Salix lucida ssp. lasiandra Forest & Woodland Alliance
Shining willow groves

USDA Ecological Section Map

Summary Information

  • Primary Life FormTree
  • Elevation0-2700 m
  • State RarityS3.2
  • Global RarityG4
  • DistributionCAN. USA: CA, CO, ID, MT, NV, OR, WA, WY (NatureServe)
  • Endemic to CaliforniaNo
  • Endemic to California Floristic Province and DesertsNo
  • Date Added1995/11/01

Characteristic Species

Salix lucida is dominant or co-dominant in the tree canopy with Acer macrophyllum, Alnus rhombifolia, Cornus sericea, Platanus racemosa, Populus fremontii, Populus trichocarpa, Quercus agrifolia, Salix spp. and Sambucus nigra.

Vegetation Layers

Plants < 20 m; canopy is intermittent to continuous. Shrub layer is sparse to intermittent. Herbaceous layer is variable.

Membership Rules

  • Salix lucida ssp. lasiandra > 40% absolute cover in the overstory without other strong woody dominants (Hickson and Keeler-Wolf 2007).
  • Salix lucida ssp. lasiandra > 50% relative cover in the overstory; S. lasiolepis usually present with low cover (Keeler-Wolf et al. 2003a).
  • Salix lucida ssp. lasiandra > 50% relative cover in the tree canopy, sometimes with higher or similar cover by shrubs in the understory (Buck-Diaz et al. 2021, Sikes et al. 2021, Sikes et al. 2023).


Low-gradient depositions along rivers, streams, some are tidally influenced. The USFWS Wetland Inventory (1996 national list) recognizes Salix lucida as an OBL plant.

Other Habitat, Alliance and Community Groupings

MCV (1995) Pacific willow series
NVCS (2009) Salix lucida seasonally flooded forest alliance, Salix lucida temporarily flooded shrubland alliance, Salix lucida temporarily flooded woodland alliance
Calveg Willow, Willow-Alder
Holland Freshwater swamp, Central Coast cottonwood-sycamore riparian forest, Southern cottonwood-willow riparian forest, Great Valley mixed riparian forest, Central Coast riparian scrub, Southern willow scrub, Great Valley willow scrub
Munz Not treated
WHR Valley foothill riparian
CDFW CA Code 61.204.00

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 riparian deciduous forest