| Species or Species Combination | Species that May Be Included in Combination | Grading Rules Agencies |
|---|---|---|
| Alaska Cedar | WCLIB | |
| Alaska Hemlock | WWPA | |
| Alaska Spruce | Alaska Sitka Spruce Alaska White Spruce |
WWPA |
| Alaska Yellow Cedar | WCLIB, WWPA | |
| Aspen | Big Tooth Aspen Quaking Aspen |
NELMA, NSLB, WWPA |
| Baldcypress | SPIB | |
| Balsam Fir | NELMA, NSLB | |
| Beech-Birch -Hickory | American Beech Bitternut Hickory Mockernut Hickory Nutmeg Hickory Pecan Hickory Pignut Hickory Shagbark Hickory Sheelbark Hickory Sweet Birch Water Hickory Yellow Birch |
NELMA |
| Coast Sitka Spruce | NLGA | |
| Coast Species | Amabalis Fir Coast Sitka Spruce Douglas Fir Western Henlock Western Larch |
NLGA |
| Cottonwood | NSLB | |
| Douglas Fir-Larch | Douglas Fir Western Larch |
WCLIB, WWPA |
| Douglas Fir-Larch (North) | Douglas Fir Western Larch |
NLGA |
| Douglas Fir-South | WWPA | |
| Eastern Hemlock | NELMA, NSLB | |
| Eastern Hemlock-Balsam Fir | Balsam Fir Eastern Hemlock Tamarack |
NELMA |
| Eastern Hemlock-Tamarack | Eastern Hemlock Tamarack |
NELMA, NSLB |
| Eastern Hemlock-Tamarack (North) | Eastern Hemlock Tamarack |
NLGA |
| Eastern Softwood | Balsam Fir Black Spruce Eastern Hemlock Eastern White Pine Jack Pine Norway(Red)Pine Pitch Pine Red Spruce Tamarack White Spruce |
NELMA, NSLB |
| Eastern Spruce | Black Spruce Red Spruce White Spruce |
NELMA, NSLB |
| Eastern White Pine | NELMA, NSLB | |
| Eastern White Pine(North) | NLGA | |
| Hem-Fir | California Red Fir Grand Fir Noble Fir Pacific Silver Fir Western Hemlock White Fir |
WCLIB, WWPA |
| Hem-Fir(North) | Amabalis Fir Western Hemlock |
NLGA |
| Mixed Maple | Black Maple Red Maple Silver Maple Sugar Maple |
NELMA |
| Mixed Oak | All Oak Species graded under NELMA rules | NELMA |
| Mixed Southern Pine | Any species in the southern pine species combination, plus either or both of the following: Pond Pine Virginia Pine |
SPIB |
| Mountain Hemlock | WWPA, WCLIB | |
| Northern Pine | Jack Pine Norway(Red)Pine Pitch Pine |
NELMA, NSLB |
| Northern Red Oak | Black Oak Northern Red Oak Pin Oak Scarlet Oak |
NELMA |
| Northern Species | Any Species graded under NLGA rules except Red Alser White Birch Norway Spruce |
NLGA |
| Northern White Cedar | NELMA | |
| Ponderosa Pine | NLGA | |
| Red Maple | NELMA | |
| Red Oak | Black Oak Cherrybark Oak Laurel Oak Northern Red Oak Pin Oak Scralet Oak Southern Red Oak Water Oak Willow Oak |
NELMA |
| Red Pine | NLGA | |
| Redwood | WWPA/RIS | |
| Sitka Spruce | WWPA, WCLIB | |
| Southern Pine | Loblolly Pine Longleaf Pine Shortleaf Pine Slash Pine |
SPIB |
| Spruce-Pine-Fir | Alpine Fir Balsam Fir Black Spruce Engleman Spruce Jack Pine Lodgepole Pine Red Spruce White Spruce |
NLGA |
| Spruce-Pine-Fir(South) | Balsam Fir Black Spruce Engleman Spruce Jack Pine Lodgepole Pine Norway(Red) Pine Red Spruce Sitka Spruce White Spruce |
NELMA,NSLB,WCLIB,WWPA |
| Western Cedars | Alaska Cedar Incense Cedar Port Orford Cedar Western Red Cedar |
WCLIB, WWPA |
| Western Hemlock | WWPA, WCLIB | |
| Western Hemlock(North) | NLGA | |
| Western White Pine | NLGA | |
| Western Woods | Any species in the Douglas Fir-Larch, DouglasFir(South), Hem-Fir,and Spruce-Pine-Fir(South)species combinations, plus any or all of the following: Alpine Fir Idaho White Pine Mountain Hemlock Ponderosa Pine Sugar Pine |
WCLIB, WWPA |
| White Oak | Bur Oak Chestnut Oak Live Oak Overcup Oak Post Oak Swamp Chestnut Oak Swamp White Oak White Oak |
NELMA |
| Yellow Poplar | NSLB |