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CEGL003078 Pinus ponderosa var. washoensis Woodland
Type Concept Sentence: No Data Available
Common (Translated Scientific) Name: Washoe Pine Woodland
Colloquial Name: No Data Available
Hierarchy Level: Association
Type Concept: Pinus ponderosa var. washoensis is the sole or dominant tree in the canopy. Pinus contorta var. murrayana, Pinus jeffreyi, Pinus ponderosa var. ponderosa, Abies magnifica, Pinus monticola, and/or Abies lowiana may be present. Trees are <25 m, and the canopy is intermittent or open. Shrubs are sparse but may include Arctostaphylos nevadensis, Arctostaphylos patula, Ceanothus velutinus, Cercocarpus ledifolius, and Artemisia tridentata. The ground layer is grassy. This association can occur on all slopes but is most extensive on upper slopes as scattered stands along approximately 150 miles of the north/south-trending mountains of northeastern California and adjacent sections of Nevada. Soils are granitic or volcanic-derived.
Diagnostic Characteristics: No Data Available
Rationale for Nominal Species or Physiognomic Features: No Data Available
Classification Comments: Pure Pinus ponderosa var. washoensis must be the dominant tree in the canopy. Abies lowiana, Abies magnifica, Pinus jeffreyi, Pinus ponderosa var. ponderosa, Pinus monticola, Pinus contorta var. murrayana and Juniperus grandis may occur. Extensive areas exist where Pinus ponderosa var. washoensis hybridizes with Pinus ponderosa var. ponderosa and Pinus jeffreyi, or where Pinus ponderosa var. washoensis is a component of other associations. It is still unclear whether stands dominated by Pinus ponderosa var. washoensis should be treated as a rare component of other alliances.
Similar NVC Types: No Data Available
note: No Data Available
Physiognomy and Structure: No Data Available
Floristics: The evergreen needle-leaved tree Pinus ponderosa var. washoensis (= Pinus washoensis) is the sole or dominant tree in the canopy. Several other conifers may be present, including Abies lowiana (= Abies concolor var. lowiana), Abies magnifica, Pinus jeffreyi, Pinus ponderosa, Pinus monticola, Pinus contorta var. murrayana, and Juniperus grandis (= Juniperus occidentalis var. australis). The height of the canopy is typically less than 25 m, and the canopy is intermittent to open. Shrub species associated with these stands are predominantly Great Basin species and are sparse. Broad-leaved deciduous shrubs include Purshia tridentata and Symphoricarpos longiflorus; broad-leaved evergreen shrubs include Arctostaphylos nevadensis, Arctostaphylos patula, Ceanothus velutinus, Cercocarpus ledifolius, and Artemisia tridentata. The herbaceous layer is dominated by perennial grasses, but species composition is not available.
Dynamics: No Data Available
Environmental Description: Stands occur from 2100-2850 m elevation in scattered localities on the western edge of the Great Basin, primarily on the eastern slope of the northern Sierra Nevada and southern Cascade Range and the Warner Mountains. The climate of this mountainous region is characterized by moderately high annual precipitation, a distinct summer dry season, and a significant proportion of the annual precipitation as snow. In the Warner Mountains, stands occur on volcanic ridges, on gentle west- and southwest-facing slopes. In the northern Sierra Nevada and southern Cascades, stands are found predominantly on upper slopes on granitic substrates. Soils are variously textured.
Geographic Range: Disjunct, scattered stands occur along approximately 150 miles of the north/south-trending mountains of northeastern California and adjacent sections of Nevada.
Nations: US
States/Provinces: CA, NV
Plot Analysis Summary:
http://vegbank.org/natureserve/ELEMENT_GLOBAL.2.686064
Confidence Level: Moderate
Confidence Level Comments: No Data Available
Grank: G1?
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.Nd Vancouverian Forest & Woodland Division | D192 | 1.B.2.Nd |
| Macrogroup | 1.B.2.Nd.2 Incense-cedar - Jeffrey Pine - Sierra White Fir Forest Macrogroup | M023 | 1.B.2.Nd.2 |
| Group | 1.B.2.Nd.2.a Incense-cedar - Sugar Pine - Sierra White Fir Forest & Woodland Group | G344 | 1.B.2.Nd.2.a |
| Alliance | A3676 Jeffrey Pine - Washoe Pine Mixed Conifer Woodland Alliance | A3676 | 1.B.2.Nd.2.a |
| Association | CEGL003078 Washoe Pine Woodland | CEGL003078 | 1.B.2.Nd.2.a |
Concept Lineage: No Data Available
Predecessors: No Data Available
Obsolete Names: No Data Available
Obsolete Parents: No Data Available
Synonomy: < Pinus washoensis (Washoe pine woodland) Alliance (Sawyer et al. 2009) [87.120.00]
= Pinus washoensis Woodland (Keeler-Wolf 1990a)
< Pinus washoensis Woodland (Griffin and Critchfield 1972)
= Pinus washoensis Woodland (Keeler-Wolf 1990a)
< Pinus washoensis Woodland (Griffin and Critchfield 1972)
- Cheatham, N. H., and J. R. Haller. 1975. An annotated list of California habitat types. Unpublished report. University of California, Natural Land and Water Reserves System.
- Griffin, J. R., and W. B. Critchfield. 1972. The distribution of forest trees in California. Research Paper PSW-82/1972. USDA Forest Service, Pacific Southwest Forest and Range Experiment Station, Berkeley, CA. 114 pp.
- Grossman, D. H., K. Lemon Goodin, and C. L. Reuss, editors. 1994. Rare plant communities of the conterminous United States: An initial survey. The Nature Conservancy. Arlington, VA. 620 pp.
- Keeler-Wolf, T. 1990a. Ecological surveys of Forest Service Research Natural Areas in California. General Technical Report PSW-125. USDA Forest Service, Pacific Southwest Research Station, Berkeley, CA. 165 pp.
- Rundel, P. W., D. J. Parsons, and D. T. Gordon. 1988. Montane and subalpine vegetation of the Sierra Nevada and Cascade Ranges. Pages 559-599 in: M. G. Barbour and J. Major, editors. Terrestrial vegetation of California: New expanded edition. California Native Plant Society, Special Publication No. 9, Sacramento. 1030 pp.
- 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.