Not only nightshade, tomato, tobacco, but also aubergine (eggplant), capsicum (peppers), mandrake and the attractive flowering climbing garden plant Solanum....
There's not a lot you don't know about potatoes, Osiol. I love them. I'd pretty much live on them if I were a vegetarian, but then again, I'll stop eating animals when they stop making them out of meat!
In fact I heard it was possible to survive on a diet of solely potatoes and milk