Taxon Report
Clarkia biloba (Durand) Nels. & Macbr. ssp. brandegeeae (Jeps.) Lewis & LewisBrandegee's clarkia |
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Taxon Summary
Clarkia biloba ssp. brandegeeae, commonly known as Brandegee's clarkia, is a annual herb in the Onagraceae that is found only in California. It occurs within Chaparral, Cismontane woodland, and Lower montane coniferous forest, growing at elevations from 75 to 915 meters. Clarkia biloba ssp. brandegeeae is ranked 4.2, Plants of Limited Distribution, A Watch List; Moderately threatened in California.Classification
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Scientific Name: |
Clarkia biloba (Durand) Nels. & Macbr. ssp. brandegeeae (Jeps.) Lewis & Lewis |
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Common Name: |
Brandegee's clarkia |
| Family: | Onagraceae |
| Element Code: | PDONA05053 |
| USDA Plants Symbol: | CLBIB |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: (Mar)May-Jul | (Mar)May-Jul |
| Elevation: | 75-915 (245-3000) |
| General Habitats: | Chaparral, Cismontane woodland, Lower montane coniferous forest |
| Microhabitat: | Roadsides (often) |
| Microhabitat Details: | often roadcuts |
Conservation Status
| CA Rare Plant Rank: | 4.2 |
| Global Rank: | G4G5T4 |
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State Rank: |
S4 |
| State List: | None |
| Fed List: | None |
| Other Status: | SB_UCSC |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 89 |
| Element Occurrence Ranks: | |
| Excellent (A) | 13 |
| Good (B) | 32 |
| Fair (C) | 11 |
| Poor (D) | 3 |
| None (X) | 0 |
| Unknown (U) | 30 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Amador (AMA), Butte (BUT), El Dorado (ELD), Nevada (NEV), Placer (PLA), Sacramento (SAC), Sierra (SIE), Yuba (YUB) | |
| Quads: Name (Quad Code) | |
| Auburn (3812181), Aukum (3812056), Bangor (3912144), Camino (3812066), Camp Far West (3912113), Camptonville (3912141), Chicago Park (3912028), Clarksville (3812161), Colfax (3912018), Coloma (3812078), Dutch Flat (3912027), Fiddletown (3812057), Folsom (3812162), Forbestown (3912153), Foresthill (3912017), French Corral (3912132), Garden Valley (3812077), Gold Hill (3812182), Grass Valley (3912121), Greenwood (3812088), Lake Combie (3912111), Latrobe (3812058), Michigan Bluff (3912016), Nevada City (3912131), North Bloomfield (3912038), Oregon House (3912133), Oroville (3912155), Oroville Dam (3912154), Pike (3912048), Pilot Hill (3812171), Placerville (3812067), Rackerby (3912143), Rocklin (3812172), Rough And Ready (3912122), Shingle Springs (3812068), Slate Mtn. (3812076), Smartville (3912123), Wolf (3912112) | |
Threat List Data from the CNDDB
| Threat List Total: | 14 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 38 | 43 % | |
| Road/trail construction/maint. | 20 | 22% |
| Biocides | 9 | 10% |
| Non-native plant impacts | 9 | 10% |
| Recreational use (non-ORV) | 7 | 7% |
| Other | 6 | 6% |
| Development | 6 | 6% |
| Erosion/runoff | 6 | 6% |
| ORV activity | 4 | 4% |
| Grazing | 2 | 2% |
| Logging | 1 | 1% |
| Feral pigs | 1 | 1% |
| Dam/Inundation | 1 | 1% |
| Over-collecting/poaching | 1 | 1% |
| Vandalism/dumping/litter | 1 | 1% |
Notes
| Previously CRPR 1B.2; more common than originally known. Threatened by weed control measures, non-native plants, road maintenance, fire suppression, and development. See University of California Publications in Botany 2:334 (1907) for original description and 20(4):323 (1955) for revised nomenclature. |
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Threats: |
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Taxonomy: |
Selected References
| CRPR List Change on 2009-04-30 |
| CRPR List Change on 2012-10-29 |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].