Yes, I got them from a person who has grown her own for years and saves seeds each year. They're about 10 years old from what I remember.
I guess it's possible that Z. violacea has hybridized with these? But I don't know how likely it is.
My gut instinct tells me that when both are grown in the same fields/gardens that it's more common than we might think. And most of the time, we wouldn't necessarily even know.
