Print Report
CEGL003117 Yucca schidigera / Pleuraphis rigida Shrubland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Mojave Yucca / Big Galleta Shrubland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This association is currently only described from Joshua Tree National Park, California. Additional global information will be added as it becomes available. This association is known from hot deserts of California, including in Anza-Borrego State Park, Joshua Tree National Park, and generally in the central Mojave Desert. Stands of the association at Joshua Tree are found at mid to high elevations (1000-1200 m [3500-4100 feet]) on flat to moderate (0-6°) slopes. These sites are found on bajadas and rocky hillslopes facing southwest, northeast and northwest. Soils range from medium sand to moderately fine silty clay loams derived from granitic parent material. Ground cover in this association consists of a mix of bedrock, boulder, stone, cobble, gravel, and fine material. The amount of vegetative litter is highly variable. This association experiences low to high levels of disturbance from competition from exotics. Stands of the association form a sparse shrubland with 0-2% cover for the tree/tall stratum, 7-37% cover for the shrub/medium stratum, and <1-15% cover for the herb/low stratum. Total vegetative cover ranges from 10-38%. This association is dominated by Pleuraphis rigida in the understory herb layer. Characteristically present in the shrub layer is Ambrosia dumosa, Cylindropuntia echinocarpa, Larrea tridentata, Simmondsia chinensis, and Yucca schidigera, though Yucca schidigera exhibits highest average cover, and Ambrosia dumosa and Larrea tridentata have variable though next highest average cover values. Yucca brevifolia is abundant in the shrub layer. Species that are often present in the shrub layer are Cylindropuntia ramosissima, Echinocereus engelmannii, Ephedra nevadensis, Eriogonum fasciculatum, Salazaria mexicana, and Senna armata. Xylorhiza tortifolia often occurs in the herb layer.
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: No Data Available
Dynamics: No Data Available
Environmental Description: No Data Available
Geographic Range: This association is known from hot deserts of California, including in Anza-Borrego State Park, Joshua Tree National Park, and generally in the central Mojave Desert (Sawyer et al. 2009).
Nations: US
States/Provinces: CA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.684036
Confidence Level: Low - Poorly Documented
Confidence Level Comments: No Data Available
Grank: G3?
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 3 Desert & Semi-Desert Class | C03 | 3 |
| Subclass | 3.B Cool Semi-Desert Scrub & Grassland Subclass | S11 | 3.B |
| Formation | 3.B.1 Cool Semi-Desert Scrub & Grassland Formation | F033 | 3.B.1 |
| Division | 3.B.1.Ne Western North American Cool Semi-Desert Scrub & Grassland Division | D040 | 3.B.1.Ne |
| Macrogroup | 3.B.1.Ne.1 Yellow Rabbitbrush - Blackbrush / Indian Ricegrass Dry Shrubland & Grassland Macrogroup | M171 | 3.B.1.Ne.1 |
| Group | 3.B.1.Ne.1.a Joshua Tree - Eastern Mojave Buckwheat - Rough Joint-fir Mixed Desert Scrub Group | G296 | 3.B.1.Ne.1.a |
| Alliance | A3147 Mojave Yucca Scrub Alliance | A3147 | 3.B.1.Ne.1.a |
| Association | CEGL003117 Mojave Yucca / Big Galleta Shrubland | CEGL003117 | 3.B.1.Ne.1.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Yucca schidigera / Pleuraphis rigida (Sawyer et al. 2009) [33.070.12]
= Yucca schidigera / Pleuraphis rigida Association (Evens et al. 2012)
= Yucca schidigera / Pleuraphis rigida Association (Evens et al. 2012)
- 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.
- 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.