Invalid Unit Specified
G563 Pinus contorta var. murrayana / Ceanothus megacarpus - Cercocarpus montanus var. minutiflorus Cliff, Scree & Rock Vegetation Group

The U.S. National
Vegetation Classification
Type Concept Sentence: This cliff, scree and rock vegetation is scattered across California's Coast, Transverse, and Peninsular ranges, Klamath Mountains, southern Sierra Nevada, and the northern coast of Baja California.
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Common (Translated Scientific) Name: Sierra Lodgepole Pine / Bigpod Ceanothus - Smooth Mountain-mahogany Cliff, Scree & Rock Vegetation Group
Colloquial Name: Californian Cliff, Scree & Rock Vegetation
Hierarchy Level: Group
Type Concept: This group is scattered across California's Coast, Transverse, and Peninsular ranges, Klamath Mountains, southern Sierra Nevada, and the northern coast of Baja California. Sites include barren and sparsely vegetated areas of steep cliff faces, narrow canyons, smaller rock outcrops of various igneous, sedimentary, serpentinite, and metamorphic bedrock. This group also includes unstable scree and talus slopes typically occurring below cliff faces. Scattered vegetation may include trees such as Pseudotsuga menziesii, Pinus contorta var. murrayana, Pinus ponderosa, and Pinus jeffreyi. Shrubs may include Ceanothus megacarpus, Ceanothus leucodermis, Cercocarpus montanus var. glaber, Cercocarpus montanus var. minutiflorus, Arctostaphylos glauca, and Xylococcus bicolor. Soil development is limited as is herbaceous cover, but may include Allium falcifolium, Allium cratericola, Streptanthus spp., Hesperolinon spp., Asclepias solanoana, Eriogonum ursinum, Eriogonum nudum, Eriogonum luteolum, Erigeron spp., Dudleya cymosa, Dudleya lanceolata, Lewisia rediviva, Pentagramma triangularis, Selaginella bigelovii, Bromus rubens, Vulpia spp., and others. Moss and lichen can be well-developed, and needs better characterization.
Diagnostic Characteristics: This is a sparsely vegetated and barren group characterized by patchy vegetation that does not exceed 10% total cover. Species occupying these sites may be opportunistic and/or adapted to such conditions. Woody species may include Pseudotsuga menziesii, Pinus contorta var. murrayana, Pinus ponderosa, Pinus jeffreyi, Ceanothus megacarpus, Ceanothus leucodermis, Cercocarpus montanus var. minutiflorus, Arctostaphylos glauca, and Xylococcus bicolor. Soil development is limited as is herbaceous cover, but may include Allium falcifolium, Allium cratericola, Streptanthus spp., Hesperolinon spp., Asclepias solanoana, Eriogonum ursinum, Eriogonum nudum, Eriogonum luteolum, Erigeron spp., Dudleya cymosa, Dudleya lanceolata, Lewisia rediviva, Pentagramma triangularis, Selaginella bigelovii, Bromus rubens, Vulpia spp., and others. Moss and lichen can be well-developed.
Rationale for Nominal Species or Physiognomic Features: Nominal species reflect regional phenotypic expression and environmental stresses.
Classification Comments: This type may overlap with Western North American Cliff, Scree & Rock Vegetation Macrogroup (M887), especially Southern Vancouverian Cliff, Scree & Rock Vegetation Group (G573). Further review is needed.
Similar NVC Types:
G573 Southern Vancouverian Cliff, Scree & Rock Vegetation, note:
Physiognomy and Structure: Vegetation of the group is variable in physiognomy and structure due to harsh substrate conditions and exposure, but is composed of a patchy assemblage of needleleaf trees, broadleaf deciduous shrubs, and sporadic herbaceous cover.
Floristics: Scattered vegetation may include trees such as Pseudotsuga menziesii, Pinus contorta var. murrayana, Pinus ponderosa, and Pinus jeffreyi. Shrubs may include Ceanothus megacarpus, Ceanothus leucodermis, Cercocarpus montanus var. glaber (= Cercocarpus betuloides), Cercocarpus montanus var. minutiflorus (= Cercocarpus minutiflorus), Arctostaphylos glauca, and Xylococcus bicolor. Herbaceous cover is limited but may include Streptanthus spp., Hesperolinon spp., Allium falcifolium, Allium cratericola, Asclepias solanoana, Eriogonum ursinum, Eriogonum nudum, Eriogonum luteolum, Erigeron spp., Dudleya cymosa, Dudleya lanceolata, Lewisia rediviva, Pentagramma triangularis, Selaginella bigelovii, Bromus rubens, Vulpia spp., and others. Moss and lichen can be well-developed, and needs better characterization.
Dynamics: Poor, rocky, loosely consolidated soils help maintain stands of this group by limiting the establishment of species from adjacent communities. Not all serpentinite outcrops support distinct vegetation. Only those with very low Ca:Mg ratio impact biotic composition.
