Join David Stevens, garden curator, for a vibrant stroll through Longenecker Horticultural Gardens, where he will highlight sensational seasonal colors and share the science behind this natural phenomenon. Free, no registration required. Meet at the Visitor Center. University of WI Arboretum 1207 Seminole Hwy. Madison, WI 53711 608/263-7888 or arboretum.wisc.edu