Thanks everyone. In fact, I had a dream to grow this climber on our compound wall, but I did not find it at the time I wanted it, even after searching a few nurseries. This was about 5-6 years ago.
This photo now [of the climber in full bloom] was taken by me during my tour to Chandigarh, to a place called "Pinjore Gardens" which has a long history - see inscripition attached for info.
