The following Participating Institutions are custodians for this species in the CPC National Collection:
University of California Botanical Garden
The conservation of Delphinium luteum is partially sponsored.
Holly Forbes contributed to this Plant Profile.
The picturesque coast of California north of San Francisco is the only home for the yellow larkspur. Now found in only two locations, both on private land, it was probably never widely distributed, occurring on rocky areas within coastal scrub at elevations up to 100 meters. Loss of habitat due to quarrying, livestock grazing, development, and overcollecting reduced its numbers to these two occurrences.
Distribution & Occurrence
Yellow Larkspur grows in rocky areas within coastal scrub plant communities, including areas with active rock slides, from sea level to 100 m. in elevation. (USFWS 2002)
|The two remaining populations total fewer than 80 plants. These numbers fluctuate from year to year. Two ex situ populations are in cultivation in Sonoma County and at the University of California Botanical Garden at Berkeley. (USFWS 2002)|
Conservation, Ecology & Research
Pollination is by hummingbirds.
Yellow larkspur is self-compatible, but requires visitation by hummingbirds or insects for good seed set.
rock quarrying activities
deer and sheep grazing
Forbes, H. 2002. Cultivating Partnerships for the Yellow Larkspur. Endangered Species Bulletin. 27, 3: 22-23.
Koontz, J.A.; Soltis, P.S.; Brunsfeld, S.J. 2001. Genetic diversity and tests of the hybrid origin of the endangered yellow larkspur. Conservation Biology. 15: 1608-1618.
Ornduff, R.; Forbes, H. 1997. Research and the Botanical Garden. University of California Botanical Garden Newsletter. 22, 3: 6-7.
USFWS. 1997. Proposed endangered status for two larkspurs from coastal northern California. Federal Register. 62, 118: 33383-33387.
USFWS. 1998. Determination of endangered status for two larkspurs from coastal northern California. Federal Register. 65, 17: 4156-4162.
USFWS. 2002. Critical Habitat Designation for Two Larkspurs From Coastal Northern California. Federal Register. 67, 117: 41367-41392.
Warnock, M.J. 1990. Taxonomic and Ecological Review of California Delphinium. Collectanea Botanica. 19: 45-74.