Tetracoccus Engelm. ex Parry Tetracoccus Engelm. ex Parry, W. Amer. Sci. 1(3): 13. 1885 sec. Dressler 1954=Halliophytum I.M.Johnst., Contr. Gray Herb. 68: 88. 1923 syn. sec. Dressler 1954