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Home/Species/ Leiberg's Clover

Trifolium leibergii

A. Nels. & J.F. Macbr.

Leiberg's Clover

G3Vulnerable Found in 1 roadless area NatureServe Explorer →
G3VulnerableGlobal Rank
MediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.139752
Element CodePDFAB401B0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderFabales
FamilyFabaceae
GenusTrifolium
Other Common Names
Leiberg's clover (EN)
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 Date2015-11-03
Change Date2015-11-03
Edition Date2015-11-03
Edition AuthorsVrilakas, S. & K. Maybury (1996), rev. A. Tomaino (2003), rev. S. Vrilakas (2006), rev. A. Treher (2015)
Threat ImpactMedium
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences21 - 80
Rank Reasons
Known from about 23 sites in southcentral and southeastern Oregon (Harney and Malheur County) and in northeastern Nevada (Elko County). Surveys in the 300 km-area between the presently known sites could turn up more populations. There are many large populations, with over 10,000 plants, in Nevada. Threats of trampling and grazing by cattle are minimal.
Range Extent Comments
Occurs in Nevada (Elko County) and Oregon (Harney and Malheur County).
Occurrences Comments
Twenty-three occurrences, 13 in Nevada and 10 in Oregon.
Threat Impact Comments
May be threatened by ORV use, cattle trails through habitat, and threats to native pollinators (Center for Plant Conservation n.d.). Because the plants emerge early in the spring and complete their life-cycle early, grazing is not a major threat (Center for Plant Conservation n.d.).
Ecology & Habitat

Habitat

Barren, rocky slopes. In Oregon, on barren tuff near 1200 m elevation. In Nevada, on ash-flow tuff, bare shaley crests, and talus slopes at 2100-2400 m elevation.
Terrestrial Habitats
Bare rock/talus/scree
Other Nations (1)
United StatesN3
ProvinceRankNative
NevadaS2Yes
OregonS2Yes
Threat Assessments
ThreatScopeSeverityTiming
2 - Agriculture & aquacultureSmall (1-10%)Slight or 1-10% pop. declineHigh (continuing)
2.3 - Livestock farming & ranchingSmall (1-10%)Slight or 1-10% pop. declineHigh (continuing)
2.3.1 - Nomadic grazingSmall (1-10%)Slight or 1-10% pop. declineHigh (continuing)
6 - Human intrusions & disturbanceUnknownUnknownHigh (continuing)
6.1 - Recreational activitiesUnknownUnknownHigh (continuing)

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Plant Characteristics
Economic Value (Genus)Yes
Roadless Areas (1)
Nevada (1)
AreaForestAcres
McaffieHumboldt-Toiyabe National Forest26,110
References (5)
  1. Barneby, R.C. 1989. Fabales. In A. Cronquist, A.H. Holmgren, N.H. Holmgren, J.L. Reveal, and P.K. Holmgren (eds.). Intermountain flora: Vascular plants of the Intermountain West, U.S.A. Vol. 3, Part B. New York Botanical Garden, Bronx. 279 pp.
  2. Center for Plant Conservation. No date. National Collection Plant Profile: <i>Trifolium leibergii</i>. Online. Available: http://ridgwaydb.mobot.org/cpcweb/CPC_ViewProfile.asp?CPCNum=4325. Accessed 2003, September 22.
  3. Gillette, J.M. 1972. Taxonomy of <i>Trifolium </i>(Leguminosae) IV. The American species of section Lupinaster (Adanson) Seringe. Canadian J. Botany 50: 1975-2000.
  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.