The Yellow Bhut Jolokia was found in a couple of people's grow outs of Red Bhut Jolokia that came from NMSU chile Pepper Institute, grown by Dr. Paul Bosland. It is a natural variant of the Red Bhut Jolokia. The shape, size and characteristics of the Red Bhut Jolokia are still there just that it is yellow in colour. However one thing that is not the same is the heat. Tested at USA labs, tey come in between 250,000 - 400,000 Scoville Heat Units. The yellow versions of chillies in my opinion have a better flavour to them with my two favourite being the Yellow 7 Pod and Fatalii.