CPC National Collection Plant Profile
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Delphinium hesperium ssp. cuyamacae
Family: |
Ranunculaceae |
Common Name: |
Cuyamaca larkspur |
Author: |
(Abrams) Lewis & Epling |
Growth Habit: |
Forb/herb |
CPC
Number: |
1377 |
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Primary
custodian for this plant in the CPC National Collection of Endangered
Plants is: |
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Delphinium hesperium ssp. cuyamacae
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The Cuyamaca larkspur is an herbaceous perennial in the buttercup family, and has leafy stems that bear dense blue-violet blooms. This species is found in two counties in California, and appears to be stable in the wild, due in large part to the establishment of the Cuyamaca Meadows Natural Preserve in 1990 by the California Department of Parks and Recreation. The creation of this preserve not only protected the Cuyamaca larkspur, but also its habitat, which is shared with a number of other endangered plant species, including the endangered Cuyamaca Lake downingia (Downingia concolor var. brevior), another species in the Center for Plant Conservation's National Collection. Further protection for this habitat comes from a Memorandum of Understanding (MOU) between the U.S. Fish and Wildlife Service, Helix Water District, Lake Cuyamaca Recreation and Park district, the California Department of Parks and Recreation, and the U.S. Forest Service. This MOU identifies particular actions for each of the signatory land managers to preserve and protect the endangered species and the habitat they depend upon. (CDFG 2002)
Distribution
& Occurrence |
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State Range
Habitat
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Relatively densely vegetated Montane Meadow with a dominant presence of Muhlenbergia rigens is the habitat utilized by the Cuyamaca Larkspur south of Cuyamaca Lake. This locale is considerably more mesic than the habitat typically occupied by any other larkspurs in the region. The soils here are mapped as Holland stony fine sandy loam. (Reiser 1994) |
Distribution
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Found from the San Jacinto Mountains (Riverside County), south into eastern San Diego County, where known locations include Cuyamaca Lake, Laguna Mountain Recreational Area, and Palomar Mountain. (KEA Environmental Inc. 2001) |
Number Left
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Twenty occurrences are known, seventy percent of which are found within Cuyamaca Rancho State Park. (CDFG 2002) |
State/Area
Protection
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State/Area |
Rank |
Status |
Date |
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California |
S2.1 |
3 |
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Conservation,
Ecology & Research |
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Ecological
Relationships
Threats
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• Cattle grazing
• Highway maintenance activities
• Recreational and trail development
(CDFG 2002) |
Current Research Summary
Current Management Summary
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Cuyamaca Meadows Natural Preserve was established in 1990 by the California Department of Parks and Recreation to protect this and other endangered species in the area. Further protection for this habitat comes from a Memorandum of Understanding (MOU) between the U.S. Fish and Wildlife Service, Helix Water District, Lake Cuyamaca Recreation and Park district, the California Department of Parks and Recreation, and the U.S. Forest Service, which calls for signatory land managers to preserve and protect the endangered species and the habitat they depend upon. (CDFG 2002) |
Research Management Needs
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• The permanent removal of cattle grazing from Cuyamaca Lake.
• Studies into the basic biology and ecology of this species would benefit efforts to conserve it. |
Ex Situ Needs
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• Maintain a genetically representative seed bank. |
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Books (Single Authors)
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Reiser, C.H. 1994. Rare Plants of San Diego County. Imperial Beach, CA: Aquafir Press.
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Skinner, M.W.; Pavlik, B.M. 1997. Inventory of rare and endangered vascular plants of California: Electronic Inventory Update of 1994, 5th edition. Sacramento: California Native Plant Society.
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Books (Sections)
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Kartesz, J.T. 1999. A synonymized checklist of the vascular flora of the U.S., Canada, and Greenland. In: Kartesz, J.T.; Meacham, C.A., editors. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden. Chapel Hill, NC.
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Electronic Sources
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CDFG. (2002). California's Plants and Animals, Threatened and Endangered Plants. List and Species Accounts. California Department of Fish and Game, Habitat Conservation Planning Branch. http://www.dfg.ca.gov/hcpb/species/t_e_spp/teplant/teplanta.shtml. Accessed: 2002.
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Journal Articles
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1905. Original description. Bulletin of the Torrey Botanical Club. 32: 538.
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Reports
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KEA Environmental, Inc. 2001. Biological Resources Technical Report for the Valley Rainbow Interconnect. San Diego, CA: San Diego Gas & Electric Company.
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Sanguamphai. 1989. 1988 Annual Report on the Status of California's State Listed Threatened and Endangered Plants and Animals. State of California, Department of Fish and Game.
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This
profile was updated on 8/9/2011 |
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