Account of the botanical discoveries of Meriwether Lewis and William Clark, together with illustrations of plant specimens from the Lewis and Clark Herbarium.

The Academy of Natural Sciences of Philadelphia is home to more than 200 priceless specimens of plants collected by Meriwether Lewis and William Clark on their historic journey from 1803-1806 through what would become the western part of the United States. The dried and pressed plants housed in the Academy are virtually all that remains of the physical specimens brought back by the two explorers. These plants are historic treasures from an age in exploration and national growth that dramatically changed the United States. But they are more than museum pieces--the specimens are also scientific treasures to modern researchers studying the flora of North America. History of the Lewis & Clark Expedition The Plants in the Collection The Importance of the Collection.