Marfa by CatSpring Yaupon

Yaupon is the only caffeinated plant that grows natively in the US. This company is woman-owned too. I like their Marfa dark roast the best, because it has the most flavor. It tastes a bit like yerba maté, but with less smokiness and intensity. You can steep it multiple times too, as with any unflavored black, green, or oolong tea.