You're spot on with "herb" though, at least to my knowledge.
Just to add to more to this, I'm more conscious of my grammar(or I try to be) and barely have a southern accent compared to the typical "Mississippite," but when I go to a larger city, people can always tell where I'm from. Once, in New York, a store clerk said I was the most southern person she had ever heard in her life. In Mississippi, people ask me where I'm from originally!