The sheet is a mixture of Atriplex canescens (right hand specimen) and A. gardneri (left and middle specimens). The earlier designation by Cutright (1969: 404) of the entire sheet as the type therefore is rejected. The type was collected along the Big Bend of the Missouri River in Lyman Co., South Dakota, on 21 Sep 1804 (Moulton, 1987a: 96-99). There is a small portion of an original Lewis label that gives only the date. It is assumed that the collection was mixed to begin with and not subsequently confused. Pursh reports that "Goats delight to feed upon this shrub" not realizing that "Goats" in this case refers to the pronghorn of the American West. (The Lewis & Clark Herbarium Digital Imagery Study Set, ANSP, 2002) On deposit at the Academy of Natural Sciences, Philadelphia Collected by:Meriwether Lewis & William Clark Collection date:09/21/1804