Taxon Report
Blennosperma bakeri HeiserSonoma sunshine |
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Taxon Summary
Blennosperma bakeri, commonly known as Sonoma sunshine, is a annual herb in the Asteraceae that is found only in California. It occurs within Valley and foothill grassland (mesic), and Vernal pools, growing at elevations from 10 to 110 meters. Blennosperma bakeri is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
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Scientific Name: |
Blennosperma bakeri Heiser |
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Common Name: |
Sonoma sunshine |
| Family: | Asteraceae |
| Element Code: | PDAST1A010 |
| USDA Plants Symbol: | BLBA |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: Mar-May | Mar-May |
| Elevation: | 10-110 (35-360) |
| General Habitats: | Valley and foothill grassland, Vernal pools |
| Microhabitat: | |
| 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 |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 24 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 9 |
| Fair (C) | 6 |
| Poor (D) | 1 |
| None (X) | 5 |
| Unknown (U) | 3 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Mendocino (MEN), Sonoma (SON) | |
| Quads: Name (Quad Code) | |
| Cotati (3812236), Glen Ellen (3812235), Healdsburg (3812257), Laughlin Range (3912333), Santa Rosa (3812246), Sears Point (3812224), Sebastopol (3812247), Sonoma (3812234), Two Rock (3812237) | |
Threat List Data from the CNDDB
| Threat List Total: | 15 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 20 | 83 % | |
| Non-native plant impacts | 11 | 45% |
| Agriculture | 10 | 41% |
| Development | 10 | 41% |
| Grazing | 10 | 41% |
| Disking | 7 | 29% |
| ORV activity | 4 | 16% |
| Other | 4 | 16% |
| Vandalism/dumping/litter | 4 | 16% |
| Road/trail construction/maint. | 3 | 12% |
| Altered flood/tidal/hydrologic regime | 3 | 12% |
| Recreational use (non-ORV) | 2 | 8% |
| Biocides | 1 | 4% |
| Erosion/runoff | 1 | 4% |
| Wood cutting or brush clearing | 1 | 4% |
| Improper burning regime | 1 | 4% |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 17 November 2025].