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Caulanthus pilosus

S. Wats.

Hairy Wild Cabbage

G4Apparently Secure (G4G5) Found in 13 roadless areas NatureServe Explorer →
G4Apparently SecureGlobal Rank
Identity
Unique IDELEMENT_GLOBAL.2.151867
Element CodePDBRA0M0G0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderCapparales
FamilyBrassicaceae
GenusCaulanthus
Synonyms
Streptanthus pilosus(S. Watson) Jeps.
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 Date2023-06-29
Change Date2023-06-29
Edition Date2023-06-29
Edition AuthorsEberly (2023)
Range Extent200,000-2,500,000 square km (about 80,000-1,000,000 square miles)
Number of Occurrences81 - 300
Rank Reasons
Caulanthus pilosus is a biennial herb of the western United States with less than 300 occurrences. Most occurrences are in California and Nevada, but it also occurs along the border of Idaho and Oregon and in western Utah. More information is needed about abundance, threats, and trends to better inform the conservation status of this species. It can be locally common under favorable conditions.
Range Extent Comments
Caulanthus pilosus occurs in the western United States in eastern and northeastern California, southwestern Idaho, Nevada, southeastern Oregon, and western Utah (FNA 2010). Range extent was estimated using herbarium specimens collected between 1992 and 2023 and with historical occurrences included (CCH2 2023, GBIF 2023, iNaturalist 2023, SEINet 2023).
Occurrences Comments
By applying a 1 km separation distance to herbarium records and photo-based observations documented between 1992 and 2023, it is estimated that there are at least 228 occurrences rangewide (CCH2 2023, GBIF 2023, iNaturalist 2023, SEINet 2023). Most of the documented occurrences are in Nevada and California. This species
Threat Impact Comments
The impact of extended drought on this species should be considered. Reproduction is tied to favorable rainfall and possibly disturbance.
Ecology & Habitat

Habitat

This species is found in open dry areas, flats, and rocky slopes of pinyon-juniper woodland, scrub, cool desert shrub, grass and sagebrush communities at elevations ranging from 600 to 2,800 meters (Welsh et al. 2015, FNA 2010, Jepson Flora Project 2023).
Terrestrial Habitats
Forest/WoodlandWoodland - ConiferShrubland/chaparralDesert
Other Nations (1)
United StatesN4
ProvinceRankNative
CaliforniaSNRYes
NevadaS4Yes
OregonS2Yes
UtahS1Yes
IdahoSNRYes
Threat Assessments
ThreatScopeSeverityTiming
11 - Climate change & severe weatherLarge (31-70%)UnknownHigh (continuing)
11.2 - DroughtsLarge (31-70%)UnknownHigh (continuing)

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Plant Characteristics
DurationBIENNIAL
Economic Value (Genus)No
Roadless Areas (13)
California (6)
AreaForestAcres
Boundary Peak (CA)Inyo National Forest210,884
Deep WellsInyo National Forest7,681
Excelsior (CA)Inyo National Forest45,607
Glass MountainInyo National Forest52,867
HortonInyo National Forest5,717
Wonoga Pk.Inyo National Forest11,272
Nevada (7)
AreaForestAcres
Bald Mtn.Humboldt-Toiyabe National Forest41,598
Boundary Peak (NV)Inyo National Forest21,851
Chineese Camp (NV)Humboldt-Toiyabe National Forest15,207
Pine Grove SouthHumboldt-Toiyabe National Forest88,945
Rough CreekHumboldt-Toiyabe National Forest8,476
Toquima CaveHumboldt-Toiyabe National Forest43,147
West Walker (NV)Humboldt-Toiyabe National Forest5,683
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). 2010. Flora of North America north of Mexico. Vol. 7. Magnoliophyta: Salicaceae to Brassicaceae. Oxford University Press, New York. xxii + 797 pp.
  3. Global Biodiversity Information Facility (GBIF). 2023. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2023).
  4. iNaturalist. 2023. Online. Available: https://www.inaturalist.org (accessed 2023).
  5. Jepson Flora Project (eds.) 2023. Jepson eFlora. Online. Available: https://ucjeps.berkeley.edu/eflora/ (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. Southwest Environmental Information Network (SEINet). 2023. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2023).