Kyla, I was equally confused trying to correctly ID both French and Russian tarragon (I have both) and was told that their accepted name is the same for both even though they have obvious (to me) differences. Artemisia dracunculus. One is much coarser than the other but apparently they share DNA. I bought them both as seedlings so can't speak to the viability of their seed, and neither had a cultivar on the label, so I have no clue if one might be 'Sativa' while the other may be something else or just a species. Both are marginally hardy for me and I often have to replace them in the spring. Zuzu helped me sort it out, you may want to check with her.
I also have Tagetes lucida which is definitely a different plant than A. dracunculus. I call that one Mexican tarragon and as its name implies, it has a slight psychotropic property. It has a really nice anise scent and looks like a tall bushy marigold. It is either marginally hardy or self-sows for me - one year I think it over-wintered and the next it appeared to self-sow (came up in the same general area but not the exact same location).
