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CEGL000835 Pinus monophylla - Juniperus osteosperma / Leymus cinereus Wooded Grassland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Singleleaf Pinyon - Utah Juniper / Basin Wildrye Wooded Grassland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: This association has been described from a small region in south-central Idaho at the southern end of the Albion Mountains, Cassia County, Idaho. Two evergreen needle-leaved trees dominate the canopy, Pinus monophylla and Juniperus osteosperma, with total cover of 30-70%. Pinus monophylla is always present, while the Juniperus is present with varying frequency. There is no shrub layer. The herbaceous understory is dominated by the tall perennial bunchgrass Leymus cinereus. This association occurs in a mountainous region that is part of the northern extension of the Basin and Range Province into Idaho. This region is characterized by a series of parallel mountain ranges oriented in a north-south direction. The intervening valleys are wide and floored with sediments from ancient Lake Bonneville. The southern Albion Mountains, where this association is found, are a complex of four gneiss domes, aligned along a north-south axis. Landforms associated with these domes include steep-sided ridges, and erosional features such as tors and linear rock ridges enclosing narrow canyons. Rock types include granodiorite, gneiss with bodies of schist, some quartzite, and lenses, pods and sheets of amphibolite. Elevations range from approximately 1830 to 2255 m (6000-7400 feet). Soils are sandy to gravelly and well-drained. Leymus cinereus is known to typically occur on gravelly soils, but especially on those derived from alluvium along washes and gullies. From this it can be inferred that this association may occupy topographic depressions and narrow canyons where alluvial deposition has occurred. It may also occupy small alluvial fans at the base of erosional features such as rock ridges and tors.
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: Little information is available regarding the structure and composition of this association. Two evergreen needle-leaved trees dominate the canopy, Pinus monophylla and Juniperus osteosperma, with total cover of 30-70%. Pinus monophylla is always present, while the Juniperus is present with varying frequency. There is no shrub layer. The herbaceous understory is dominated by the tall perennial bunchgrass Leymus cinereus. No other information is available on plant species cover or composition.
Dynamics: No Data Available
Environmental Description: This association occurs in a mountainous region that is part of the northern extension of the Basin and Range Province into Idaho. This region is characterized by a series of parallel mountain ranges oriented in a north-south direction. The intervening valleys are wide and floored with sediments from ancient Lake Bonneville. The southern Albion Mountains, where this association is found, are a complex of four gneiss domes, aligned along a north-south axis. Landforms associated with these domes include steep-sided ridges, and erosional features such as tors and linear rock ridges enclosing narrow canyons. Rock types include granodiorite, gneiss with bodies of schist, some quartzite, and lenses, pods and sheets of amphibolite.
The climate of the region is characterized as semi-arid, with warm summers and cold winters. Average annual precipitation is 28 cm (11 inches), and shows a peak during April through June, when more than 30% of the annual total is received. The remainder is distributed evenly throughout the year.
More specific information for this association is not available. Elevations range from approximately 1830 to 2255 m (6000-7400 feet). Soils are sandy to gravelly and well-drained. Leymus cinereus is known to typically occur on gravelly soils, but especially on those derived from alluvium along washes and gullies. From this it can be inferred that this association may occupy topographic depressions and narrow canyons where alluvial deposition has occurred. It may also occupy small alluvial fans at the base of erosional features such as rock ridges and tors.
The climate of the region is characterized as semi-arid, with warm summers and cold winters. Average annual precipitation is 28 cm (11 inches), and shows a peak during April through June, when more than 30% of the annual total is received. The remainder is distributed evenly throughout the year.
More specific information for this association is not available. Elevations range from approximately 1830 to 2255 m (6000-7400 feet). Soils are sandy to gravelly and well-drained. Leymus cinereus is known to typically occur on gravelly soils, but especially on those derived from alluvium along washes and gullies. From this it can be inferred that this association may occupy topographic depressions and narrow canyons where alluvial deposition has occurred. It may also occupy small alluvial fans at the base of erosional features such as rock ridges and tors.
Geographic Range: It has been described from a small region in south-central Idaho at the southern end of the Albion Mountains, Cassia County, Idaho. Part of the region is contained in the City of Rocks National Reserve and the City of Rocks RNA.
Nations: US
States/Provinces: ID
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.687673
Confidence Level: Low
Confidence Level Comments: No Data Available
Grank: G1Q
Greasons: No Data Available
| Type | Name | Database Code | Classification Code |
|---|---|---|---|
| Class | 1 Forest & Woodland Class | C01 | 1 |
| Subclass | 1.B Temperate & Boreal Forest & Woodland Subclass | S15 | 1.B |
| Formation | 1.B.2 Cool Temperate Forest & Woodland Formation | F008 | 1.B.2 |
| Division | 1.B.2.Nc Western North American Pinyon - Juniper Woodland & Scrub Division | D010 | 1.B.2.Nc |
| Macrogroup | 1.B.2.Nc.1 Singleleaf Pinyon - Utah Juniper - Western Juniper Intermountain Woodland Macrogroup | M896 | 1.B.2.Nc.1 |
| Group | 1.B.2.Nc.1.c Singleleaf Pinyon - Utah Juniper Woodland Group | G899 | 1.B.2.Nc.1.c |
| Alliance | A2109 Singleleaf Pinyon - Utah Juniper Grassy Open Woodland Alliance | A2109 | 1.B.2.Nc.1.c |
| Association | CEGL000835 Singleleaf Pinyon - Utah Juniper / Basin Wildrye Wooded Grassland | CEGL000835 | 1.B.2.Nc.1.c |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: = Pinus monophylla - Juniperus osteosperma / Leymus cinereus (Caicco and Wellner 1983a)
- 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.
- Caicco, S. L., and C. A. Wellner. 1983a. Research Natural Area recommendation for City of Rocks. Unpublished report prepared for USDI Bureau of Land Management, Burley District, Idaho by Idaho Natural Areas Coordinating Committee. On file at Idaho Conservation Data Center, Boise, ID. 12 pp.
- Western Ecology Working Group of NatureServe. No date. International Ecological Classification Standard: International Vegetation Classification. Terrestrial Vegetation. NatureServe, Boulder, CO.