Meehan (1898: 33) lists this as Cnicus edulis (Nutt.) A. Gray (in Proc. Amer. Acad. Arts 10: 47. 1874). The specimen was gathered at Fort Clatsop, Clatsop Co., Oregon, on 13 Mar 1806. Only a leaf was preserved. The root of the plant, known as "shanatanque" to the natives (Coues, 1898: 306), was described by Lewis and by Clark on 21 Jan 1806 who give the Native American name as "shan-ne-tâh-que" (Lewis) and "Chan-ne-tâk-que" (Clark; see Moulton, 1990: 226-227). Neither explorer mentions the plant on 13 Mar (Moulton, 1990: 409-414), but we suspect the date is correct as first leaf formation of the season would be occurring about this time. (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:03/13/1806