Dear Dinesh Ji,
This not Saussurea costus, it seemms to me Saussurea hypoleuca.
--
Umeshkumar Tiwari, Research Associate
Foundation for Revitalisation of Local Health Traditions (FRLHT)
Institute of Ayurveda and Integrative Medicine
No.74/2, Jarakbande Kaval
Post: Attur, Via Yelahanka
Bangalore - 560 064