Taxon Report
Clarkia rostrata W.S. Davisbeaked clarkia |
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Taxon Summary
Clarkia rostrata, commonly known as beaked clarkia, is a annual herb in the Onagraceae that is found only in California. It occurs within Cismontane woodland, and Valley and foothill grassland, growing at elevations from 60 to 500 meters. Clarkia rostrata 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: |
Clarkia rostrata W.S. Davis |
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Common Name: |
beaked clarkia |
| Family: | Onagraceae |
| Element Code: | PDONA050Y0 |
| USDA Plants Symbol: | CLRO2 |
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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: | 60-500 (195-1640) |
| General Habitats: | Cismontane woodland, Valley and foothill grassland |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.3 |
| Global Rank: | G2G3 |
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State Rank: |
S2S3 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_CalBG/RSABG; SB_UCBG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 74 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 10 |
| Fair (C) | 2 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 61 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Calaveras (CAL), Madera (MAD), Mariposa (MPA), Merced (MER), Stanislaus (STA), Tuolumne (TUO) | |
| Quads: Name (Quad Code) | |
| Bear Valley (3712051), Ben Hur (3711938), Cooperstown (3712065), Coulterville (3712062), Haystack Mtn. (3712043), Hornitos (3712052), Indian Gulch (3712042), Knights Ferry (3712076), Mariposa (3711948), Merced Falls (3712053), New Melones Dam (3712085), Owens Reservoir (3712032), Penon Blanco Peak (3712063), Raymond (3711928), Snelling (3712054), Stumpfield Mtn. (3711947), Waterford (3712067), Yosemite Lake (3712044) | |
Threat List Data from the CNDDB
| Threat List Total: | 12 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 50 | 68 % | |
| Non-native plant impacts | 34 | 45% |
| Grazing | 31 | 41% |
| Altered flood/tidal/hydrologic regime | 20 | 27% |
| Erosion/runoff | 14 | 18% |
| Road/trail construction/maint. | 12 | 16% |
| Mining | 5 | 6% |
| Foot traffic/trampling | 4 | 5% |
| Biocides | 4 | 5% |
| Recreational use (non-ORV) | 4 | 5% |
| Development | 3 | 4% |
| Other | 2 | 2% |
| Dam/Inundation | 1 | 1% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 9 February 2025].