I have basil and mint growing in my herb garden. But the attached photo is something else growing there. I think it might be something I attempted to grow last year from seed but is only coming up now. I just don't know what it is. Does anyone recognize this plant? When it flowers, the blooms are lavender -- not white, like my current basil. I thought maybe purple basil, but purple basil has purple leaves. The edges of the leaves are jagged unlike my other basil.