| California Mixed Conifer Group |
| Douglas-fir Group |
| Exotic Softwoods Group |
| Fir/Spruce/Mountain Hemlock Grou |
| Hemlock/Sitka Spruce Group |
| Loblolly/Shortleaf Pine Group |
| Lodgepole Pine Group |
| Longleaf/Slash Pine Group |
| Other Western Softwoods Group |
| Pinyon/Juniper Group |
| Ponderosa Pine Group |
| Redwood Group |
| Spruce/Fir Group |
| Western Larch Group |
| Western White Pine Group |
| White/Red/Jack Pine Group |