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CEGL005061 Ambrosia dumosa - Encelia farinosa Dwarf-shrubland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Burrobush - Brittlebush Dwarf-shrubland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This white bursage shrubland association occurs in Arizona, California and Nevada. It is currently described from Grand Canyon National Park and Grand Canyon-Parashant National Monument in Arizona. More survey and classification work are needed to fully characterize this type. This association primarily occurs on sideslopes at approximately 425 to 850 m (1375-2800 feet) elevation; it uncommonly occurs as high as 1050 m (3425 feet). It is typically found on moderately sloping gradients (10-20°), but occasionally occurs on much steeper slopes (30-40°) as well. Soils are well- to rapidly-drained silty or sandy loams that rarely contain clay. The underlying geology is usually limestone, shale, or infrequently basalt or quartzite. Vegetation is characterized by the codominance of the dwarf-shrub Ambrosia dumosa and the short shrub Encelia farinosa. Tall shrubs are rare, but some stands sporadically contain Larrea tridentata. The short-shrub layer frequently includes Ephedra aspera and Ferocactus cylindraceus. The cacti Opuntia polyacantha and Opuntia basilaris sporadically occur in the dwarf-shrub stratum. Bromus rubens and Dasyochloa pulchella commonly occur in a very weakly-developed graminoid layer. Eriogonum inflatum and Sphaeralcea grossulariifolia occasionally occur in a relatively sparse forb understory.
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 the codominance of the dwarf-shrub Ambrosia dumosa and the short shrub Encelia farinosa. Tall shrubs are rare, but some stands sporadically contain Larrea tridentata. The short-shrub layer frequently includes Ephedra aspera (= Ephedra fasciculata) and Ferocactus cylindraceus. The cacti Opuntia polyacantha and Opuntia basilaris sporadically occur in the dwarf-shrub stratum. Bromus rubens and Dasyochloa pulchella commonly occur in a very weakly-developed graminoid layer. Eriogonum inflatum and Sphaeralcea grossulariifolia occasionally occur in a relatively sparse forb understory.
Dynamics: No Data Available
Environmental Description: This association primarily occurs on sideslopes at approximately 425 to 850 m (1375-2800 feet) elevation; it uncommonly occurs as high as 1050 m (3425 feet). It is typically found on moderately sloping gradients (10-20°), but occasionally occurs on much steeper slopes (30-40°) as well. Soils are well- to rapidly-drained silty or sandy loams that rarely contain clay. The underlying geology is usually limestone, shale, or infrequently basalt or quartzite.
Geographic Range: This shrubland association occurs in Arizona, California and Nevada. More survey work is needed to fully document its global range.
Nations: US
States/Provinces: AZ, CA, NV
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.840538
Confidence Level: Low - Poorly Documented
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 | A4215 Brittlebush Desert Scrub Alliance | A4215 | 3.A.2.Na.4.b |
| Association | CEGL005061 Burrobush - Brittlebush Dwarf-shrubland | CEGL005061 | 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: = Ambrosia dumosa - Encelia farinosa (Sawyer et al. 2009) [33.060.06]
= Ambrosia dumosa - Encelia farinosa Dwarf-shrubland (Keeler-Wolf et al. 1998a)
= Ambrosia dumosa - Encelia farinosa Dwarf-shrubland (Reid and Hall 2010)
= Encelia farinosa - Ambrosia dumosa Association (Evens et al. 2012)
= Encelia farinosa-Ambrosia dumosa Association (Evens et al. 2014)
= Ambrosia dumosa - Encelia farinosa Dwarf-shrubland (Keeler-Wolf et al. 1998a)
= Ambrosia dumosa - Encelia farinosa Dwarf-shrubland (Reid and Hall 2010)
= Encelia farinosa - Ambrosia dumosa Association (Evens et al. 2012)
= Encelia farinosa-Ambrosia dumosa Association (Evens et al. 2014)
- 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.
- Kearsley, M. J. C., K. Green, M. Tukman, M. Reid, M. Hall, T. J. Ayers, and K. Christie. 2015. Grand Canyon National Park-Grand Canyon / Parashant National Monument vegetation classification and mapping project. Natural Resource Report NPS/GRCA/NRR--2015/913. National Park Service, Fort Collins, CO. 75 pp. plus appendices.
- Keeler-Wolf, T., C. Roye, and K. Lewis. 1998a. Vegetation mapping and classification of the Anza-Borrego Desert State Park, California. Unpublished report on file at California Natural Diversity Database, California Department Fish and Game, Sacramento.
- Reid, M. S., and M. E. Hall. 2010. Vegetation classification of Grand Canyon National Park. Draft report submitted to National Park Service, Fort Collins, CO.
- 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.