Environmental Description: This group is known from California's Coast, Transverse, and Peninsular ranges, Klamath Mountains, southern Sierra Nevada, and the northern coast of Baja California. Sites include barren and sparsely vegetated areas of steep cliff faces, narrow canyons, smaller rock outcrops of various igneous, sedimentary, serpentinite, and metamorphic bedrock. This group also includes unstable scree and talus slopes typically occurring below cliff faces. Soil/substrate/hydrology: Soils are poorly developed, rocky, and loosely consolidated. Parent materials include igneous, sedimentary, serpentinite, and metamorphic bedrock and scree.
Geographic Range: This group is known from California's Coast, Transverse, and Peninsular ranges, Klamath Mountains, southern Sierra Nevada, and the northern coast of Baja California.
Nations: MX, US
States/Provinces: CA, MXBC
US Forest Service Ecoregions (2007)
Domain Name:
Division Name:
Province Name: Sierran Steppe - Mixed Forest - Coniferous Forest - Alpine Meadow Province
Province Code: M261    Occurrence Status: Confident or certain
Section Name: Southern Cascades Section
Section Code: M261D     Occurrence Status: Confident or certain
Omernik Ecoregions: 1:P, 1i:P, 1j:P, 1k:P, 1m:P, 1n:P, 6:P, 6f:P, 6g:P, 6h:P, 6i:P, 6j:P, 6k:P, 6l:P, 6m:P, 6n:P, 6o:P, 6p:P, 6q:P, 6r:P, 6s:P, 6t:P, 6u:P, 6v:P, 6w:P, 6x:P, 6y:P, 6z:P, 6aa:P, 6ab:P, 6ac:P, 6ad:P, 6af:P, 6ag:P, 6ai:P, 6aj:P, 6ak:P, 6al:P, 6am:P, 6an:P, 6ao:P, 6ap:P, 6aq:P, 6ar:P, 7:P, 7g:P, 7j:P, 7o:P, 7q:P, 7t:P, 7u:P, 7v:P, 8:P, 8a:P, 8b:P, 8c:P, 8d:P, 8e:P, 8f:P, 8g:P, 14:P, 14b:P, 78:P, 78i:P, 78k:P, 78l:P, 78q:P, 78r:P, 81:P, 81a:P, 81b:P, 81c:P, 81e:P, 85:P, 85c:P, 85e:P, 85f:P, 85g:P, 85k:P, 85l:P, 85m:P
Plot Analysis Summary:
Confidence Level: Moderate
Confidence Level Comments:
Grank: GNR
Greasons:
Concept Lineage:
Predecessors:
Obsolete Names:
Obsolete Parents:
Synonomy:
Concept Author(s): P. Comer and T. Keeler-Wolf, in Faber-Langendoen et al. (2011)
Author of Description: M.E. Hall and J. Evens
Acknowledgements: J. Evens
Version Date: 08Oct2014
References:
  • Barbour, M. G., and J. Major, editors. 1988. Terrestrial vegetation of California: New expanded edition. California Native Plant Society, Special Publication 9, Sacramento. 1030 pp.
  • Comer, P., D. Faber-Langendoen, R. Evans, S. Gawler, C. Josse, G. Kittel, S. Menard, C. Nordman, M. Pyne, M. Reid, M. Russo, K. Schulz, K. Snow, J. Teague, and R. White. 2003-present. Ecological systems of the United States: A working classification of U.S. terrestrial systems. NatureServe, Arlington, VA.
  • Faber-Langendoen, D., J. Drake, S. Gawler, M. Hall, C. Josse, G. Kittel, S. Menard, C. Nordman, M. Pyne, M. Reid, L. Sneddon, K. Schulz, J. Teague, M. Russo, K. Snow, and P. Comer, editors. 2010-2019a. Divisions, Macrogroups and Groups for the Revised U.S. National Vegetation Classification. NatureServe, Arlington, VA. plus appendices. [in preparation]
  • Holland, V. L., and D. J. Keil. 1995. California vegetation. Kendall/Hunt Publishing Company, Dubuque, IA. 516 pp.
  • Kittel, G., E. Reyes, J. Evens, J. Buck, and D. Johnson. 2012a. Vegetation classification and mapping project report, Pinnacles National Monument. Natural Resource Report NPS/SFAN/NRR-2012/574. National Park Service, Fort Collins, CO. 428 pp.
  • Rodriguez, D., K. G. Sikes, T. Keeler-Wolf, G. Kittel, J. Curtis, C. Curley, and J. Evens. 2017. Vegetation classification of Channel Islands National Park. Report to the National Park Service, Fort Collins, CO.
  • Sawyer, J. O., and T. Keeler-Wolf. 1995. A manual of California vegetation. California Native Plant Society, Sacramento. 471 pp.