! H. N. Moldenke and cited by him in his Monograph of the Genus, June 1963
A. Cronquist
8570
1959-06-29 - 1959-01-18
29 Jun 1959
United States of America, Oregon, Harney Co., Shore of Ten Cent lake, at the east base of the north end of the Steens Mountains. Below the high water mark, but well above the present water level