::Thanks for replying.  I didn't mean to come across confrontational.  I just didn't know why the tag had been placed, and incorrectly assumed that a lack of immediate comment meant nobody was going to elaborate.  (I meant "a bit" literally, as "a short time".)  I agree that the lack of sources is problematic.  I've added a couple links, but any plants that can't be sourced should probably be removed from that list.  I think it's understood that Wikipedia doesn't give medical advice, but if there's a way to make the article sound less like a list of things the reader should try, that would be good.  I agree with the anthropological suggestion.