I like and use Mountain Rose Herbs a lot. I purchase products from them like essential oils, dried herbs and other items I use. I also subscribe to their blog. A post I found quite interesting is Understanding Taxonomy and Species Labeling in Natural Herbal Products.
The post describes, quite clearly, what the botanical nomenclature means on labels of herb products.
While you’re on the blog, I encourage you to subscribe and browse their offerings. (I am not affiliated in any way with Mountain Rose Herbs, nor do I receive any compensation from them.)
Enjoy