Roadless Areas
Home/Species/ San Luis Obispo County Lupine

Lupinus ludovicianus

Greene

San Luis Obispo County Lupine

G1Critically Imperiled Found in 2 roadless areas NatureServe Explorer →
G1Critically ImperiledGlobal Rank
HighThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.137529
Element CodePDFAB2B2G0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderFabales
FamilyFabaceae
GenusLupinus
Concept Reference
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Conservation Status
Rank MethodLegacy Rank calculation - Excel v3.1x
Review Date2016-08-15
Change Date2016-08-15
Edition Date2018-04-20
Edition AuthorsBittman, R.L., rev. R. Bittman (2006, 2016), rev. Treher (2018)
Threat ImpactHigh
Range Extent250-1000 square km (about 100-400 square miles)
Number of Occurrences6 - 20
Rank Reasons
Endemic to the Santa Margarita Formation in San Luis Obispo County, California, Lupinus ludovicianus is known from about 16 occurrences. However, 5 are historic and another 4 are extirpated. Development for urban use or agriculture, grazing and OHV use are threats and its sandy habitat is easily disturbed. Most sites occur on private lands and none are protected. There is one occurrence on USFS land.
Range Extent Comments
Lupinus ludovicianus occurs only on Santa Margarita Formation in San Luis Obispo County, California.
Occurrences Comments
There are 16 occurrences but 5 are historic (surveyed 20 or more years ago) and 4 are extirpated.
Threat Impact Comments
Threats to this species include development, grazing, agriculture, and OHV use. All of these are significant. Most sites occur on private lands.
Ecology & Habitat

Habitat

This species occurs in chaparral and cismontane woodlands in mountains above San Luis Obispo in San Luis Obispo County, on sandstone/sandy substrates of the Santa Margarita Form.
Terrestrial Habitats
Forest/WoodlandShrubland/chaparral
Other Nations (1)
United StatesN1
ProvinceRankNative
CaliforniaS1Yes
Threat Assessments
ThreatScopeSeverityTiming
1 - Residential & commercial development———
2 - Agriculture & aquaculture———
6 - Human intrusions & disturbance———
6.1 - Recreational activities———

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Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (2)
California (2)
AreaForestAcres
Garcia MountainLos Padres National Forest7,850
Machesna MountainLos Padres National Forest12,271
References (2)
  1. Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
  2. Skinner, M.W., and B.M. Pavlik, eds. 1997 (1994). Inventory of rare and endangered vascular plants of California. 1997 Electronic Inventory Update of 1994 5th edition, California Native Plant Society, Special Publication No. 1, Sacramento.