Salix hookeriana Shrubland Alliance
Coastal dune willow thickets

USDA Ecological Section Map

Summary Information

  • Primary Life FormShrub
  • Elevation0-100 m
  • State RarityS3
  • Global RarityG4
  • DistributionCAN: BC. USA: CA, OR, WA (NatureServe)
  • Endemic to CaliforniaNo
  • Endemic to California Floristic Province and DesertsNo
  • Date Added1995/11/01

Characteristic Species

Salix hookeriana is dominant or co-dominant in the tall shrub or low tree canopy with Baccharis pilularis, Morella californica, Rubus spp., Salix lasiolepis and Salix sitchensis. As a shrubland, emergent trees may be present at low cover.Alnus rubra, Picea sitchensis, Salix lucida

Vegetation Layers

Shrubs < 8 m; canopy is continuous. Herbaceous layer is variable.

Membership Rules

  • Salix hookeriana > 50% relative cover (CVIS 2007).


Areas near the ocean where water stands and seasonally floods as in deflation plains and swales among stabilized dunes, lagoon margins, and floodplains. The USFWS Wetland Inventory (1996 national list) recognizes Salix hookeriana as a FACW plant.

Other Habitat, Alliance and Community Groupings

MCV (1995) Hooker willow series
NVCS (2009) Salix hookeriana seasonally flooded shrubland alliance
Calveg Willow, Willow-Alder
Holland North Coast riparian scrub
Munz Freshwater marsh
WHR Fresh emergent wetland
CDFW CA Code 61.203.00

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 Vancouverian coastal riparian scrub