Taxon Report
Plagiobothrys diffusus (Greene) Jtn.San Francisco popcornflower |
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Classification
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Scientific Name: |
Plagiobothrys diffusus (Greene) Jtn. |
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Common Name: |
San Francisco popcornflower |
| Family: | Boraginaceae |
| Element Code: | PDBOR0V080 |
| USDA Plants Symbol: | |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: Mar-Jun | Mar-Jun |
| Elevation: | 60-360 (195-1180) |
| General Habitats: | Coastal prairie, Valley and foothill grassland |
| Microhabitat: | |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1Q |
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State Rank: |
S1 |
| State List: | CE |
| Fed List: | None |
| Other Status: | SB_UCSC |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 17 |
| Element Occurrence Ranks: | |
| Excellent (A) | 2 |
| Good (B) | 5 |
| Fair (C) | 6 |
| Poor (D) | 1 |
| None (X) | 1 |
| Unknown (U) | 2 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Alameda (ALA), San Benito (SBT), San Francisco (SFO)*, San Mateo (SMT), Santa Cruz (SCR) | |
| Quads: Name (Quad Code) | |
| Ano Nuevo (3712213), Davenport (3712212), Felton (3712211), Franklin Point (3712223), Laurel (3712118), Oakland East (3712272), San Francisco North (3712274)*, San Juan Bautista (3612175), Santa Cruz (3612281), Watsonville West (3612187) | |
Threat List Data from the CNDDB
| Threat List Total: | 12 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 16 | 94 % | |
| Non-native plant impacts | 10 | 58% |
| Development | 9 | 52% |
| Other | 6 | 35% |
| Grazing | 5 | 29% |
| Recreational use (non-ORV) | 3 | 17% |
| Road/trail construction/maint. | 2 | 11% |
| Wood cutting or brush clearing | 2 | 11% |
| ORV activity | 2 | 11% |
| Improper burning regime | 1 | 5% |
| Erosion/runoff | 1 | 5% |
| Altered flood/tidal/hydrologic regime | 1 | 5% |
| Biocides | 1 | 5% |
Notes
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Threatened by development and non-native plants. Possibly threatened by grazing and vehicles. Identification difficult; taxonomic work needed. See P. reticulatus |
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Threats: |
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Taxonomy: |
Citation
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 December 2024].