused more through 

 the physical conditions of the sand, than through the salt content of 

 the soil. The characteristic vegetation developed on all sand forma- 

 tions, inland as well as on the coast, is so much alike, that there is no 

 reason to assume that the sodium chlorid content of the sea shore, 

 which in fact is not very large, would be responsible for the aspect of 

 the vegetation on marine sand strands. On coastal marshes the con- 

 ditions are different, and this is also evident in the vegetation on such 

 formations, which in no way differs from that on saline marshes in 

 interior, .and always is composed of true halophytes. 



A series of samples of the soil was taken with earth-auger on the 

 beach and dunes at Fremantle, Western Australia, at various depth 

 and subsequently examined for soluble salts. The results appear in 

 Table XL 



the 



Date 



Dec. 1 8, '02 



Dec. 21, '02 



Formation 



Lower beach, 



upper limit 



Middle beach 



Border of mid- 

 dle and up- 

 per beach 



Upper beach 



Dune inside 



littoral dune 

 Littoral dune 



Dune marsh 



inside littoral 

 dune 



Middle beach 

 Same place 

 Upper beach 



u 



I 



-a 



fig 



3 s 



o 



5 



7 



10 



28 



l 5 



29 



8 



8 



14 



TABLE XI 



o 



U 



u 



Medium 



sand 

 Medium 



sand 

 Coarse 



sand 



Medium 



sand 

 Fine 



sand 

 Fine 



sand 

 Finest 



sand 



Medium 



sand 



Medium 



sand 

 Medium 



sand 





20 



35 



30 



30 



40 



40 



20 



50 



25 

 50 



o 

 73 



o 

 "5b 



*5 



21 



2 3 



26 



10 



30 



8 



8 



J 5 



u 



o 



I 



u 



ft 



a 



V 



18 



20 



20 



22 



23 



21 



19 



14 



12 



16 

 15 



J- 







B 



<u M 



9 

 6 



6 



4 



5 



4 



10 



4 



3 



3 



5 



1| 



bC 



8 



0.005 



0.004 



0.004 



0.009 



0.003 



0.007 



o . 005 



0.0 



06 



0.004 



0.011 



0.006 



Notes 



Sparse 

 vegetation 



Sparse 

 vegetation 



