On this weeks episode of We Dig Plants, host Alice Marcus Krieg welcomes guests Dr. Richard McCourt and Dr. Alfred E. (Ernie) Schuyler, both of Philadelphia, to discuss the plants and horticulture associated with the Lewis and Clark expedition. Dr. McCourt is the Associate Curator of Botany at Drexel Universitys Academy of Natural Sciences, Dr. Schuyler is its Curator Emeritus. [Thomas Jefferson] didnt like to use [tobacco], but Ernie says he grew it. He did live in Virginia, after all. [23:30] – Richard McCourt andnbsp;