Botanical Name: Flower of Mesua ferrea
Local Name: Nagesar in Bengali, Naga Kesar in Hindi

by A. J. T. Johnsingh, licensed under CC BY-SA 3.0
Uses
The oily seeds are edible when well cooked, and both the seeds and the flowers are used locally in traditional medicine.
The stamens, the male reproductive part a flower are used to treat stomach disorders, asthma, cough, fever, dysentery, bleeding piles and leprosy. Cobra’s Saffron or Naga Kesar produced from the stamens is a very popular drug in our traditional medicinal system. The volatile oil from the flowers has antibacterial properties and it is useful in curing indigestion and cough.
Bibliography
https://www.britannica.com/plant/Ceylon-ironwood
https://www.newindianexpress.com/lifestyle/health/2018/apr/18/aphrodisiac-stamens-that-help-treat-leprosy-1802856.html
http://bsienvis.nic.in/State_flower/Tripura%20State%20Flower%20-%20Final%20-%2010.12.2013.pdf