m C. T. MUSSON AND W. M. CARNB. 665 



duty of supplying water to the higher parts of the tree; or it may 

 be that they operate specially during drought. We are disposed 

 to think the former is the more likely. 



We have not succeeded in finding any published references to 

 the occurrence of adventitious roots in any species of Melaleuca. 



EXPLANATION OF PLATES XVIU.-XIX. 



Plate xviii. 

 Melaleuca linariifolia Sm. 

 Photograph of portion of a stem, showing the bark with " adventitious 

 roots;" in the lower part the outer bark has been cut away to show the 

 penetrating habit(College Farm). 



Plate xix. 



Photograph of an old tree(Rickaby's Creek) showing Banyan-like 

 arrangement of large adventitious roots, which have become stems through 

 ^entering the soil and rooting. 



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