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CEGL001515 Aristida purpurea var. longiseta - Sporobolus cryptandrus Grassland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Red Three-awn - Sand Dropseed Grassland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This grassland community is found in Oregon and Washington, and may occur in Idaho. Stands are found at elevations of 370-460 m (1200-1500 feet) on terraces and alluvial bars associated with the Snake River. Slopes are 5-22% with variable aspects. Soils are silt or sandy loams underlain by gravel and rock. This vegetation is codominated by Sporobolus cryptandrus, Aristida purpurea var. longiseta, and introduced annual Bromus spp. with 15%, 14%, and 36% cover, respectively. Non-native forbs Hypericum perforatum and Erodium cicutarium are important with 5% and 1% cover, respectively. In the absence of significant livestock use, this community would have increased cover of Sporobolus cryptandrus and Aristida purpurea var. longiseta, and no introduced species.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: Only three plots were inventoried.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: This vegetation is codominated by Sporobolus cryptandrus, Aristida purpurea var. longiseta, and introduced annual Bromus spp. with 15%, 14%, and 36% cover, respectively. Non-native forbs Hypericum perforatum and Erodium cicutarium are important with 5% and 1% cover, respectively. In the absence of significant livestock use, this community would have increased cover of Sporobolus cryptandrus and Aristida purpurea var. longiseta, and no introduced species.
Dynamics: No Data Available
Environmental Description: Stands are found at elevations of 370-460 m (1200-1500 feet) on terraces and alluvial bars associated with the Snake River. Slopes are 5-22% with variable aspects. Soils are silt or sandy loams underlain by gravel and rock.
Geographic Range: Known only from Oregon and Washington in Hells Canyon, and further upstream along the Snake and lower Owyhee rivers. Documented occurrences for Washington have not been found, although they existed before the reservoirs were built. If the four lower Snake dams are breached, habitat may reappear.
Nations: US
States/Provinces: ID?, OR, WA
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.688561
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G1
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.c James'' Galleta - Indian Ricegrass - Needle-and-Thread Semi-Desert Grassland Group | G311 | 3.B.1.Ne.1.c |
| Alliance | A3977 Sand Dropseed - Red Three-awn - Sandberg Bluegrass Sandy Stream Terrace Grassland Alliance | A3977 | 3.B.1.Ne.1.c |
| Association | CEGL001515 Red Three-awn - Sand Dropseed Grassland | CEGL001515 | 3.B.1.Ne.1.c |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: No Data Available
- 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.
- Johnson, C. G., Jr., and S. A. Simon. 1987. Plant associations of the Wallowa-Snake Province Wallowa-Whitman National Forest. Technical Paper R6-ECOL-TP-255A-86. USDA Forest Service, Pacific Northwest Region, Wallowa-Whitman National Forest. 399 pp. plus appendices.
- 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.
- WNHP [Washington Natural Heritage Program]. 2018. Unpublished data files. Washington Natural Heritage Program, Department of Natural Resources, Olympia, WA.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.