Meehan (1898: 15-16) discusses the significance of this sheet at some length. He correctly notes that Pursh's name replaces the long established but later Clematis douglasii Hook. (Fl. Boreali-Amer. 1: 1. 1829) and that Britton clearly misapplied the name when he proposed Pulsatilla hirsutissima (Nutt.) Britton (in Ann. New York Acad. Sci. 6: 217. 1891). This is essentially the only nomenclatural correction Meehan proposes. The lectotype was collected on 27 May 1806 near Kamiah in Idaho Co., Idaho, contrary to Pursh's "plains of the Columbia river." Neither Lewis nor Clark mentions the plant (Moulton, 1991: 290-297). (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:05/27/1806