E. californica may refer to: Encelia californica, the California brittlebush, a flowering plant species native to southern California and Baja California Ephedra californica, the California jointfir, California ephedra, desert tea or cañatillo, a plant species native to southern California, Arizona and Baja California Eschscholzia californica, the California poppy, a plant species native to the western United States and in Mexico
See also List of Latin and Greek words commonly used in systematic names#C