1 	Coast Range
2 	Puget Lowland
3 	Williamette Valley
4 	Cascades
5 	Sierra Nevada
6 	Southern and Central California Plains and Hills
7 	Central California Valley
8 	Southern California Valley
9 	Eastern Cascade Slopes and Foothills
10	Columbia Basin
11	Blue Mountains
12	Snake River Basin/High Desert
13	Northern Basin and Range
14	Southern Basin and Range
15	Northern Rockies
16	Montana Valley and Foothill Prairies
17	Middle Rockies
18	Wyoming Basin
19	Wastch and Unita Mountains
20	Colorado Plateaus
21	Southern Rockies
22	Arizona/New Mexico Plateau
23	Arizona/New Mexico Mountains
24	Southern Deserts
25	Western High Plains
26	Southwestern Tablelands
27	Central Great Plains
28	Flint Hills
29	Central Oklahoma-Texas Plains
30	Central Texas Plateau
31	Southern Texas Plains
32	Texas Blackland Prairies
33	East Central Texas Plains
34	Western Gulf Coastal Plain
35	South Central Plains
36	Ouachita Mountains
37	Arkansas Valley
38	Boston Mountains
39	Ozark Highlands
40	Central Irregular Plains
41	Northern Montana Glaciated Plains
42	Northwest Glaciated Plains
43	Northwest Great Plains
44	Nebraska Sand Hills
45	Northeastern Great Plains
46	Northern Glaciated Plains
47	Western Corn Belt Plains
48	Red River Valley
49	Northern Minnesota Wetlands
50	Northern Lakes and Forests
51	North Central Hardwood Forests
52	Driftless Area
53	Southeastern Wisconsin Till Plains
54	Central Corn Belt Plains
55	Eastern Corn Belt Plains
56	Southern Michigan/Northern Indiana Till Plains
57	Huron/Erie Lake Plain
58	Northeastern Highlands
59	Northeastern Coastal Zone
60	Northern Appalachian Plateau
61	Erie/Ontario Lake Plain
62	North Central Appalachians
63	Middle Atlantic Coastal Plain
64	Northern Piedmont
65	Southeastern Plains
66	Blue Ridge Mountains
67	Central Appalachian Ridges and Valleys
68	Southwestern Appalachians
69	Central Appalachians
70	Western Allegheny Plateau
71	Interior Plateau
72	Interior River Lowland
73	Mississippi Alluvail Plain
74	Mississippi Valley Loess Plains
75	Southern Coastal Plain
76	Southern Florida Coastal Plain
