PH-LC 27 has an original Lewis label (Lewis 53) indicating the collection was gathered above the Cheyenne River near the Sully-Potter Co. line in South Dakota on 3 Oct 1804 (Moulton, 1987a: 470). A second label, written by Pursh, proclaims the plant was gathered on 1 Oct 1804. It is not clear if the two labels on the sheet refer to each of the two fragments or if Pursh mistakenly dated his label 1 Oct instead of 3 Oct. It is our opinion that the two fragments represent a single, broken stem. On PH-LC 29, Pursh gives the date as 1 Oct; he also annotates it as Artemisia integrifolia L. (Sp. Pl.: 848. 1753), the name he (Pursh 1813: 520) eventually published. As noted under Artemisia campestris subsp. caudata (see No. 19 above), we have been unable to find either of the specimens Pursh attributes to Lewis and Clark under A. campestris or A. santonica. It is possible the original Lewis label went with one of these missing specimens. A comparison of PH-LC 27 with PH-LC 29 is not entirely helpful as the Lewis fragments on the two sheets are not all that similar. We can not ignore the notion that PH-LC 27 (Lewis 53) was collected a few days after PH-LC 29 and perhaps the Pursh label on PH-LC 27 was mistakenly attached. (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:10/03/1804