Good idea, Kyla. I won't buy any seeds that don't have the botanical name on the packet, either. That's how you really know what you're getting.
Btw. here's the link to your Texas Tarragon in our database. Lots of pictures, and nice comments on this one.
Mexican Mint Marigold (Tagetes lucida)
Looks like you'll be able to tell the difference pretty easily. The Texas Tarragon has much bigger, greener leaves than French Tarragon. Plus the nice yellow flowers, eventually of course.