Northern Prairie Wildlife Research Center
The Wilkes Expedition (also referred to as the U.S. Exploring Expedition) explored the Pacific northwest primarily in the year 1841 and mostly in the states of Washington and Oregon. This expedition did not reach Montana. Its furthest eastward extension was near the present site of Spokane, Washington and Lewiston, Idaho. William Dunlop Brackenridge was the botanist with this expedition. The expedition resulted in a tremendous number of publications; just the bibliography of papers resulting from the expedition is 186 pages. Due to the extensive nature of the expedition and the fact that it did not approach Montana, none of the original papers are cited here. Instead we recommend reading McKelvey's account of the expedition. He lists the major publications resulting from the Pacific northwest portion of the expedition.
McKelvey, S.D. 1955. Botanical explorations of the trans-Mississippi west, 1790-1850. Arnold Arboretum of Harvard Univ., Jamaica Plain, MA.