Discussion on Campsis plants leads me to think that *:* *Campsis radicans 'Flava'* on FOI website posted by Aarti ji may not be Campsis at all. The shape of leaves and curved corolla tube much narrowed towards base suggests it may be belonging to some other genus possibly Tecomaria. Here is real Campsis radicans 'Flava' for comparison:
http://summerhillseeds.com/campsis-radicans-flava-yellow-blooms-p-735.html -- Dr. Gurcharan Singh Retired Associate Professor SGTB Khalsa College, University of Delhi, Delhi-110007 Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018. Phone: 011-25518297 Mob: 9810359089 http://people.du.ac.in/~singhg45/