This specimen was found with the Lewis and Clark specimens from the American Philosophical Society and bears a label in Pursh's hand. It has broad leaves and is in flower. Pursh gives two locations for the species: "In the valleys of the Rocky-mountains and on the banks of the Missouri." This lectotype was collected on 9 Jul 1806 in the "Valleys of the Rocky mountains" according to the label, but it is not known whether Lewis or Clark gathered the specimen. On that date Lewis was traveling along the Sun River passing from Lewis and Clark Co., Montana, into Cascade Co. It rained the entire day, not the most suitable weather for collecting Linum lewisii in good anthesis. The men killed a buffalo and they camped near the mouth of Simms Creek in the early afternoon (Moulton, 1993: 98). Clark was at "Fortunate Camp" in Beaverhead Co., Montana (Moulton, 1993: 173-174). There was no rain and the party was hunting lost horses and making repairs to canoes. It seems likely that Clark had a better opportunity to gather the plant named for Lewis than did its namesake. At the time, Lewis was on the plains while Clark was definitely in the valleys of the Rocky Mountains. (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:07/09/1806