Taxon Report
Streptanthus albidus Greene ssp. peramoenus (Greene) Kruckebergmost beautiful jewelflower |
 © 1994 Robert E. Preston, Ph.D. |
Species Description:
Streptanthus albidus ssp. peramoenus, commonly known as most beautiful jewelflower, is a annual herb in the Brassicaceae that is found only in California. It occurs within Chaparral, Cismontane woodland, and Valley and foothill grassland, growing at elevations from 95 to 1000 meters. Streptanthus albidus ssp. peramoenus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.
Classification
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Scientific Name: |
Streptanthus albidus Greene ssp. peramoenus (Greene) Kruckeberg |
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Common Name: |
most beautiful jewelflower |
| Family: | Brassicaceae |
| Element Code: | PDBRA2G012 |
| USDA Plants Symbol: | STALP |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: (Mar)Apr-Sep(Oct) | (Mar)Apr-Sep(Oct) |
| Elevation: | 95-1000 (310-3280) |
| General Habitats: | Chaparral, Cismontane woodland, Valley and foothill grassland |
| Microhabitat: | Serpentine |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G2T2 |
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State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_CalBG/RSABG; SB_UCBG; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 103 |
| Element Occurrence Ranks: | |
| Excellent (A) | 11 |
| Good (B) | 37 |
| Fair (C) | 6 |
| Poor (D) | 3 |
| None (X) | 0 |
| Unknown (U) | 46 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Alameda (ALA), Contra Costa (CCA), Monterey (MNT), San Luis Obispo (SLO), Santa Clara (SCL) | |
| Quads: Name (Quad Code) | |
| Alder Peak (3512183), Atascadero (3512046), Burnett Peak (3512172), Burro Mountain (3512173), Calaveras Reservoir (3712147), Cambria (3512151)?, Cape San Martin (3512184), Chittenden (3612185), Clayton (3712188), Cone Peak (3612114), Cypress Mountain (3512058)?, Gilroy (3712115), Hayward (3712261), La Costa Valley (3712157), Las Trampas Ridge (3712271), Lopez Mtn. (3512035), Lopez Point (3612115), Los Gatos (3712128), Morgan Hill (3712126), Morro Bay North (3512047), Morro Bay South (3512037)?, Mt. Madonna (3712116), Mt. Sizer (3712125), Niles (3712158), Oakland East (3712272), Pebblestone Shut-in (3512161), Piedras Blancas (3512163)?, Port San Luis (3512027), San Leandro (3712262), San Luis Obispo (3512036), San Simeon (3512162), Santa Margarita Lake (3512034), Santa Teresa Hills (3712127) | |
Threat List Data from the CNDDB
| Threat List Total: | 18 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 53 | 51 % | |
| Non-native plant impacts | 27 | 26% |
| Grazing | 14 | 13% |
| Development | 13 | 12% |
| Road/trail construction/maint. | 12 | 11% |
| Foot traffic/trampling | 6 | 5% |
| Recreational use (non-ORV) | 5 | 4% |
| Erosion/runoff | 5 | 4% |
| Feral pigs | 4 | 3% |
| Improper burning regime | 4 | 3% |
| Other | 3 | 2% |
| Military operations | 2 | 1% |
| Mining | 1 | 0% |
| Insufficient population/stand size | 1 | 0% |
| Landfill | 1 | 0% |
| Over-collecting/poaching | 1 | 0% |
| ORV activity | 1 | 0% |
| Vandalism/dumping/litter | 1 | 0% |
| Waterway bank protection/maintenance | 1 | 0% |
Notes
| Historical occurrences need field surveys. Threatened by development, non-native plants, and grazing. Possibly threatened by dam maintenance, road construction and maintenance, and recreational activities. Similar plants from MNT and SLO counties may be S. glandulosus ssp. glandulosus; see this name in TJM 2; further study is underway to determine its relationship to the S. glandulosus complex. See Bulletin of the Torrey Botanical Club 13(1):142 (1886) for original description, and Madroño 14(7):217-227 (1958) for taxonomic treatment. |
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Threats: |
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Taxonomy: |
Selected References
| CRPR List Change on 2012-05-09 |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 15 January 2025].