Print Report
CEGL002884 Hazardia squarrosa / Nassella pulchra Shrubland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Sawtooth Goldenbush / Purple Needlegrass Shrubland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This association is only known from the Santa Monica Mountains region. This herbaceous association occurs on gentle to steep often northeast or northwest slopes at low elevations between 52 and 422 m. Nassella pulchra is characteristically abundant in the herbaceous layer. Hazardia squarrosa is characteristically found in the shrub layer at low cover, and Artemisia californica is also usually present in this layer.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: This is the most common native grassland in the Santa Monica Mountains study area. It shows a transitional and seral nature to scrubland by the constant presence of Hazardia squarrosa, a common early-seral perennial sub-shrub of coastal southern California. Further, Hazardia squarrosa / Nassella pulchra - Hemizonia fasciculata Shrubland Association is also defined in the study area (Keeler-Wolf and Evens 2006), where the shrub layer is more developed. It would be useful to monitor several of these local stands with different fire histories to gain a better understanding of the persistence of this association under different fire regimes and soil types.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: Stands of this association at Santa Monica Mountains National Recreation Area form an open to intermittent herbaceous layer (19-55%, mean 39.5%) at 0.01-1 m tall. The shrub layer is sparse to open (0-13%, mean 5%) at 0.01-2 m tall. Total vegetation cover is 28-58%; mean cover is 44.4%. In this association, the herbaceous layer is open to intermittent and Nassella pulchra is characteristically abundant. A variety of other herbaceous species occur and may be subdominant. For example, Avena fatua is often present, and Calochortus catalinae, Sisyrinchium bellum, Hemizonia fasciculata, Bromus madritensis, Bromus hordeaceus, Brassica nigra, and Erodium cicutarium are sometimes found in this layer. The shrub layer characteristically includes Hazardia squarrosa and often includes Artemisia californica at low cover.
Dynamics: Until further inventory is completed, there is no global information.
Environmental Description: Until further inventory is completed, there is no global information.
Geographic Range: This association is only known from the Santa Monica Mountains region. Information about its global distribution is not available without additional inventory. Other associations of this alliance range throughout cismontane California.
Nations: US
States/Provinces: CA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.788786
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G3
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 2 Shrub & Herb Vegetation Class | C02 | 2 |
| Subclass | 2.B Temperate & Boreal Grassland & Shrubland Subclass | S18 | 2.B |
| Formation | 2.B.1 Mediterranean Scrub & Grassland Formation | F038 | 2.B.1 |
| Division | 2.B.1.Na Californian Scrub & Grassland Division | D327 | 2.B.1.Na |
| Macrogroup | 2.B.1.Na.2 Coastal Sagebrush - Black Sage - Coyotebrush Coastal Scrub Macrogroup | M044 | 2.B.1.Na.2 |
| Group | 2.B.1.Na.2.a Common Deerweed - Yerba Santa species - Silver Lupine Coastal-Foothill Seral Scrub Group | G782 | 2.B.1.Na.2.a |
| Alliance | A3887 Sawtooth Goldenbush - Palmer''s Goldenbush Scrub Alliance | A3887 | 2.B.1.Na.2.a |
| Association | CEGL002884 Sawtooth Goldenbush / Purple Needlegrass Shrubland | CEGL002884 | 2.B.1.Na.2.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: ? Hazardia squarrosa / Nassella pulchra - Deinandra fasciculata (Sawyer et al. 2009) [32.055.01]
< Hazardia squarrosa Shrubland Alliance (Sawyer and Keeler-Wolf 1995)
= Nassella pulchra - Hazardia squarrosa Herbaceous Association (Keeler-Wolf and Evens 2006)
< Valley Needlegrass Grassland (#42110) (Holland 1986b)
< Hazardia squarrosa Shrubland Alliance (Sawyer and Keeler-Wolf 1995)
= Nassella pulchra - Hazardia squarrosa Herbaceous Association (Keeler-Wolf and Evens 2006)
< Valley Needlegrass Grassland (#42110) (Holland 1986b)
- Holland, R. F. 1986b. Preliminary descriptions of the terrestrial natural communities of California. Unpublished report prepared for the California Department of Fish and Game, Nongame-Heritage Program and Natural Diversity Database, Sacramento. 156 pp.
- 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.