er21b - Crystalline Mid-Elevation Forests and Shrublands
er21d - Foothills and Shrublands
er21d - Pine Ridge Escarpment
er25c - Moderate Relief Plains
er25c - Flat to Rolling Plains
er25f - Pine Bluffs and Hills
er25f - Sandy and Silty Tablelands
er25h - Platte River Valley and Terraces
er25h - Sagebrush Steppe
er43g - Semiarid Pierre Shale Plains
er43g - Central Grassland
er43p - Ponderosa Pine Forest-Savanna Hills
er43p - Mesic Dissected Plains
er43v - Pryor - Bighorn Foothills
er43v - Powder River Basin
er43x - Casper Arch
Based on Ecoregions developed by the EPA this map
describe areas of general similarity in ecosystems and in the type,
quality, and quantity of environmental resources, as well as similarity of
climate that can assist Wyoming gardenders.