Roadless Areas
Home/Species/ White Mountains Horkelia

Horkelia hispidula

Rydb.

White Mountains Horkelia

G3Vulnerable Found in 5 roadless areas NatureServe Explorer →
G3VulnerableGlobal Rank
LowThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.128770
Element CodePDROS0W0A0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderRosales
FamilyRosaceae
GenusHorkelia
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 Date2015-08-17
Change Date2015-08-17
Edition Date2015-08-17
Edition AuthorsGries, D., and M. Martinez, rev. A. Tomaino (2015)
Threat ImpactLow
Range Extent100-250 square km (about 40-100 square miles)
Number of Occurrences6 - 20
Rank Reasons
Known only from the White Mountains of California and adjacent Nevada. There are approximately 12 populations. Threats are relatively low.
Range Extent Comments
Occurs in the White Mountains of California and adjacent Nevada (Flora of North America Editorial Committee 2014). Collected in Nevada by Dean Taylor in 1995.
Occurrences Comments
Known from approximately 12 populations, 11 in California and 1 in Nevada (Element occurrence data in the NatureServe central database as of July 2015).
Threat Impact Comments
Relatively few threats since endemic to the White Mountains (R. Bittman, pers. comm., 2014). Livestock grazing may be a minor threat in some areas (Element occurrence data in the NatureServe central database as of July 2015; R. Bittman, pers. comm., 2014).
Ecology & Habitat

Habitat

Dry, rocky alpine flats, in subalpine conifer woodlands (Flora of North America Editorial Committee 2014). Alpine dwarf scrub, Great Basin scrub, subalpine coniferous forest (Skinner, 1997; CNPS 2015). Dry flats, 3000 to 3400 m (Baldwin et al. 2012).
Terrestrial Habitats
Forest/WoodlandForest - ConiferWoodland - ConiferShrubland/chaparralAlpine
Other Nations (1)
United StatesN3
ProvinceRankNative
CaliforniaS3Yes
NevadaS1Yes
Threat Assessments
ThreatScopeSeverityTiming
2 - Agriculture & aquacultureRestricted (11-30%)Moderate or 11-30% pop. decline—
2.3 - Livestock farming & ranchingRestricted (11-30%)Moderate or 11-30% pop. decline—

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Plant Characteristics
Economic Value (Genus)No
Roadless Areas (5)
California (3)
AreaForestAcres
Birch CreekInyo National Forest28,816
Black CanyonInyo National Forest32,421
Boundary Peak (CA)Inyo National Forest210,884
Nevada (2)
AreaForestAcres
Boundary Peak (NV)Inyo National Forest21,851
SugarloafInyo National Forest11,534
References (8)
  1. Baldwin, B. G., D. H. Goldman, D. J. Keil, R. Patterson, T. J. Rosatti, and D. H. Wilken, eds. 2012. The Jepson manual: vascular plants of California. 2nd edition. University of California Press, Berkeley, CA. 1568 pp.
  2. California Department of Fish and Game. 1997. RareFind 2 personal computer program. Information dated March 1999. Sacramento, California.
  3. California Native Plant Society (CNPS). 2015. Inventory of Rare and Endangered Plants (online edition, v8-02). California Native Plant Society, Sacramento, CA. Online. Available: http://www.rareplants.cnps.org (accessed 2015).
  4. Flora of North America Editorial Committee (FNA). 2014b. Flora of North America north of Mexico. Vol. 9. Magnoliophyta: Picramniaceae to Rosaceae. Oxford University Press, New York. xxiv + 713 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. 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.
  7. Töpel, M., A. Antonelli, C. Yesson, and B. Eriksen. 2012. Past climate change and plant evolution in western North America: a case study in Rosaceae. PLoS ONE 7(12): 16 pp.
  8. Töpel M., M. Lundberg, T. Eriksson, and B. Eriksen. 2011. Molecular data and ploidal levels indicate several putative allopolyploidization events in the genus <i>Potentilla</i> (Rosaceae). PLOS Currents Tree of Life. 2011 May 18: 1-29.