Yerba maté is a tall, dioecious evergreen member of the holly family that is native to South America. The leaves of the plant are used to make a highly-caffeinated beverage known as yerba maté tea, which is extremely popular throughout South America. In fact, more than 90% of Argentinian adults consistently consume it as their morning brew. Maté cafes and maté bars are as prevalent in South America as coffee houses are in North America and Europe.