1
16
Pacific_Northwest
2
15
Great_Basin
3
9
Northern_Plains
4
5
Great_Lakes
12
Northern_Rockies
6
Northeast
7
Prairie_Peninsula
8
Appalachians/Cumberland_Plateau
10
Central_Plains
Mid-Atlantic
11
17
Pacific_Southwest
14
Desert_Southwest
13
Southern_Rockies/Colorado_Plateau
Southern_Plains
Ozarks_Complex
Southeast
18
19
20
21
22
23
24
Atlantic_Neotropical
25