MITIGATION OF FLOODS IN THE HUNTER KIVER. 121 



5. Tristania conferta, R. Br. The " Brush or Bastard 



Box," which requires a good depth of moist soil for its 

 full development. It is perhaps better known under 

 its nursery name of " Lophostemon." 



The following are exotic trees : — 



6. Acer negundo, Linn. The " Box Elder " of the United 



States, a deciduous Maple which affords an excellent 

 summer shade. 



7. Ailanthus glandulosa, Linn. A native of Asia which 



has several merits. Goats and other animals do not 

 enjoy browsing upon it. Not only will it grow on the 

 banks of rivers and bind them with its suckering roots, 

 but it is one of the few that will flourish in the almost 

 pure sand of the coast and of the Hunter River estuary. 



8. Platanus orientalis, Linn. The " Oriental Plane," 



native of Europe and Asia. A noble tree which can 

 be propagated by cuttings or seeds. 



9. Populus angiilata, Ait. The "Water Poplar" of the 



Eastern United States, so called because of the damp 

 situations in which it flourishes. 



10. Robin ia pseud-acacia, Linn. A native of the United 

 States, and commonly known as "Acacia." It is 

 remarkably tolerant to heat and cold, lack of moisture 

 and plenty of it, and to poverty of soil. It will bind 

 shifting sand. 



11. Salix babylonica, Linn. The common or "Weeping 

 Willow," which is perhaps the best of all trees for 

 consolidating river banks. Its roots form a net-work 

 which bind soil, it will grow by the very brink of a 

 stream and its pendulous branches that are broken 

 down by the floods and winds take root lower down the 

 stream. 



12. Taxodiam distichum, Rich. The "Virginian or Swamp 

 Cypress," which in its native country flourishes in 



