Print Report

CEGL005312 Quercus agrifolia / Toxicodendron diversilobum Riparian Woodland

Type Concept Sentence: No Data Available


Common (Translated Scientific) Name: California Live Oak / Pacific Poison-oak Riparian Woodland

Colloquial Name: No Data Available

Hierarchy Level:  Association

Type Concept: This riparian and mesic woodland occurs along gentle to steep, intermittently flooded streams in the interior coastal mountains of central and southern California, from Marin to San Diego counties. Quercus agrifolia is the dominant tree; other trees that may be infrequently to often present in low cover include Salix laevigata, Quercus engelmannii, Pinus sabiniana, Populus balsamifera, and Populus fremontii. Toxicodendron diversilobum is characteristically present and usually dominant in the shrub understory. Other shrub species such as Salix lasiolepis, Rubus ursinus, and Baccharis salicifolia may also occur. Herbs may include the forbs Anthriscus caucalis, Galium aparine, Galium porrigens var. porrigens, and Marah fabaceus, and the graminoids Carex sp., Agrostis sp., and Bromus diandrus.

Diagnostic Characteristics: No Data Available

Rationale for Nominal Species or Physiognomic Features: No Data Available

Classification Comments: No Data Available

Similar NVC Types: No Data Available
note: No Data Available

Physiognomy and Structure: No Data Available

Floristics: In this association Quercus agrifolia is the dominant tree; other trees that may be infrequently to often present in low cover include Salix laevigata, Quercus engelmannii, Pinus sabiniana, Populus balsamifera, and Populus fremontii. Toxicodendron diversilobum is characteristically present and usually dominant in the shrub understory. Other shrub species such as Salix lasiolepis, Rubus ursinus, and Baccharis salicifolia may also occur from time to time. Herbs may include the forbs Anthriscus caucalis, Galium aparine, Galium porrigens var. porrigens, and Marah fabaceus, and the graminoids Carex sp., Agrostis sp., and Bromus diandrus (exotic).

Dynamics:  No Data Available

Environmental Description:  This riparian and mesic woodland occurs along gentle to steep, intermittently flooded streams.

Geographic Range: This association is known from interior coastal mountains of central and southern California, from Marin to San Diego counties.

Nations: US

States/Provinces:  CA




Confidence Level: Moderate

Confidence Level Comments: No Data Available

Grank: GNR

Greasons: No Data Available


Concept Lineage: No Data Available

Predecessors: No Data Available

Obsolete Names: No Data Available

Obsolete Parents: No Data Available

Synonomy: = Quercus agrifolia / Toxicodendron diversilobum Intermittently Flooded Woodland (Kittel et al. 2012a)
= Quercus agrifolia / Toxicodendron diversilobum Riparian Association (Evens and San 2006)
= Quercus agrifolia / Toxicodendron diversilobum riparian (Sawyer et al. 2009) [71.060.39]
= Quercus agrifolia / Toxicodendron diversilobum Riparian Association (Klein and Evens 2006)
= Coast Live Oak / Poison Oak (Allen et al. 1989)
= Coast Live Oak / Poison Oak / Grass (Allen et al. 1989)

Concept Author(s): G. Kittel et al. (2012a)

Author of Description: G. Kittel and J. Evens

Acknowledgements: No Data Available

Version Date: 09-24-07

  • Allen, B. H., R. R. Evett, B. A. Holzman, and A. J. Martin. 1989. Report on rangeland cover type description for California hardwood rangelands. Department of Forestry and Fire Protection and Department of Forestry and Resource Management. Berkeley, CA.
  • Evens, J., and S. San. 2006. Vegetation alliances of the San Dieguito River Park region, San Diego County, California. Final report (August 2005) Version 2 (revised May 2006). Prepared by California Native Plant Society in cooperation with the California Natural Heritage Program of the California Department of Fish and Game and San Diego Chapter of the California Native Plant Society. Sacramento, CA. 271 pp.
  • Kittel, G., E. Reyes, J. Evens, J. Buck, and D. Johnson. 2012a. Vegetation classification and mapping project report, Pinnacles National Monument. Natural Resource Report NPS/SFAN/NRR-2012/574. National Park Service, Fort Collins, CO. 428 pp.
  • Klein, A., and J. Evens. 2006. Vegetation alliances of western Riverside County, California. Contract Number: P0185404. Final report prepared for The California Department of Fish and Game, Habitat Conservation Division. California Native Plant Society, Sacramento, CA. 332 pp. [http://www.dfg.ca.gov/biogeodata/vegcamp/pdfs/VegMappingRpt_Western_Riverside.pdf]
  • Sawyer, J. O., T. Keeler-Wolf, and J. Evens. 2009. A manual of California vegetation. Second edition. California Native Plant Society, Sacramento CA. 1300 pp.
  • Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.