Pursh (1813: 72) misapplies Linnaeus' Stipa juncea to the above specimen that ultimately proved to be a new species. Meehan lists this as S. spartea Trin. (in Mém. Acad. Imp. Sci. St.-Pétersbourg, Sér. 6, Sci. Math. 1: 82. 1831), the name suggested by Robinson and Greenman, but he notes that the plant was probably S. comata Trin. & Rupr. (in Mém. Acad. Imp. Sci. Saint-Pétersbourg, Sér. 6, Sci. Math., Seconde Pt. Sci. Nat., 5(1): 75. 1842). Moulton (in press) uses this latter name. The specimen was collected on 8 Jul 1806. It is not known who gathered the material. On this date Lewis was in Lewis and Clark Co., Montana, east of Lewis and Clark Pass, traveling from the Dearborn River to the Sun River. He camped on an island near the Cascade Co. line (Moulton, 1993: 96-98). During the course of the day, he passed through the plains where the grass is fairly common. Clark was in Beaverhead Co., Montana, and still in the mountains. During the course of the day his party moved to "Fortunate Camp" on the banks of the Beaverhead River where the grass also occurs (Moulton, 1993: 171-173). If Clark collected Linum lewisii, as suggested here, it is possible that he gathered this plant as well since both collections have similar label data. (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:07/08/1806