Taxon Report
Delphinium variegatum T. & G. ssp. thornei MunzThorne's royal larkspur |
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Taxon Summary
Delphinium variegatum ssp. thornei, commonly known as Thorne's royal larkspur, is a perennial herb in the Ranunculaceae that is found only in California. It occurs within Cismontane woodland, and Valley and foothill grassland (coastal), growing at elevations from 250 to 575 meters. Delphinium variegatum ssp. thornei 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 variegatum T. & G. ssp. thornei Munz |
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Common Name: |
Thorne's royal larkspur |
| Family: | Ranunculaceae |
| Element Code: | PDRAN0B1X2 |
| USDA Plants Symbol: | DEVAT |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: (Mar)Apr-May | (Mar)Apr-May |
| Elevation: | 250-575 (820-1885) |
| General Habitats: | Cismontane woodland, Valley and foothill grassland |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G4T1 |
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State Rank: |
S1S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 15 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 0 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 15 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Los Angeles (LAX) | |
| Quads: Name (Quad Code) | |
| San Clemente Island Central (3211874), San Clemente Island South (3211873) | |
Threat List Data from the CNDDB
| Threat List Total: | 1 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 1 | 7 % | |
| Erosion/runoff | 1 | 6% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 14 December 2025].