Randal Clark is a Columbia, Mo. park volunteer. Clark leads the Rock Bridge Wildflower Walks and has been doing so for 34 years now. During these walks, Clark identifies and provides information about various types of wildflowers. People of all ages come to enjoy nature and learn about the native wildflowers of Missouri including the Shooting Star flowers, the wild Columbine, and, one of Clark's favorite, the Bastard Toadflax.