Quercus engelmannii Forest & Woodland Alliance
Engelmann oak woodland and forest

USDA Ecological Section Map

Summary Information

  • Primary Life FormTree
  • Elevation50-1220 m
  • State RarityS3
  • Global RarityG3
  • DistributionUSA: CA. Baja California, Mexico (TJM2)
  • Endemic to CaliforniaNo
  • Endemic to California Floristic Province and DesertsYes
  • Date Added1995/11/01

Characteristic Species

Quercus engelmannii is dominant or co-dominant in the tree canopy with Juglans californica, Quercus agrifolia and Quercus kelloggii.

Vegetation Layers

Trees < 18 m tall; canopy is open (greater than 10%) to continuous, or savanna-like (less than 10%, but evenly distributed). Shrub layer is sparse to intermittent. Herbaceous layer is sparse or grassy.

Membership Rules

  • Quercus engelmannii > 30% relative cover in the tree canopy (Evens and San 2005, Klein and Evens 2005).


Raised stream terraces along stream corridors, valley bottoms, and gentle lower slopes.

Other Habitat, Alliance and Community Groupings

MCV (1995) Engelmann oak series
NVCS (2009) Quercus engelmannii woodland alliance
Calveg Engelmann oak
Holland Open Engelmann oak woodland, Dense Engelmann oak woodland
Munz Southern oak woodland
WHR Coastal oak woodland
CDFW CA Code 71.070.00

National Vegetation Classification Hierarchy

Formation Class Mesomorphic Tree Vegetation (Forest and Woodland)
Formation Subclass Temperate Forest
Formation Warm Temperate Forest
Division Madrean Forest and Woodland
Macro Group California Forest and Woodland
Group Californian broadleaf forest and woodland