At Thomas Jefferson's Monticello near Charlottesville, VA one of the great treats is seeing many of the exact species and varieties of plants that Jefferson grew. Monticello's Thomas Jefferson Center for Historic Plants locates, cultivates, and shares these often rare specimens.
Peggy Cornett, the Center's director, talks about this often overlooked but critical aspect of Monticello's mission in Preserving America's Historic Plants, a Monticello podcast. (January 25, 2006; approx. 12 min.). Scroll to midway in the index to access.