Print Report
CEGL002871 Quercus lobata / Annual Grass-Herb Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Valley Oak / Annual Grass-Herb Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This association is known from northern, central and southern coastal California. This woodland association occurs on flat to steep slopes with variable aspect at low elevations between 230 and 418 m. It is dominated by Quercus lobata in the tree layer and various herbs and grasses such as Brassica nigra, Bromus diandrus, and Lactuca serriola in the herbaceous layer.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: The association name has been modified somewhat from Allen et al. (1991), where it was called Quercus lobata / Grass. The renaming here suggests that it also includes annual forbs, as well as grasses.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Valley oak is the dominant tree in the overstory in open to moderately open woodlands. Shrub species are rarely present, and grasses are in high abundance. Stands of this association at Santa Monica Mountains National Recreation Area form a sparse to intermittent tree layer (4-41%, mean 15.8%) with hardwoods at 2-15 m tall, a sparse shrub layer (0-5%, mean 1%) at 0-5 m tall, and an open to intermittent herbaceous layer (16-53%, mean 28.3%) at 0-2 m tall. Total vegetation cover is 20-60%; mean cover is 42.3%. In this association, the tree layer is dominated by Quercus lobata. Quercus agrifolia is occasionally included in this layer. The shrub layer is sparse and infrequently includes species such as Baccharis salicifolia and Salvia leucophylla. The herbaceous layer is dominated by non-native species, characteristically including Brassica nigra and Bromus diandrus. Other herbs often include Lactuca serriola, Bromus sp., Erodium sp., and other grasses and forbs.
Dynamics: Until further inventory is completed, there is no global information.
Environmental Description: The association occurs on mostly loamy soils of granitic or sedimentary parent material. It occurs on all aspects with slope usually less than 35% and elevation below 1710 m.
Geographic Range: This association is known from northern, central and southern coastal California from Mendocino to Los Angeles counties inland to Contra Costa, Santa Clara, San Benito, and Kern counties.
Nations: US
States/Provinces: CA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.788743
Confidence Level: Moderate
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 | CEGL002871 Valley Oak / Annual Grass-Herb Woodland | CEGL002871 | 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 / grass (Sawyer et al. 2009) [71.040.05]
= Quercus lobata/Annual Grass-Herb Woodland/Forest Association (Keeler-Wolf and Evens 2006)
= Valley Oak/Grass (Allen et al. 1991)
= Quercus lobata/Annual Grass-Herb Woodland/Forest Association (Keeler-Wolf and Evens 2006)
= Valley Oak/Grass (Allen et al. 1991)
- Allen, B. H., R. R. Everet, and B. A. Holzman. 1991. A classification system for California''s hardwood rangelands. Hilgardia 59:1-45.
- 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., 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.
- 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.