Effects of aspect on vegetation can be clearly seen in this photo from Southwest Idaho near Anderson Ranch Reservoir. The north facing slopes receive more snow often because of prevailing winds and are shaded from direct sunlight during the winter, consequently they have more water available to support trees and forests, while the south facing slopes which receive more insolation is much hotter and dryer and supports only smaller more desert adapted woody plant species. North facing slopes here are dominated by a Pinus ponderosa, Pseudotsuga menziesii forest while the south facing slopes are mainly dominated by desert shrubs Artemisia tridentata and Purshia tridentata.