Such a lovely hue–these flowers called gaway-gaway (pronounced as ga-wai ga-wai).  These are the blooms from a small tree with the same name.  A sister specie produces white blooms.

Mind you, these make a delicious salad in a vinaigrette dressing.  The flowers are blanched and mixed with sliced onions, tomatoes, a bit of ginger then dressed up with native vinegar and a little sugar.