Tundra

Broken down into two major formations:

Arctic tundra

Alpine Tundra

Coniferous Forest

Broken down into three major formations:

Boreal Coniferous Forests

Montane Coniferous Forests

Northwest Costal Coniferous Forest

Deciduous Forest

Grassland Biome

Broken down into 4 major formations:

Great Plains Grassland

Palouse Prairie

Central Valley California Prairie

Desert Grassland

Desert Biome

Broken down into 2 major formations:

Cold Desert

Great Basin Desert

Hot Desert

Mojave

Sonoran

Chihuahun

North American Temperate Woodland/ShrublandSavanna/

Tropics

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