Ephedra trifurca is a species of Ephedra known by the common names longleaf jointfir and Mexican tea. It is native to the states of Baja California, Chihuahua and Sonora in northwestern Mexico, and to California, Arizona, New Mexico, Texas in the Southwestern United States. It is found in desert scrub plant communities, in the Chihuahuan Desert, Sonoran Desert, and Colorado Desert.