Salix lemmonii Shrubland Alliance
Lemmon’s willow thickets

USDA Ecological Section Map

Summary Information

  • Primary Life FormShrub
  • Elevation1800-2700 m
  • State RarityS3
  • Global RarityG4
  • DistributionUSA: CA, ID, NV, OR, WY (NatureServe)
  • Endemic to CaliforniaNo
  • Endemic to California Floristic Province and DesertsNo
  • Date Added2009/09/01

Characteristic Species

Salix lemmonii is dominant in the shrub canopy with Alnus incana, Lonicera involucrata, Ribes inerme, Ribes montigenum, Ribes nevadense, Rosa woodsii, Salix eastwoodiae, Salix geyeriana and Salix lutea.

Vegetation Layers

Shrubs < 5 m; canopy is open to continuous. Herbaceous layer is open to continuous with a diversity of upper-elevation meadow species.

Membership Rules

  • Salix lemmonii > 5% absolute cover and > 50% relative cover in the shrub canopy (Potter 2005).


Stream banks, lake shores, seeps, and mesic meadows. Soils are alluvium, derived from granitic parent material. The USFWS Wetland Inventory (1996 national list) recognizes Salix lemmonii as an OBL plant.

Other Habitat, Alliance and Community Groupings

MCV (1995) Montane wetland shrub habitat
NVCS (2009) Salix lemmonii seasonally flooded shrubland alliance
Calveg Willow (riparian scrub)
Holland Montane riparian scrub, Modoc-Great Basin riparian scrub
Munz Not treated
WHR Montane riparian
CDFW CA Code 61.113.00

National Vegetation Classification Hierarchy

Formation Class Mesomorphic Tree Vegetation (Forest and Woodland)
Formation Subclass Temperate Forest
Formation Temperate Flooded and Swamp Forest
Division Western North America Flooded and Swamp Forest
Macro Group Western Cordilleran montane-boreal riparian scrub
Group Western North American montane-subalpine riparian scrub