The bhut jolokia also known as bih jolokia, u-morok, ghost pepper, ghost chili pepper, red naga chili, Naga Jolokia, and ghost chili is India’s Hottest Chilli. It is cultivated in Bangladesh and Indian states of Assam, Nagaland and Manipur.

In 2007, Guinness World Records certified that the ghost pepper was the world’s hottest chili pepper. However, the bhut jolokia was superseded by the Trinidad moruga scorpion in 2012, which was in turn replaced by the “Carolina Reaper” on December 26, 2013.

source: http://en.wikipedia.org/wiki/Bhut_jolokia