Details: This poster shows a panaoramic view of a group of mountains. Throughout the picture, the trees have their autumn foliage, and are brilliant shades of yellow, orange, and red. At the bottom it says Nature's Colors, Impressions of America .
Autumn leaf color is a phenomenon that affects the normally green leaves of many deciduous trees and shrubs by which they take on, during a few weeks in the autumn months, one or many colors that range from red to yellow. The phenomenon is commonly called fall colors and autumn colors, while the expression fall foliage usually connotes the viewing of a tree or forest whose leaves have undergone the change.