Peggy Cornett at Thomas Jefferson's Monticello tells us that
In 1811 Thomas Jefferson recorded the planting of “Lathyrus odoratus. Sweet scented pea" in an oval flower bed at Monticello. Painted Lady Sweet Pea is a highly scented, pink and white bicolor variety, which was in cultivation by the 1730s and popular in American gardens through the 19C.
