If anyone would like Nigella hispanica seeds, they can treemail me with their address. Piksihk gets first dibs, if she first tells me where that usename came from
. Ground Nigella hispanica only faintly smells of cumin.
I have no idea how easily the species cross. Not knowing, if I were to grow N. sativa for spice harvest, I wouldn't grow any other Nigella species.