Casuarinaceae sp.

 Common name: Casuarina, She-oak 

Many are native to Australia and are evergreen with weeping, needle-like branchlets.  The flowers are hard to see but what follows are woody cones.  They are used as windbreaks, shade, shelter and soil binders and can be found in many places under many different conditions but will do particularly well if grown in an open sunny position.

 Distribution:

 Coastal headlands, swamps and riverbanks. 

Bibliography:
 

Better Homes and Gardens (2000) The Australian gardening Encyclopedia, Murdock Books, Sydney.

http://www.agridept.gov.lk/NBG/Casurina.htm