Acacia species ?

Acacia species ?;
 
 
 
 
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PLEASE ID:  I AM CONFUSE ABOUT IT
Look like Acacia species (may be Acacia suma)
... if found planted, one of the possibility is *Leucaena leucocephala* ...
Pl. validate the id of Acacia mellifera? 
Location: NBNP Garden,
Date: August, 2011
Habitat: Garden
Habit: Tree
Leaves shape and their arrangement do not support the ID. Can you send close ups of leaves or recheck the characters