Tea comes from the Camellia Sinensis plant and then, there's everything else. There are 390,900,000 different plant species on the planet and when we subtract all of the ones that are poisonous we come up with wonderful medicinal herbs that we can drink. Here's a link to some that you can enjoy from Tea Market:
Relaxation Sampler: https://www.teamarket.com/product-page/relaxation-sampler
Calming & Relaxing Teas: https://www.teamarket.com/calming-and-relaxing-teas