Stock photography, photos: Spring Leaves Eastern Cottonwood Tr Stock photos of Eastern Cottonwood (Populus deltoides) tree with early spring leaves at sunrise. Sheyenne National Grassland, North Dakota. Photograph: © Matthew Thalman Click for a larger image and more information Keywords associated with this stock photo: daybreak, sun up, sunrise, sunrises, Cottonwood, deciduous, Eastern Cottonwood, Populus deltoides, Salicaceae, tree, trees, Willow, plantlife, plants, silhouette, ecology, ecosystem, environment, environmentalism, grassland, habitat, landscape, nature, prairie, scenery, scenic, America, National Grassland, North America, North Dakota, Sheyenne National Grassland, United States, United States of America, USA