Pursh (1813: 283) makes no direct mention of Lewis and Clark material under the basionym, Arbutus uva-ursi L. (Sp. Pl.: 395. 1753). However, his comment that on "the plains of the Mississippi the Indians smoke the leaves under the name Sacacommis, and consider this of great medicinal virtue" is a garbled form of what is found on the label of Lewis 33. Lewis writes, "the natives smoke its leaves and mixed with tobacco / Called by the French Engages Sacacommis." According to the original label data, the plant was collected at Fort Mandan, McLean Co., North Dakota (Moulton, 1987a), where the expedition spent the winter. The plant was gathered in fruit so it most likely was taken in the late fall of 1804. (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