The Scotch Bonnet is a type of chilli pepper. It is of the same family as the habanero and one of the hottest peppers in the world.
Chillies are measured, or rated rather, in Scoville Units. Most Scotch Bonnets have a heat rating of 150000–325000 units which doesn’t mean a whole lot. But if I tell you that the jalepeno has a heat rating of 2500 to 8000, I think you get the picture. This stuff is hot! =)