Botany of Nations at The Academy of Natural Sciences

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In 1803, President Thomas Jefferson tasked Meriwether Lewis and William Clark with exploring the nation’s western territories after the Louisiana Purchase

In 1803, President Thomas Jefferson tasked Meriwether Lewis and William Clark with exploring the nation’s western territories after the Louisiana Purchase. But did you know that Philadelphia’s Academy of Natural Sciences is home to nearly all the explorers’ original journals and preserved specimens related to their botanical research in its Lewis & Clark Herbarium? For 2026, the institution highlights that collection in the new Botany of Nations exhibit, tracing the team’s journey through the stories and science of the plant knowledge with which they returned, imparted on them by the continent’s Indigenous nations.

Getting there