Print Report
CEGL001492 Purshia tridentata / Carex inops ssp. inops - Achnatherum occidentale Shrub Grassland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Antelope Bitterbrush / Long-stolon Sedge - Western Needlegrass Shrub Grassland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This rare shrubland was described from 5 good-condition plots on flat, stream terraces, floodplains and dry drainages along the eastern side of the Cascade Range in southern Oregon. Elevations are between 1340 and 1650 m. All known sites are from the Winema National Forest, and much of the habitat has been damaged by overuse by cattle. The soils are deep, alluvial sands deposited over Mazama ash and pumice. Purshia tridentata is the dominant shrub, always present between 5 and 20% cover. In poor condition stands Ericameria bloomeri or Ericameria nauseosa are more important. Achnatherum occidentale and Carex inops ssp. inops are codominant on good-condition stands, although with grazing Elymus elymoides increases. Other forbs include Packera cana, Eriogonum umbellatum, Phacelia hastata, and Cistanthe umbellata. This type is easily distinguished by the dominants and its occurrence on alluvial sands on pumice.
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: Purshia tridentata is the dominant shrub, always present between 5 and 20% cover. In poor condition stands Ericameria bloomeri (= Haplopappus bloomeri) or Ericameria nauseosa (= Chrysothamnus nauseosus) are more important. Achnatherum occidentale (= Stipa occidentalis) and Carex inops ssp. inops are codominant on good condition stands, although with grazing Elymus elymoides increases. Other forbs include Packera cana (= Senecio canus), Eriogonum umbellatum, Phacelia hastata, and Cistanthe umbellata (= Spraguea umbellata).
Dynamics: No Data Available
Environmental Description: This rare shrubland was described from flat, stream terraces, floodplains and dry drainages along the eastern side of the Cascades in southern Oregon. Elevations are between 1340 and 1650 m. All known sites are from the Winema National Forest, and much of the habitat has been damaged by overuse by cattle. The soils are deep, alluvial sands deposited over Mazama ash and pumice.
Geographic Range: Only known from the sandy openings along stream terraces and floodplains in the pumice zone east of Crater Lake, on the Winema National Forest and in Crater Lake National Park in south-central Oregon.
Nations: US
States/Provinces: OR
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.689807
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G2
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 | CEGL001492 Antelope Bitterbrush / Long-stolon Sedge - Western Needlegrass Shrub Grassland | CEGL001492 | 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 / Carex inops ssp. inops - Achnatherum occidentale Shrub Grassland (DiPaolo et al. 2018)
= Bitterbrush / Needlegrass - Sedge (Volland 1985)
= Bitterbrush / Needlegrass - Sedge (Volland 1976)
= Bitterbrush / Needlegrass - Sedge (Volland 1985)
= Bitterbrush / Needlegrass - Sedge (Volland 1976)
- Bourgeron, P. S., and L. D. Engelking, editors. 1994. A preliminary vegetation classification of the western United States. Unpublished report. The Nature Conservancy, Western Heritage Task Force, Boulder, CO. 175 pp. plus appendix.
- DiPaolo, D. A., D. C. Odion, K. M. Rolih, P. Adamus, and D. A. Sarr. 2018. Vegetation classification and mapping: Crater Lake National Park. Natural Resource Report NPS/CRLA/NRR--2018/1663. National Park Service, Fort Collins, CO. 550 pp.
- Kagan, J. S., J. A. Christy, M. P. Murray, and J. A. Titus. 2004. Classification of native vegetation of Oregon. January 2004. Oregon Natural Heritage Information Center, Portland. 52 pp.
- Volland, L. A. 1976. Plant communities of the central Oregon pumice zone. USDA Forest Service R-6 Area Guide 4-2. Pacific Northwest Region, Portland, OR. 113 pp.
- Volland, L. A. 1985. Plant associations of the central Oregon pumice zone. USDA Forest Service R6-ECOL-104-1985. Pacific Northwest Region, Portland, OR. 138 pp.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.