Does not exist!
Ok, to be fair a pepper does exist that is a called a purple bhut jolokia but in my opinion someone just named it a bhut jolokia so they could sell seeds.
1. It’s nowhere near as hot a bhut jolokia. Nowhere.
2. It doesn’t look a bhut jolokia, at all. Here’s a shot of some of my red bhut jolokias:
And here’s a shot of the “purple” bhut jolokia:
3. The pods do turn purple but ripen to red. Here’s a shot of a purple bhut plant that clearly shows red pods on the plant:
No offense to anyone growing this pepper, from what I hear it’s a decent tasting pepper and the plants produce well. I’m just not sold on the name…it’s not a bhut and dos not finish to purple so should not be called a purple bhut. I believe the earliest mentions of this pepper were in mid 2010 from a user at TheHotPepper names JSKaiser. He’s been banned from the site for awhile and if memory is correct didn’t do right by a lot of folks in the pepper growing community and in general has a terrible reputation.
So there you have it. People can call peppers whatever they want but this is one of the cases where the name is completely misleading. I for one will not grow this pepper nor will I acknowledge that a true purple bhut jolokia even exists!