Print Report
CEGL003479 Purshia tridentata - Artemisia tridentata / Achnatherum nelsonii Shrubland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Antelope Bitterbrush - Big Sagebrush / Columbia Needlegrass Shrubland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This shrubland association is currently only known from Yosemite National Park in California, and the following description is based on occurrences there. Additional information will be added as it becomes available. The known stands of this association are found at 2590-2620 m (8500-8600 feet) elevation on north to east aspects. Stands prefer moderate to steep upper slopes. The soils are well-drained loamy sands derived from metamorphic or igneous rocks. This low, moderately dense (40-60% cover of shrubs) shrubland is codominated by Purshia tridentata and Artemisia tridentata, which form an open to intermittent canopy between 0.5-1 m in height. Symphoricarpos rotundifolius also contributes a trace of cover to the shrub canopy. The herbaceous layer is fairly sparse and dominated by graminoids, including Achnatherum nevadense, Elymus elymoides, Bromus carinatus, Bromus tectorum (exotic), and Leymus triticoides. Forbs commonly found in this association in trace amounts include Eriogonum spergulinum, Phacelia humilis, Phacelia ramosissima, Phlox stansburyi, Crepis acuminata, Cryptantha echinella, Mentzelia albicaulis, Navarretia breweri, Pleiacanthus spinosus, and/or Viola purpurea.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: The subspecies of Artemisia tridentata in this association is likely to be Artemisia tridentata ssp. vaseyana.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: This low, moderately dense (40-60% cover of shrubs) shrubland is codominated by Purshia tridentata and Artemisia tridentata, which form an open to intermittent canopy between 0.5-1 m in height. Symphoricarpos rotundifolius also contributes a trace of cover to the shrub canopy. The herbaceous layer is fairly sparse and dominated by graminoids, including Achnatherum nevadense, Elymus elymoides, Bromus carinatus, Bromus tectorum (exotic), and Leymus triticoides. Forbs commonly found in this association in trace amounts include Eriogonum spergulinum, Phacelia humilis, Phacelia ramosissima, Phlox stansburyi, Crepis acuminata, Cryptantha echinella, Mentzelia albicaulis, Navarretia breweri, Pleiacanthus spinosus (= Stephanomeria spinosa), and/or Viola purpurea.
Dynamics: No Data Available
Environmental Description: The known stands of this association are found at 2590-2620 m (8500-8600 feet) elevation on north to east aspects. Stands prefer moderate to steep upper slopes. The soils are well-drained loamy sands derived from metamorphic or igneous rocks.
Geographic Range: This shrubland association is currently only known from east of the Sierra Crest in Yosemite National Park in California. Additional range information will be added as it becomes available.
Nations: US
States/Provinces: CA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.688049
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.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.3 Big Sagebrush - Threetip Sagebrush - Antelope Bitterbrush Steppe & Shrubland Macrogroup | M169 | 3.B.1.Ne.3 |
| Group | 3.B.1.Ne.3.b Basin Big Sagebrush - Threetip Sagebrush - Antelope Bitterbrush Big Sagebrush Steppe & Shrubland Group | G302 | 3.B.1.Ne.3.b |
| Alliance | A3179 Antelope Bitterbrush - Big Sagebrush Mesic Steppe & Shrubland Alliance | A3179 | 3.B.1.Ne.3.b |
| Association | CEGL003479 Antelope Bitterbrush - Big Sagebrush / Columbia Needlegrass Shrubland | CEGL003479 | 3.B.1.Ne.3.b |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Purshia tridentata - Artemisia tridentata/Achnatherum nevadense - (Achnatherum nelsonii ssp. dorei)
Shrubland [Provisional] (Keeler-Wolf et al. 2012)
= Purshia tridentata / Achnatherum nelsonii (Sawyer et al. 2009) [35.200.04]
Shrubland [Provisional] (Keeler-Wolf et al. 2012)
= Purshia tridentata / Achnatherum nelsonii (Sawyer et al. 2009) [35.200.04]
- Keeler-Wolf, T., M. Schindel, S. San, P. Moore, and D. Hickson. 2003a. Classification of the vegetation of Yosemite National Park and surrounding environs in Tuolumne, Mariposa, Madera and Mono counties, California. Unpublished report by NatureServe in cooperation with the California Native Plant Society and California Department of Fish and Game, Wildlife and Habitat Data Analysis Branch, Sacramento, CA.
- Keeler-Wolf, T., P. E. Moore, E. T. Reyes, J. M. Menke, D. N. Johnson, and D. L. Karavidas. 2012. Yosemite National Park vegetation classification and mapping project report. Natural Resource Technical Report NPS/YOSE/NRTR--2012/598. 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.