Northern Mixed Grasslands Northern Mixed Grasslands Northern Mixed Grasslands Nebraska Sand Hills Mixed Grasslands Gulf of California xeric scrub Gulf of California xeric scrub Gulf of California xeric scrub Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin montane forests Great Basin shrub steppe California Central Valley grasslands Klamath-Siskiyou forests Wasatch and Uinta montaine forests Wasatch and Uinta montaine forests Wasatch and Uinta montaine forests Wasatch and Uinta montaine forests Wyoming Basin shrub steppe Wyoming Basin shrub steppe Western Great Lakes Forests Alberta/British Columbia foothills forest Alberta/British Columbia foothills forest Alberta Mountain forests Palouse grasslands Palouse grasslands Palouse grasslands Palouse grasslands Palouse grasslands Eastern Cascades forest Eastern Cascades forest British Columbia mainland coastal forests British Columbia mainland coastal forests Willamette Valley forests Puget lowland forests Puget lowland forests Puget lowland forests Puget lowland forests Puget lowland forests Puget lowland forests Montana Valley and Foothill grasslands Montana Valley and Foothill grasslands Montana Valley and Foothill grasslands South Central Rockies forests South Central Rockies forests South Central Rockies forests South Central Rockies forests South Central Rockies forests South Central Rockies forests Central and Southern Cascades forests Alberta Mountain forests Upper Midwest forest-savanna transition