Taxon Report
Streptanthus albidus Greene ssp. albidusMetcalf Canyon jewelflower |
 © 2015 Aaron Schusteff |
Taxon Summary
Streptanthus albidus ssp. albidus, commonly known as Metcalf Canyon jewelflower, is a annual herb in the Brassicaceae that is found only in California. It occurs within Valley and foothill grassland, growing at elevations from 45 to 800 meters. Streptanthus albidus ssp. albidus is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Streptanthus albidus Greene ssp. albidus |
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Common Name: |
Metcalf Canyon jewelflower |
| Family: | Brassicaceae |
| Element Code: | PDBRA2G011 |
| USDA Plants Symbol: | STALA |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: Apr-Jul | Apr-Jul |
| Elevation: | 45-800 (150-2625) |
| General Habitats: | Valley and foothill grassland |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G2T1 |
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State Rank: |
S1 |
| State List: | None |
| Fed List: | FE |
| Other Status: | SB_CalBG/RSABG; SB_UCBG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 13 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 7 |
| Fair (C) | 2 |
| Poor (D) | 2 |
| None (X) | 1 |
| Unknown (U) | 1 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Santa Clara (SCL) | |
| Quads: Name (Quad Code) | |
| Lick Observatory (3712136), Morgan Hill (3712126), San Jose East (3712137), Santa Teresa Hills (3712127)* | |
Threat List Data from the CNDDB
| Threat List Total: | 10 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 13 | 100 % | |
| Non-native plant impacts | 11 | 84% |
| Development | 6 | 46% |
| Grazing | 6 | 46% |
| Road/trail construction/maint. | 6 | 46% |
| Other | 2 | 15% |
| Biocides | 1 | 7% |
| ORV activity | 1 | 7% |
| Mining | 1 | 7% |
| Foot traffic/trampling | 1 | 7% |
| Vandalism/dumping/litter | 1 | 7% |
Notes
| Threatened by residential development, road construction, vehicles, and non-native plants. A synonym of S. glandulosus ssp. albidus in TJM 2; further study is underway to determine its relationship to the S. glandulosus complex. See Pittonia 1:62 (1887) for original description, Madroño 14(7):217-227 (1958) for taxonomic treatment, and Systematic Botany 19(4):557-574 (1994) for discussion of S. glandulosus complex. |
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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 28 October 2025].