The amazing flowers of the Musical Notes do look like musical notes. It is a variety of Clerodendrum.
The Ocna kirkii has flowers of yellow as well as red in the same plant. The flower is yellow when it is fresh, and turns red after it has been pollinated.
This climbing Bauhinia was full of orange flowers.
The Purple Glory Bush Tabouchina belongs to the Melastoma family.
My thanks to the team of Today's Flowers.