Species Details

Plagiobothrys diffusus

San Francisco popcornflower

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Scientific Name:
Plagiobothrys diffusus (Greene) Jtn.
Common Name:
San Francisco popcornflower
Family: Boraginaceae
Element Code: PDBOR0V080
USDA Plants Symbol:
Synonyms/Other Names:
Lifeform: annual herb
Blooming Period: Mar-Jun
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Elevation:
60 - 360 meters
195 - 1180 feet
General Habitats:
  • Coastal prairie
  • Valley and foothill grassland
Microhabitat Details:
Microhabitat:
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.
Threats:
Taxonomy:
Threat List Total: 12
Total EOs % of EOs
EOs with Threat Listed: 16 94 %
THREAT LIST:
Non-native plant impacts 10 58%
Development 9 52%
Other 6 35%
Grazing 5 29%
Recreational use (non-ORV) 3 17%
Total Occurrences: 17
Element Occurrence Ranks:
A B C D X U
2 5 6 1 1 2
Occurrence Status:
Historical >20 Years 9
Recent <=20 Years 8
Presence:
Presumed Extant 16
Possibly Extirpated 0
Presumed Extirpated 1
California Endemic:
California Island:
States: Name (Code)
California (CA)
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)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Presumed Extant
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