White/Red/Jack Pine Group
Spruce/Fir Group
Longleaf/Slash Pine Group
Loblolly/Shortleaf Pine Group
Pinyon/Juniper Group
Douglas-fir Group
Ponderosa Pine Group
Western White Pine Group
Fir/Spruce/Mountain Hemlock Grou
Lodgepole Pine Group
Hemlock/Sitka Spruce Group
Western Larch Group
Redwood Group
Other Western Softwoods Group
California Mixed Conifer Group
Exotic Softwoods Group
Oak/Pine Group
Oak/Hickory Group
Oak/Gum/Cypress Group
Elm/Ash/Cottonwood Group
Maple/Beech/Birch Group
Aspen/Birch Group
Alder/Maple Group
Western Oak Group
Tanoak/Laurel Group
Other Western Hardwoods Group
Tropical Hardwoods Group
Exotic Hardwoods Group