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Delphinium nudicaule

Torr. & Gray

Red Larkspur

G4Apparently Secure (G4G5) Found in 58 roadless areas NatureServe Explorer →
G4Apparently SecureGlobal Rank
Medium - lowThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.131208
Element CodePDRAN0B160
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderRanunculales
FamilyRanunculaceae
GenusDelphinium
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 Method Rank calculation - Biotics v2
Review Date2023-08-04
Change Date2023-08-04
Edition Date2023-08-04
Edition AuthorsVrilakas, Sue (2000), rev. C. Nordman (2023).
Threat ImpactMedium - low
Range Extent20,000-2,500,000 square km (about 8000-1,000,000 square miles)
Number of Occurrences> 300
Rank Reasons
Delphinium nudicaule occurs in the Coastal Range of the western United States, in California from Kern and San Luis Obispo counties, north to Jackson County in southwestern Oregon. It has been considered to be common in California, but is rare and limited in Oregon to Jackson County in the southwestern part of the state. There are estimated to be about 1100 occurrences, including on many National Forests and State Parks in California. Populations are thought to be stable, but threats may include mining, timber harvest, cattle grazing, rural residential development, and long-term or extreme drought, such as may be associated with climate change.
Range Extent Comments
Delphinium nudicaule occurs in the Coastal Range of the western United States, in California from Kern and San Luis Obispo counties, north to Jackson County in southwestern Oregon (Flora of North America Editorial Committee 1997, Koontz and Warnock 2012). The range extent was estimated to be 190,000 square kilometers, using herbarium specimens and photo-based observations documented between 1992 and 2023 (GBIF 2023, iNaturalist 2023, CCH2 Portal 2023).
Occurrences Comments
Based on herbarium records, and photo-based observations documented between 1992 and 2023, there are about 1100 occurrences rangewide (CCH2 Portal 2023, GBIF 2023, iNaturalist 2023).
Threat Impact Comments
Threats may include mining, timber harvest, cattle grazing, rural residential development, and long-term or extreme drought, such as may be associated with climate change.
Ecology & Habitat

Habitat

This species grows in rocky, talus slopes and outcrops within coniferous forests.
Terrestrial Habitats
Forest - ConiferBare rock/talus/scree
Other Nations (1)
United StatesN4
ProvinceRankNative
OregonS2Yes
CaliforniaSNRYes
Threat Assessments
ThreatScopeSeverityTiming
1 - Residential & commercial developmentSmall (1-10%)Serious or 31-70% pop. declineHigh (continuing)
1.1 - Housing & urban areasSmall (1-10%)Serious or 31-70% pop. declineHigh (continuing)
2 - Agriculture & aquacultureRestricted (11-30%)UnknownHigh (continuing)
2.3 - Livestock farming & ranchingRestricted (11-30%)UnknownHigh (continuing)
3 - Energy production & miningSmall (1-10%)Serious or 31-70% pop. declineHigh (continuing)
3.2 - Mining & quarryingSmall (1-10%)Serious or 31-70% pop. declineHigh (continuing)
11 - Climate change & severe weatherLarge - restrictedModerate or 11-30% pop. declineHigh (continuing)
11.2 - DroughtsLarge - restrictedModerate or 11-30% pop. declineHigh (continuing)

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Plant Characteristics
Economic Value (Genus)No
Roadless Areas (58)
California (57)
AreaForestAcres
BackboneShasta-Trinity National Forest11,466
Bell QuinbyShasta-Trinity National Forest11,556
Big Butte ShinboneSix Rivers National Forest1,102
Black ButteMendocino National Forest15,461
Board CampSix Rivers National Forest4,527
Bucks LakePlumas National Forest680
Callahan FlowKlamath National Forest3,231
Callahan FlowModoc National Forest6,618
Castle Crags AShasta-Trinity National Forest113
Castle Crags BShasta-Trinity National Forest1,619
Chalk PeakLos Padres National Forest7,472
ChanchelullaShasta-Trinity National Forest3,915
ChinquapinShasta-Trinity National Forest22,040
Chips CreekLassen National Forest29,089
Chips CreekPlumas National Forest12,940
Cow CreekShasta-Trinity National Forest22,627
Cow CreekSix Rivers National Forest1,271
Cub CreekLassen National Forest8,643
Deer MountainMendocino National Forest11,716
Devils RockShasta-Trinity National Forest16,209
EagleShasta-Trinity National Forest6,553
East ForkShasta-Trinity National Forest6,201
East GirardShasta-Trinity National Forest27,894
Elk CreekMendocino National Forest23,182
Fisher Gulch BShasta-Trinity National Forest4,791
GrindstoneMendocino National Forest26,031
Grizzly PeakPlumas National Forest6,222
IshiLassen National Forest21,805
Kettle Mtn.Shasta-Trinity National Forest4,589
Lake EleanorShasta-Trinity National Forest397
LavasModoc National Forest25,864
Little French CShasta-Trinity National Forest11,529
MayfieldLassen National Forest14,444
Middle ForkPlumas National Forest29,278
Mill CreekLassen National Forest7,587
Mt. LassicSix Rivers National Forest6,643
Mt. Shasta BShasta-Trinity National Forest2,809
Orleans Mtn.Klamath National Forest49,090
Orleans Mtn. BSix Rivers National Forest17,183
Orleans Mtn. CSix Rivers National Forest15,589
PantherShasta-Trinity National Forest12,016
Pilot CreekSix Rivers National Forest9,192
PortugueseKlamath National Forest18,915
Reister CanyonMendocino National Forest5,897
Salt GulchShasta-Trinity National Forest6,511
SiskiyouKlamath National Forest54,039
Skeleton GladeMendocino National Forest9,237
Snow MountainMendocino National Forest14,457
SoliderSix Rivers National Forest14,918
South ForkShasta-Trinity National Forest16,786
ThatcherMendocino National Forest16,652
Thomes CreekMendocino National Forest16,616
Timbered CraterLassen National Forest4,096
UnderwoodSix Rivers National Forest6,591
Weaver BallyShasta-Trinity National Forest829
Wells MountainShasta-Trinity National Forest5,919
West GirardShasta-Trinity National Forest37,516
Oregon (1)
AreaForestAcres
South KalmiopsisSiskiyou National Forests104,477
References (7)
  1. CCH2 Portal. 2023. Consortium of California Herbaria. Online. Available: https//:www.cch2.org/portal/index.php (accessed 2023).
  2. 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.
  3. Global Biodiversity Information Facility (GBIF). 2023. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2023).
  4. Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.
  5. iNaturalist. 2023. Online. Available: https://www.inaturalist.org (accessed 2023).
  6. 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.
  7. Koontz, J.A. and M.J. Warnock. 2012. <i>Delphinium nudicaule</i>, in Jepson Flora Project (eds.) Jepson eFlora. Online. Available: https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=22492 (accessed on August 04, 2023).