| Location: | United States (Wyoming, Colorado, Oregon, California, South Dakota, Alaska, Nevada, Utah, New Mexico, Idaho, Washington, Montana); Canada (British Columbia, Alberta) |
| Description: | These are montane to subalpine riparian shrublands ranging from short to tall (0.5-15 m) that occur in steep and narrow to wide, low-gradient valley bottoms and floodplains as well as steep moist avalanche chutes. They are generally dominated by any or a mix of the following: Alnus incana, Alnus oblongifolia, Alnus viridis, Betula occidentalis, Betula glandulosa, Betula occidentalis, Cornus sericea, Salix bebbiana, Salix boothii, Salix brachycarpa, Salix drummondiana, Salix eriocephala, Salix geyeriana, Salix monticola, Salix planifolia, and/or Salix wolfii. |