Yaupon holly is a familiar garden plant. Its leaves are also used to brew tea. /tamu - stock.adobe.com Share Long before Earl Grey, Darjeeling and oolong reached our shores, there was yaupon.

Long before Earl Grey, Darjeeling and oolong reached our shores, there was yaupon. Tea brewed from the leaves of the yaupon holly has been ... continent's only native plant containing caffeine ...