Revel in fall color under the guidance of Rebecca Arnoldi, artist and naturalist, an instructor who combines an artist’s eye with botanical knowledge. Combine careful observation with fluid watercolor painting to express the essence, energy and emotion stirred by the natural world. All levels are welcome. The class meets at the Arnold Arboretum. Fee $50, offered in collaboration with the Eliot School of Fine & Applied Arts. To register, log on to www.arboretum.harvard.edu.