| Okanagan shrub steppe(expression, desert, ecoregion, shrubland) |
| Okanogan dry forest(expression, forest, temperate, coniferous, ecoregion) |
| Ozark Mountain forest(expression, forest, broadleaf, mixed, temperate) |
| Pacific Coastal Mountain icefields and tundra(expression, ecoregion, zone, tundra) |
| Palouse grasslands(expression, grassland, temperate, savanna, shrubland) |
| Piney Woods forest(expression, forest, temperate, coniferous, ecoregion) |
| Puget lowland forest(expression, forest, temperate, coniferous, ecoregion) |
| Sierra Madre Occidental pine-oak forest(expression, forest, coniferous, ecoregion, tropical) |
| Sierra Madre Oriental pine-oak forest(expression, forest, coniferous, ecoregion, tropical) |
| Sierra Nevada forest(expression, forest, temperate, coniferous, ecoregion) |
| Snake-Columbia shrub steppe(expression, desert, ecoregion, shrubland) |
| Sonoran-Sinaloan transition subtropical dry forest(expression, forest, broadleaf, dry, tropical) |
| South Avalon-Burin oceanic barrens(expression, forest, ecoregion, boreal, taiga) |
| South Central Rockies forest(expression, forest, temperate, coniferous, ecoregion) |
| Southeastern conifer forest(expression, forest, temperate, coniferous, ecoregion) |
| Southeastern mixed forest(expression, forest, broadleaf, mixed, temperate) |
| Southeastern subtropical evergreen forest(expression, forest, broadleaf, mixed, temperate) |
| Southern Great Lakes forest(expression, forest, broadleaf, mixed, temperate) |
| Southern Hudson Bay taiga(expression, forest, ecoregion, boreal, taiga) |
| Tamaulipan matorral(expression, desert, ecoregion, shrubland) |