This sheet supposedly consists of two collections, one made on 7 May 1806 and another on 27 Jun 1806. The first was found along the Clearwater River (Moulton, 1991: 220-225) and the second along the Lolo Trail at or near Lolo Creek (Moulton, 1993: 55-59). Meehan (1898: 25) considers the two sterile branchlets to be an unknown species of Prunus whereas Piper annotates the sheet with "I think this is Amelanchier sp." We are following Moulton (in press) in referring to the sheet under the latter scientific name although we have no firm opinion as to the correct identification of the two sterile branchlets. If indeed these are fragments of Amelanchier, they probably represent A. alnifolia var. alnifolia. Several species of Prunus occur in both areas. (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:05/07/1806