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CEGL005767 Larrea tridentata - Encelia farinosa - Pleurocoronis pluriseta Desert Shrubland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Creosotebush - Brittlebush - Bush Arrowleaf Desert Shrubland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This association is found at low to mid elevations in the Mojave Desert in Arizona, California and southern Nevada. Vegetation is characterized by a sparse to open shrub canopy (7-16% cover) codominated by Encelia farinosa with Larrea tridentata and Pleurocoronis pluriseta characteristically present to codominant. Other shrubs frequently present include Ambrosia dumosa, Bebbia juncea, Eriogonum fasciculatum, Trixis californica, and Viguiera parishii. If present, the herbaceous layer is sparse and composed of a mixture of grasses and forbs such as Achnatherum speciosum, Adenophyllum porophylloides, Amsinckia spp., Eriogonum inflatum, Cryptantha spp., Stephanomeria pauciflora, various native annuals, and exotic annual grasses Schismus spp. Nonvascular plants include cryptogamic crust and lichens. Stands are found in rocky upland on mid to high slopes ranging from 250-1050 m elevation. Sites occur on gentle to steep slopes on primarily southerly aspects. Soils are rocky and shallow with variable textures ranging from loamy sand to clay and are derived from a variety of substrates such as alluvium, dacite, dune sand, gneiss, granodiorite, rhyolite, sandstone, and schist. Disturbance from exotic species is typically low in this association.
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: Vegetation is characterized by a sparse to open shrub canopy (7-16% cover) codominated by Encelia farinosa with Larrea tridentata and Pleurocoronis pluriseta characteristically present to codominant (Evens et al. 2012, 2014). Other shrubs frequently present include Ambrosia dumosa, Bebbia juncea, Ephedra nevadensis, Eriogonum fasciculatum, Krameria grayi, Simmondsia chinensis, Trixis californica, and Viguiera parishii (Evens et al. 2012, 2014). If present, the herbaceous layer is sparse (to 8% cover) and composed of grasses and forbs such as Achnatherum speciosum, Adenophyllum porophylloides, Amsinckia spp., Chorizanthe brevicornu, Eriogonum inflatum, Cryptantha spp., Galium stellatum, Mirabilis laevis var. villosa, Stephanomeria pauciflora, and exotic annual grasses Schismus spp. (Evens et al. 2012, 2014). Nonvascular plants include cryptogamic crust and lichens.
Dynamics: No Data Available
Environmental Description: This association is found at low to mid elevations in the Mojave Desert in Arizona, California and southern Nevada. It occurs primarily in rocky uplands on mid to high slopes ranging from 250-1050 m elevation (Evens et al. 2012, 2014). Sites occur on gentle to steep slopes (to 35°) on primarily southerly aspects. Soils are rocky and shallow with variable textures ranging from loamy sand to clay (Evens et al. 2012, 2014). The rocky component is a variable mixture of bedrock, boulders, cobbles and gravel with low to moderate or high cover of each depending on site (Evens et al. 2012). These soils are derived from a variety of substrates such as alluvium, dacite, dune sand, gneiss, granodiorite, rhyolite, sandstone, and schist (Evens et al. 2012, 2014). Disturbance from exotic species is typically low in this association (Evens et al. 2012).
Geographic Range: This association is found in the Mojave Desert and was sampled in Lake Mead National Recreation Area in Arizona and Nevada, and Death Valley National Park, Joshua Tree National Park, and Mojave National Preserve in California.
Nations: US
States/Provinces: AZ, CA, NV
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.971739
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: GNR
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 3 Desert & Semi-Desert Class | C03 | 3 |
| Subclass | 3.A Warm Desert & Semi-Desert Woodland, Scrub & Grassland Subclass | S06 | 3.A |
| Formation | 3.A.2 Warm Desert & Semi-Desert Scrub & Grassland Formation | F015 | 3.A.2 |
| Division | 3.A.2.Na North American Warm Desert Scrub & Grassland Division | D039 | 3.A.2.Na |
| Macrogroup | 3.A.2.Na.4 Saguaro - Organ Pipe Cactus - Burrobush Mojave-Sonoran Semi-Desert Scrub Macrogroup | M088 | 3.A.2.Na.4 |
| Group | 3.A.2.Na.4.b Creosotebush - Burrobush - Brittlebush Desert Scrub Group | G295 | 3.A.2.Na.4.b |
| Alliance | A3278 Creosotebush - Ocotillo Upper Bajada & Rock Outcrop Desert Scrub Alliance | A3278 | 3.A.2.Na.4.b |
| Association | CEGL005767 Creosotebush - Brittlebush - Bush Arrowleaf Desert Shrubland | CEGL005767 | 3.A.2.Na.4.b |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Larrea tridentata - Encelia farinosa - Pleurocoronis pluriseta (Sawyer et al. 2009) [33.027.07]
= Larrea tridentata - Encelia farinosa - Pleurocoronis pluriseta Association (Evens et al. 2012)
= Larrea tridentata-Encelia farinosa-Pleurocoronis pluriseta Association (Evens et al. 2014)
= Larrea tridentata-Encelia farinosa-Pleurocoronis pluriseta Association (Keeler-Wolf and Thomas 2000)
< Larrea tridentata-Encelia farinosa Shrubland Alliance (Keeler-Wolf and Thomas 2000)
= Larrea tridentata - Encelia farinosa - Pleurocoronis pluriseta Association (Evens et al. 2012)
= Larrea tridentata-Encelia farinosa-Pleurocoronis pluriseta Association (Evens et al. 2014)
= Larrea tridentata-Encelia farinosa-Pleurocoronis pluriseta Association (Keeler-Wolf and Thomas 2000)
< Larrea tridentata-Encelia farinosa Shrubland Alliance (Keeler-Wolf and Thomas 2000)
- Evens, J. M., D. Roach-McIntosh, and D. Stout. 2012. Vegetation descriptions for Joshua Tree National Park. Unpublished report submitted to USDI, National Park Service, Mojave Desert Inventory and Monitoring Network. California Native Plant Society, Sacramento, CA.
- Evens, J. M., K. Sikes, D. Hastings, and J. Ratchford. 2014. Vegetation alliance descriptions for Lake Mead National Recreation Area, Death Valley National Park and Mojave National Preserve. Unpublished report submitted to USDI National Park Service, Mojave Desert Network Inventory and Monitoring Program. California Native Plant Society, Sacramento, CA.
- Keeler-Wolf, T., and K. Thomas. 2000. Draft descriptions of vegetation alliances for the Mojave Ecosystem Mapping project. California Natural Diversity Database, California Department of Fish and Game, Sacramento.
- 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.