Atriplex acanthocarpa subsp. stewartii (I.M. Johnst.) Henrickson Atriplex acanthocarpa subsp. stewartii (I.M. Johnst.) Henrickson in S. W. Naturalist 33: 457. 1988 sec. POWO 2019=Atriplex stewartii I.M. Johnst. in J. Arnold Arbor. 22: 110. 1941 syn. sec. POWO 2019