Taxon Report
Caulanthus californicus (Wats.) Pays.California jewelflower |
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Classification
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Scientific Name: |
Caulanthus californicus (Wats.) Pays. |
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Common Name: |
California jewelflower |
| Family: | Brassicaceae |
| Element Code: | PDBRA31010 |
| USDA Plants Symbol: | |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: Feb-May | Feb-May |
| Elevation: | 61-1000 (200-3280) |
| General Habitats: | Chenopod scrub, Pinyon and juniper woodland, Valley and foothill grassland |
| Microhabitat: | Sandy |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1 |
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State Rank: |
S1 |
| State List: | CE |
| Fed List: | FE |
| Other Status: | SB_CalBG/RSABG; SB_SBBG; SB_UCBG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 67 |
| Element Occurrence Ranks: | |
| Excellent (A) | 8 |
| Good (B) | 22 |
| Fair (C) | 3 |
| Poor (D) | 2 |
| None (X) | 30 |
| Unknown (U) | 2 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Fresno (FRE), Kern (KRN), Kings (KNG)*, San Luis Obispo (SLO), Santa Barbara (SBA), Tulare (TUL)* | |
| Quads: Name (Quad Code) | |
| Antelope Plain (3511967), Arvin (3511827)*, Avenal (3612012)*, Ballinger Canyon (3411984)*, Belridge (3511946)*, Clovis (3611976), Coalinga (3612023)*, Curry Mountain (3612014)*, Cuyama (3411985), Cuyama Peak (3411974)*, Delano East (3511972)*, Delano West (3511973)*, Edison (3511837)*, Elkhorn Hills (3511915), Emigrant Hill (3511968)*, Fox Mountain (3411975), Fresno North (3611977)?*, Fresno South (3611967), Garza Peak (3512082)*, Huron (3612021)*, Kreyenhagen Hills (3612013), La Panza (3512032), La Panza Ranch (3512042), Lost Hills (3511956)*, Lost Hills NE (3511965), Malaga (3611966), Mouth of Kern (3511923), New Cuyama (3411986)*, Painted Rock (3511927)*, Pine Mountain (3511857)*, Pyramid Hills (3512071)*, Richgrove (3511971)*, Rio Bravo Ranch (3511847)*, Rosedale (3511942)*, Sausalito School (3511982)*, Semitropic (3511955), Stevens (3511932), Taft (3511924)*, Tejon Ranch (3511816), Tent Hills (3512072), Tulare (3611923)*, Wells Ranch (3511916) | |
Threat List Data from the CNDDB
| Threat List Total: | 7 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 52 | 78 % | |
| Agriculture | 26 | 38% |
| Grazing | 24 | 35% |
| Development | 11 | 16% |
| Other | 6 | 8% |
| Non-native plant impacts | 3 | 4% |
| Mining | 2 | 2% |
| Insufficient population/stand size | 1 | 1% |
Notes
| Over 35 historical occurrences extirpated; new populations recently discovered. Threatened by agriculture, urbanization, energy development, and grazing, and possibly by non-native plants. Experimental reintroductions have occurred in KRN, SBA, and TUL counties, but all have failed. See Fremontia 16(1):18-19 (1988) for species account. |
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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 6 January 2025].