Species Details
Plagiobothrys diffusus
San Francisco popcornflower
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Scientific Name: Plagiobothrys diffusus (Greene) Jtn. |
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Common Name: San Francisco popcornflower |
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| Family: | Boraginaceae | |
| Element Code: | PDBOR0V080 | |
| USDA Plants Symbol: | ||
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Synonyms/Other Names: |
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| CA Rare Plant Rank: | 1B.1 |
| Fed List: | None |
| State List: | CE (1979-09-01) |
| Global Rank: | G1Q |
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State Rank: |
S1 |
| Other Status: | SB_UCSC |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2021-05-26 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: Mar-Jun
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Elevation:
60 - 360 meters 195 - 1180 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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Notes: Threatened by development and non-native plants. Possibly threatened by grazing and vehicles. Identification difficult; taxonomic work needed. See P. reticulatus var. rossianorum in The Jepson Manual. See Pittonia 1:14 (1887) for original description, and Contributions from the Arnold Arboretum 3:77 (1932) for revised nomenclature. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 12 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 16 | 94 % |
| THREAT LIST: | ||
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| 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% |
| Total Occurrences: | 17 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 2 | 5 | 6 | 1 | 1 | 2 |
| Occurrence Status: | |||||
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| Historical >20 Years | 9 | ||||
| Recent <=20 Years | 8 | ||||
| Presence: | |||||
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| Presumed Extant | 16 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 1 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Alameda (ALA), San Benito (SBT), San Francisco (SFO)*, San Mateo (SMT), Santa Cruz (SCR) |
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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) |
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Notes:
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Presumed Extant
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