Taxon Report
Delphinium bakeri EwanBaker's larkspur |
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Taxon Summary
Delphinium bakeri, commonly known as Baker's larkspur, is a perennial herb in the Ranunculaceae that is found only in California. It occurs within Broadleafed upland forest, Coastal scrub, and Valley and foothill grassland, growing at elevations from 80 to 305 meters. Delphinium bakeri is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Delphinium bakeri Ewan |
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Common Name: |
Baker's larkspur |
| Family: | Ranunculaceae |
| Element Code: | PDRAN0B050 |
| USDA Plants Symbol: | DEBA |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Mar-May | Mar-May |
| Elevation: | 80-305 (260-1000) |
| General Habitats: | Broadleafed upland forest, Coastal scrub, Valley and foothill grassland |
| Microhabitat: | Mesic (often), Shale |
| Microhabitat Details: | decomposed shale |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1 |
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State Rank: |
S1 |
| State List: | CE |
| Fed List: | FE |
| Other Status: | SB_UCBG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 6 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 0 |
| Fair (C) | 0 |
| Poor (D) | 1 |
| None (X) | 1 |
| Unknown (U) | 4 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Marin (MRN), Sonoma (SON)* | |
| Quads: Name (Quad Code) | |
| Camp Meeker (3812248)*, Duncans Mills (3812341), Petaluma (3812226)*, Point Reyes NE (3812227), Tomales (3812228)*, Valley Ford (3812238) | |
Threat List Data from the CNDDB
| Threat List Total: | 8 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 5 | 83 % | |
| Other | 4 | 66% |
| Over-collecting/poaching | 1 | 16% |
| Road/trail construction/maint. | 1 | 16% |
| Wood cutting or brush clearing | 1 | 16% |
| Agriculture | 1 | 16% |
| Biocides | 1 | 16% |
| Grazing | 1 | 16% |
| Non-native plant impacts | 1 | 16% |
Notes
| Known from only one extant occurrence along Salmon Creek. Nearly extinct; as of July 2011, seven plants remain. Other historic occurrences extirpated by agricultural conversion, road maintenance, and grazing. Threatened by road maintenance, grazing, and horticultural collecting. See Bulletin of the Torrey Botanical Club 69:144 (1942) for original description. |
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Threats: |
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Taxonomy: |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 4 March 2025].