Taxon Report
Camissonia integrifolia RavenKern River evening-primrose |
 © 2015 John Game |
Taxon Summary
Camissonia integrifolia, commonly known as Kern River evening-primrose, is a annual herb in the Onagraceae that is found only in California. It occurs within Chaparral, and Mojavean desert scrub, growing at elevations from 700 to 1200 meters. Camissonia integrifolia is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.Classification
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Scientific Name: |
Camissonia integrifolia Raven |
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Common Name: |
Kern River evening-primrose |
| Family: | Onagraceae |
| Element Code: | PDONA030T0 |
| USDA Plants Symbol: | CAIN22 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: (Apr)May | (Apr)May |
| Elevation: | 700-1200 (2295-3935) |
| General Habitats: | Chaparral, Mojavean desert scrub |
| Microhabitat: | Openings, Sandy |
| Microhabitat Details: | Toeslopes and terraces along drainages |
Conservation Status
| CA Rare Plant Rank: | 1B.3 |
| Global Rank: | G2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S |
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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) | 1 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 5 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Kern (KRN) | |
| Quads: Name (Quad Code) | |
| Cane Canyon (3511852), Horse Canyon (3511851), Miracle Hot Springs (3511855), Onyx (3511862), Weldon (3511863), Woolstalf Creek (3511853) | |
Threat List Data from the CNDDB
| Threat List Total: | 2 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 2 | 33 % | |
| Foot traffic/trampling | 1 | 16% |
| Road/trail construction/maint. | 1 | 16% |
Selected References
| Contributions from the U.S. National Herbarium 37(5): 344 (1969) |
| Fremontia 43(3): 24-25 (2015) [notes on rediscovery] |
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 November 2025].