Taxon Report
Downingia concolor Greene var. brevior McVaughCuyamaca Lake downingia |
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Taxon Summary
Downingia concolor var. brevior, commonly known as Cuyamaca Lake downingia, is a annual herb in the Campanulaceae that is found only in California. It occurs within Meadows and seeps (vernally mesic), and Vernal pools, growing at elevations from 1380 to 1500 meters. Downingia concolor var. brevior is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Downingia concolor Greene var. brevior McVaugh |
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Common Name: |
Cuyamaca Lake downingia |
| Family: | Campanulaceae |
| Element Code: | PDCAM06041 |
| USDA Plants Symbol: | DOCOB |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: May-Jul | May-Jul |
| Elevation: | 1380-1500 (4530-4920) |
| General Habitats: | Meadows and seeps, Vernal pools |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G4T1 |
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State Rank: |
S1 |
| State List: | CE |
| Fed List: | None |
| Other Status: | SB_CRES |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 4 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 2 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 1 |
| Unknown (U) | 1 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| San Diego (SDG) | |
| Quads: Name (Quad Code) | |
| Cuyamaca Peak (3211685), Julian (3311615), Warners Ranch (3311626) | |
Threat List Data from the CNDDB
| Threat List Total: | 12 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 3 | 75 % | |
| Altered flood/tidal/hydrologic regime | 2 | 50% |
| Development | 2 | 50% |
| Recreational use (non-ORV) | 2 | 50% |
| Road/trail construction/maint. | 2 | 50% |
| Foot traffic/trampling | 2 | 50% |
| Grazing | 2 | 50% |
| ORV activity | 1 | 25% |
| Surface water diversion | 1 | 25% |
| Vandalism/dumping/litter | 1 | 25% |
| Erosion/runoff | 1 | 25% |
| Biocides | 1 | 25% |
| Dam/Inundation | 1 | 25% |
Notes
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Known from fewer than 5 occurrences in the Cuyamaca Lake area. Threatened by development, altered hydrology, grazing, and recreation. Habitat restoration and seed introduction occurred in 1994; conservation activities occurring as of 1997. See Memoirs of the Torrey Botanical Club |
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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 25 October 2025].