Which grape is "evil in the mouth"?

An ugly duckling grape variety that became a swan in a mountain desert

Well hello. And I mean that very literally to all our new readers over the last two weeks. It’s fabulous to have you here. So just to fill you in on what goes on. On Wednesdays there’s a wine marketing post - these build into a sort of course I wrote it with wine marketers and students in mind. But lots of people said they enjoyed the insights. Then Fri…