Cottowoods are native, large, deciduos trees with several species present in the Southwest. They grow in riparian zones. The different species have many similarities: a diamond leaf pattern, a flattened petiole (the stalk attaching the leaf to the tree) that allows the leaf to dance with the smallest breeze and rapid growth. Cottowoods have soft wood. In this Center we can see Freemont's cottonwood (Populus fremontii) and Narrow Leaf cottonwood (populus angustifolia) and others that are suspected to be hybrids.