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Draba pennellii

Rollins

Pennell's Draba

G2Imperiled Found in 1 roadless area NatureServe Explorer →
G2ImperiledGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.137161
Element CodePDBRA112V0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderCapparales
FamilyBrassicaceae
GenusDraba
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 Date2022-12-06
Change Date1988-08-03
Edition Date2022-12-06
Edition AuthorsOliver, L., rev. J. McClinton (2022)
Threat ImpactUnknown
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences6 - 20
Rank Reasons
Draba pennellii is restricted to White Pine County, Nevada and Juab County, Utah, in the western United States, where it is known from 16 sites. Surveys for this plant are not yet complete. Threats are not well understood, but may include climate change and drought, and potential future introduction of non-native mountain goats to habitat in Utah. This species largely occurs in remote and inaccessible crevices and ledges of carbonate or quartzite cliffs and rock faces that are unlikely to experience significant direct human impacts.
Range Extent Comments
Draba pennellii occurs in the western United States. This species was previously only known from White Pine County, Nevada but was discovered in 2010 in the Deep Creek Mountains of western Juab county, Utah (Harris 2010).
Occurrences Comments
There are 16 occurrences known for this species, mapped using a 1.0 km minimum separation distance.
Threat Impact Comments
Threats to this species are not well documented, but may include climate change and drought (Caicco et al. 2012). Both Nevada and Utah experienced severe to exceptional drought over most of the state in 2021 and 2022, with likely negative impacts to this species similar to other perennial forbs in both states (U.S. Drought Monitor 2022, Utah Natural Heritage Program 2022). In general, this species occupies remote, difficult-to-access places that are unlikely to experience significant direct human impacts (J. McClinton, pers. comm. 2022). Potential future threats may include introduction of bighorn sheep or non-native mountain goats to mountain ranges in Utah (Utah Natural Heritage Program 2022).
Ecology & Habitat

Habitat

This species grows on rocky ledges, slopes, and cliff faces at elevations between 1900 and 3650 m.
Terrestrial Habitats
Forest/WoodlandForest - ConiferWoodland - ConiferAlpineBare rock/talus/screeCliff
Other Nations (1)
United StatesN2
ProvinceRankNative
NevadaS2Yes
UtahS1Yes
Threat Assessments
ThreatScopeSeverityTiming
8 - Invasive & other problematic species, genes & diseasesUnknownUnknownModerate (short-term)
8.1 - Invasive non-native/alien species/diseasesUnknownUnknownModerate (short-term)
8.1.2 - Named speciesUnknownUnknownModerate (short-term)
11 - Climate change & severe weatherPervasive (71-100%)Moderate - slightHigh (continuing)
11.2 - DroughtsPervasive (71-100%)Moderate - slightHigh (continuing)

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Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (1)
Nevada (1)
AreaForestAcres
South SchellHumboldt-Toiyabe National Forest125,614
References (8)
  1. Caicco, S., F. Edwards, and J. Bair. 2012. Assessing vulnerability of the rarest plants in the Great Basin of Nevada to climate change. Calocortiana 91-105.
  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. Harris, J.G. 2010. First reports of <i>Draba pennellii</i> and <i>Draba pedicellata</i> (Cruciferae) in Utah, and new distribution records for <i>Draba kassii</i>, <i>Draba novolympica</i>, and <i>Hackelia ibapensis</i> (Boraginaceae). Western North American Naturalist 70(2): 255–25.
  4. Kartesz, J.T. 1988. A flora of Nevada. Ph.D. dissertation. Univ. of Nevada, Reno. 3 volumes. 1729 pp.
  5. 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.
  6. McClinton, Jamey. Personal Communication. Botanist. Nevada Division of Natural Heritage, Carson City, Nevada.
  7. U.S. Drought Monitor. 2022. Time Series. Online. Available: https://droughtmonitor.unl.edu/DmData/TimeSeries.aspx
  8. Utah Natural Heritage Program. 2022. Element Subnational Ranking Form: <i>Draba pennellii</i> in Biotics 5 database. NatureServe, Arlington, Virginia (accessed 8 Dec 2022).