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CEGL002872 Quercus lobata - Quercus agrifolia / Annual Grass-Herb Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Valley Oak - California Live Oak / Annual Grass-Herb Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This woodland is known from central to southern California. It occurs on gentle to steep slopes with variable aspects at low elevations between 91 and 1158 m. It is usually found on deep clay, sand, or rocky to clay loam soils. It is dominated by Quercus agrifolia and Quercus lobata in the tree layer and Brassica nigra in the herbaceous layer. Other tree species may include Juglans californica and Pseudotsuga menziesii at low cover. The shrub layer is sparse to intermittent with an herbaceous understory that may include Hirschfeldia incana, Centaurea melitensis, Lactuca serriola, Marrubium vulgare, Eriogonum elongatum, and the graminoids Bromus diandrus or Leymus condensatus.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: It remains to be seen if the presence of certain southern California shrubs such as Salvia leucophylla in about one-third of the samples is sufficient to differentiate the local stands from other similar stands in northern and central California.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: These are moderately open to very open woodlands (10-50% tree cover), with a shared dominance of Quercus lobata and Quercus agrifolia along with a largely herbaceous understory of grasses and herbs. Other tree species that may be present with low cover include Juglans californica and Pseudotsuga menziesii. The shrub layer is sparse to intermittent and occasionally includes Artemisia californica, Eriogonum fasciculatum var. foliolosum, Salvia leucophylla, Sambucus nigra ssp. cerulea (= Sambucus mexicana), and Hazardia squarrosa. The herbaceous layer may include the forbs Artemisia dracunculus, Brassica nigra, Hirschfeldia incana, Centaurea melitensis, Lactuca serriola, Marrubium vulgare, Eriogonum elongatum, and the graminoids Bromus diandrus or Leymus condensatus
Dynamics: No Data Available
Environmental Description: This woodland is usually found on deep clay, sand and sandy loam, on rocky and clay loam soils, on sandstones, shales or mixed alluvium at elevations ranging from near sea level to over 1100 m. It occurs on gentle to steep slopes (0-13°), at all aspects.
Geographic Range: This association is known from central to southern California ranging from Santa Clara County to Los Angeles County and inland to Kern, Merced, San Benito, and Santa Clara counties.
Nations: US
States/Provinces: CA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.788746
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G4
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 1 Forest & Woodland Class | C01 | 1 |
| Subclass | 1.B Temperate & Boreal Forest & Woodland Subclass | S15 | 1.B |
| Formation | 1.B.1 Warm Temperate Forest & Woodland Formation | F018 | 1.B.1 |
| Division | 1.B.1.Nc Californian Forest & Woodland Division | D007 | 1.B.1.Nc |
| Macrogroup | 1.B.1.Nc.1 California Live Oak - California Laurel - Western Cypress species Forest & Woodland Macrogroup | M009 | 1.B.1.Nc.1 |
| Group | 1.B.1.Nc.1.a California Live Oak - Valley Oak - California Laurel Forest & Woodland Group | G195 | 1.B.1.Nc.1.a |
| Alliance | A3347 Valley Oak Woodland Alliance | A3347 | 1.B.1.Nc.1.a |
| Association | CEGL002872 Valley Oak - California Live Oak / Annual Grass-Herb Woodland | CEGL002872 | 1.B.1.Nc.1.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Quercus lobata - Quercus agrifolia / Annual Grass - Herb Woodland (Keeler-Wolf 2002)
= Quercus lobata - Quercus agrifolia / grass (Sawyer et al. 2009) [71.040.06]
= Quercus lobata-Quercus agrifolia/Annual Grass-Herb Woodland/Forest Association (Keeler-Wolf and Evens 2006)
= Valley Oak - Coast Live Oak / Grass (Allen et al. 1989)
= Quercus lobata - Quercus agrifolia / grass (Sawyer et al. 2009) [71.040.06]
= Quercus lobata-Quercus agrifolia/Annual Grass-Herb Woodland/Forest Association (Keeler-Wolf and Evens 2006)
= Valley Oak - Coast Live Oak / Grass (Allen et al. 1989)
- 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.
- Keeler-Wolf, T. 2002. Classification of the vegetation of Yosemite National Park and surrounding environs in Tuolumne, Mariposa, Madera and Mono counties, California. NatureServe in cooperation with the California Native Plant Society and California Natural Heritage Program, Wildlife and Habitat Data Analysis Branch, California Department of Fish and Game, Sacramento, CA. August 2002.
- Keeler-Wolf, T., and J. Evens. 2006. Vegetation classification of the Santa Monica Mountains National Recreation Area and environs in Ventura and Los Angeles counties, California. A report submitted to National Park Service, Santa Monica Mountains National Recreation Area by California Department of Fish and Game, Wildlife and Habitat Data Analysis Branch and The California Native Plant Society, Vegetation Program, Sacramento, CA.
- 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.
- 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.
- Sawyer, J. O., and T. Keeler-Wolf. 1995. A manual of California vegetation. California Native Plant Society, Sacramento. 471 pp.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.