Origin: in Eustis, Fla., by Walter T. Swingle, U.S. Dept. of Agriculture. Introd. in 1931. Genoa lemon x Mexican lime; selected in 1909. Tree: evergreen, vigorous, productive, resembling lime; leaf unifoliate, 3-5 inches long, oval, pointed, petiole wingless; hardier than lime; resistant to scab and withertip, but highly susceptible to gummosis caused by Diplodia natalensis. Variety gone out of commercial use. Fruit: size and shape of ordinary lemon; rind pale yellow, thin, tough, somewhat corrugated or wrinkled; 10-12 segments; pulp translucent, greenish-yellow, lime type, high acid with flavor of lemon; usually four to six up to 12 seeds, slender, long, pointed.