CPC National Collection Plant Profile

Delphinium hesperium ssp. cuyamacae

Photographer:
Walter Wisura

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CPC National Collection Plant Profile

Delphinium hesperium ssp. cuyamacae


Family: 
Ranunculaceae  
Common Name: 
Cuyamaca larkspur
Author: 
(Abrams) Lewis & Epling
Growth Habit: 
Forb/herb
CPC Number: 
1377

Distribution
Protection
Conservation
References


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Delphinium hesperium ssp. cuyamacaeenlarge
Photographer: Walter Wisura
Image Owner: Rancho Santa Ana

Delphinium hesperium ssp. cuyamacaeenlarge
Photographer: Walter Wisura
Image Owner: Rancho Santa Ana


Delphinium hesperium ssp. cuyamacae is Not Sponsored
Primary custodian for this plant in the CPC National Collection of Endangered Plants is: 

 
Delphinium hesperium ssp. cuyamacae


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

State Range
  California
State Range of  Delphinium hesperium ssp. cuyamacae
Habitat
  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
  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
  Twenty occurrences are known, seventy percent of which are found within Cuyamaca Rancho State Park. (CDFG 2002)

Protection

Global Rank:  
G4T2
 
10/30/1997
Guide to Global Ranks
Federal Status:  
SC
 
1/19/1996
Guide to Federal Status
Recovery Plan:  
No
 

State/Area Protection
  State/Area Rank Status Date  
  California S2.1 3  

Conservation, Ecology & Research

Ecological Relationships
  Unknown.

Threats
  Cattle grazing
Highway maintenance activities
Recreational and trail development
(CDFG 2002)

Current Research Summary
  None known.

Current Management Summary
  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
  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
  Maintain a genetically representative seed bank.

References

Books (Single Authors)

Reiser, C.H. 1994. Rare Plants of San Diego County. Imperial Beach, CA: Aquafir Press.

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.

Books (Sections)

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.

Electronic Sources

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.

Journal Articles

1905. Original description. Bulletin of the Torrey Botanical Club. 32: 538.

Reports

KEA Environmental, Inc. 2001. Biological Resources Technical Report for the Valley Rainbow Interconnect. San Diego, CA: San Diego Gas & Electric Company.

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.


  This profile was updated on 8/9/2011
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