Roadless Areas
Home/Species/ Nevin's Barberry

Berberis nevinii

A. Gray

Nevin's Barberry

G1Critically Imperiled Found in 40 roadless areas NatureServe Explorer →
G1Critically ImperiledGlobal Rank
Identity
Unique IDELEMENT_GLOBAL.2.146118
Element CodePDBER060A0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderRanunculales
FamilyBerberidaceae
GenusBerberis
Synonyms
Alloberberis nevinii(A.Gray) C.C.Yu & K.F.ChungMahonia nevinii(Gray) Fedde
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 Date2015-10-08
Change Date2013-08-20
Edition Date1997-06-23
Edition AuthorsMaybury, K., rev. D. Gries (1998)
Number of Occurrences6 - 20
Rank Reasons
Mahonia nevinii is known from three counties in southern California. At least 7 of the 32 known populations have been extirpated and the remaining (twenty-one extant) populations are small (almost all have fewer than 10-20 individuals). The only large populations are in danger of being eliminated by encroaching urban development, off-road vehicles, horseback riding, invasive exotic species, vandalism, and altered fire regimes.
Range Extent Comments
Ranges from the foothills of the San Gabriel Mountains of Los Angeles County to near the foothills of the Peninsular Ranges of southwestern Riverside County, California (Fish and Wildlife Service 1998).
Occurrences Comments
Historically, the range of this species probably consisted of fewer than thirty scattered occurrences. There are twenty-one extant occurrences and at least seven populations of the thirtyish known occurrences have been extirpated (Fish and Wildlife Service 1998).
Threat Impact Comments
Construction, urban development, off-road vehicles, horseback riding, invasive exotic species, vandalism, and altered fire regimes (Fish and Wildlife Service 1998).
Ecology & Habitat

Habitat

2 habitat types: the margins of dry washes with sandy and gravelly substrates and alluvial shrub communities; and steep slopes with coarse soils and chaparral communities. The presence of groundwater flow may be a habitat requirement.
Terrestrial Habitats
Shrubland/chaparral
Other Nations (1)
United StatesN1
ProvinceRankNative
CaliforniaS1Yes
Threat Assessments
ThreatScopeSeverityTiming
1 - Residential & commercial developmentUnknownUnknownUnknown
1.1 - Housing & urban areasUnknownUnknownUnknown
6 - Human intrusions & disturbanceUnknownUnknownUnknown
6.1 - Recreational activitiesUnknownUnknownUnknown
7 - Natural system modificationsUnknownUnknownUnknown
7.1 - Fire & fire suppressionUnknownUnknownUnknown
8 - Invasive & other problematic species, genes & diseasesUnknownUnknownUnknown
8.1 - Invasive non-native/alien species/diseasesUnknownUnknownUnknown

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Plant Characteristics
Economic Value (Genus)No
Roadless Areas (40)
California (40)
AreaForestAcres
Arroyo SecoAngeles National Forest4,703
Barker ValleyCleveland National Forest11,940
Cahuilla MountainSan Bernardino National Forest6,952
CajonSan Bernardino National Forest7,548
CalienteCleveland National Forest5,953
Circle MountainSan Bernardino National Forest6,375
City CreekSan Bernardino National Forest9,997
ColdwaterCleveland National Forest8,402
Crystal CreekSan Bernardino National Forest6,783
Cucamonga AAngeles National Forest1,249
Cucamonga AAngeles National Forest1,249
Cucamonga BSan Bernardino National Forest11,933
Cucamonga CSan Bernardino National Forest4,106
Cutca ValleyCleveland National Forest14,530
Deep CreekSan Bernardino National Forest23,869
Eagle PeakCleveland National Forest6,481
Hixon FlatSan Bernardino National Forest8,095
LaddCleveland National Forest5,300
Magic MountainAngeles National Forest15,542
Mill PeakSan Bernardino National Forest7,884
No NameCleveland National Forest4,897
Pleasant ViewAngeles National Forest26,395
Raywood Flat BSan Bernardino National Forest11,373
Red MountainAngeles National Forest8,034
Red MountainAngeles National Forest8,034
San DimasAngeles National Forest7,160
San Gabriel AddAngeles National Forest2,527
San Gabriel AddAngeles National Forest2,527
San Mateo CanyonCleveland National Forest65
San SevaineSan Bernardino National Forest6,866
Sheep MountainAngeles National Forest21,098
Sill HillCleveland National Forest5,294
Strawberry PeakAngeles National Forest7,245
TrabucoCleveland National Forest23,341
TuleAngeles National Forest9,861
West ForkAngeles National Forest1,169
WestforkAngeles National Forest4,407
WestforkAngeles National Forest4,407
White LedgeLos Padres National Forest18,632
WildhorseCleveland National Forest1,483
References (5)
  1. Flora of North America Editorial Committee (FNA). 1997. Flora of North America north of Mexico. Vol. 3. Magnoliophyta: Magnoliidae and Hamamelidae. Oxford Univ. Press, New York. xxiii + 590 pp.
  2. Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.
  3. 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.
  4. U.S. Fish and Wildlife Service (USFWS). 1995. Proposed endangered and threatened status for four chaparral plants from southwestern California and northwestern Baja California, Mexico. Federal Register 60(190): 51443-51452.
  5. U.S. Fish and Wildlife Service (USFWS). 1998. Endangered and threatened wildlife and plants: endangered or threatened status for three plants from the chaparral and scrub of southwestern California. Federal Register 63(197):54956-54971.