CNPS

CNPS Rare Plant Inventory

Species Details

Lupinus ludovicianus

San Luis Obispo County lupine

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  Classification

Scientific Name:
Lupinus ludovicianus Greene
Common Name:
San Luis Obispo County lupine
Family: Fabaceae
Element Code: PDFAB2B2G0
USDA Plants Symbol: LULU
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G1
State Rank:
 S1
Other Status: SB_SBBG; USFS_S
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2022-12-06

  Ecology and Life History

Lifeform: perennial herb
Blooming Period: Apr-Jul
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Elevation:
50 - 525 meters
165 - 1725 feet
General Habitats:
  • Chaparral
  • Cismontane woodland
Microhabitat Details:
Microhabitat:
  • Sandstone
  • Sandy

  Notes

Notes:
Known from fewer than twenty occurrences. Threatened by agriculture, development, vehicles, grazing and trampling. Official flower of SLO Co. See Bulletin of the California Academy of Sciences 1:184 (1885) for original description.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

Threat List Total: 6
Total EOs % of EOs
EOs with Threat Listed: 13 81 %
THREAT LIST:
Grazing 11 68%
Agriculture 4 25%
Development 3 18%
Foot traffic/trampling 1 6%
ORV activity 1 6%

  Occurrence Data from the CNDDB

Total Occurrences: 16
Element Occurrence Ranks:
A B C D X U
0 3 3 1 4 5
Occurrence Status:
Historical >20 Years 10
Recent <=20 Years 6
Presence:
Presumed Extant 12
Possibly Extirpated 2
Presumed Extirpated 2

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
San Luis Obispo (SLO)
Quads: Name (Quad Code)
Arroyo Grande NE (3512025)*, Caldwell Mesa (3512023), Lopez Mtn. (3512035), Nipomo (3512014), Pismo Beach (3512026), Pozo Summit (3512033), Santa Margarita Lake (3512034), Tar Spring Ridge (3512024)
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.
Regional Map

  Map

Presumed Extant
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 18 April 2024].