HS, many thanks for having no doubt about my plant being
Caesalpinia ferrea C.Mart.
The Trees of Delhi as well as Flowers of India show and describe very well about
C. ferrea, and my plant from VJBU must be it.
There is hardly any site on internet giving description (or pictures) of
Peltophotum linnaei Benth. (syn. of
Caesalpinia violacea (Mill.) Standl.)
... except one at
http://chalk.richmond.edu/flora-kaxil-kiuic/c/caesalpinia_violacea.html
The additional pictures of leaves are a good help in distinguishing difference between
P. linnaei and
C. ferrea.
Many thanks once again for this help with the ID.
Regards.
Dinesh