100 Polar Domain
120 Tundra Division
124 Arctic Tundra Province
125 Bering Tundra (Norther) Province
126 Bering Tundra (Southern) Province
M120 Tundra Regime Mountains
M121 Brooks Range Tundra - Polar Desert Province
M125 Sewared Peninsula Tundra - Meadow Province
M126 Bering Ahklun Mountains Tundra - Meadow Province
M127 Aleutian Oceanic Meadow - Health Province
M130 Subarctic Division
M131 Yukon Intermontane Plateaus Tayga Province
M135 Coastal Trough Humid Tayga - Tundra
M139 Upper Yukon Tayga Province
M130 Subarctic Regime Mountains
M131 Yukon Intermontane Plateaus Tayga
-Meadow Province
M135 Alaska Range Humid Tayga- Tundra
- Meadow Province
M139 Upper Yukon Tayga - Meadow Province
200 Humid Temperate Domain
210 Warm Continental Division
212 Laurentian Mixed Power Forest Province
M210 Warm Continental Regime Mountains
M212 Adirondack - New England Mixed Forest -
Coniferous Forest - Alpine Meadow Province
220 Hot Continental Division
221 Eastern Broadleaf Forest (Oceanic) Province
222 Eastern Broadleaf Forest (Continental) Province
M220 Hot Continental Regime Mountains
M221 Central Appalachian Broadleaf Forest-
Coniferous Forest - Meadow Province
M222 Ozark Broadleaf Forest - Meadow Province
230 Subtropical Division
231 Southeastern Mixed Forest Province
232 Outer Coastal Plain Mixed Forest Province
234 Lower Mississippi Riverine Forest Province
M230 Subtropical Regime Mountains
M231 Oachita Mixed Forest - Meadow Province
240 Marine Division
242 Pacific Lowland Mixed Forest Province
M240 Marine Regime Mountains
M242 Cascade Mixed Forest - Coniferous
M244 Pacific Coastal Mountains Forest - Meadow Province
M245 Pacific Gulf Coastal Forest - Meadow Province
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250 Prairie Division
251 Prairie Parkland (Temperate) Province
255 Prairie Parkland (Subtropical) Province
260 Mediterranean Regime Mountains
261 California Coastal Chaparral Forest and Shrub Province
262 California Dry Steppe Province
263 California Coastal Steppe, Mixed Forest, and Redwood Forest Province
M260 Mediterranean Regime Mountains
M261 Sierran Steppe - Mixed Forest - Coniferous Forest
-Alpine Meadow Province
M262 California Coastal Range Open Woodland - Shrub - Coniferous Forest - Meadow Province
300 Dry Domain
310 Tropical/Subtropical Steppe Division
311 Great Plains Steppe and Shrub Province
313 Colorado Plateau Semi-Desert Province
315 Southwest Plateau and Plains Dry Steppe and Shrub Province
M310 Tropical/Subtropical Steppe Regime Mountains
M313 Arizona-New Mexico Mountains Semi-Desert
-Open Woodland - Coniferous Forest
-Alpine Meadow Province
320 Tropical/Subtropical Desert Division
321 Chihuahuan Semi-Desert Province
322 American Semi-Desert and Desert Province
M330 Temperate Steppe Division
331 Great Plains-Palouse Dry Steppe Province
332 Great Plains Steppe Province
M330 Temperate Steppe Division
M331 Southern Rocky Mountains Steppe - Open Woodland - Coniferous Forest - Alpine Meadow Province
M332 Middle Rocky Mountains Steppe - Coniferous Forest - Alpline Meadow Province
M333 Northern Rocky Mountains Forest - Steppe - Coniferous - Forest - Alpine Meadow Province
M334 Black Hills Coniferous Forest Province
340 Temperate Desert Division
341 Intermountain Semi-Desert and Desert Province
342 Intermountain Semi-Desert Province
M340 Temperate Desert Regime Mountains
M341 Nevada - Utah Mountains Semi-Desert - Coniferous Forest - Alpine Meadow Province
400 Humid Tropical Domain
410 Savanna Division
M410 Savanna Regime Mountains
M411 Puerto Rico Province
M420 Rainforest Regime Mountains
M423 Hawaiian Islands Province
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