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Home/Species/ Shevock's Milkvetch

Astragalus shevockii

Barneby

Shevock's Milkvetch

G2Imperiled Found in 1 roadless area NatureServe Explorer →
G2ImperiledGlobal Rank
LowThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.158790
Element CodePDFAB0F850
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderFabales
FamilyFabaceae
GenusAstragalus
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 Date2016-03-22
Change Date2016-03-22
Edition Date2017-12-21
Edition AuthorsBittman, R.L., and J. Shevock (1987), rev. K. Gravuer (2009), rev. Bittman and Treher (2016), rev. A. Tomaino (2017)
Threat ImpactLow
Range Extent<100 square km (less than about 40 square miles)
Number of Occurrences1 - 20
Rank Reasons
Astragalus shevockii is endemic to a very small area within the lower portion of the Little Kern River drainage in southeastern Tulare County, California. Within this range, it is described as "rare and local" and is known from 6 occurrences. All known occurrences are within the Golden Trout wilderness area of the Sequoia National Forest, and threats are believed to be low (possibly some cattle trampling). Occurrences should be surveyed to update status of sites, number of plants, and threats.
Range Extent Comments
Endemic to the lower portion of the Little Kern River drainage, Sequoia National Forest; in the southern High Sierra Nevada region, southeastern Tulare County, California (Barneby 1977, Hickman 1993, USFS 2004).
Occurrences Comments
Six element occurrences are mapped by the California Natural Diversity Database (CNDDB 2016); only one has been observed since 1983. The U.S. Forest Service (2004) reports that the species is "known from about 16 occurrences" without further details, which may reflect a difference in occurrence delineation or the discovery of additional sites not yet incorporated into CNDDB. Both sources agree that the species is endemic to the Little Kern River drainage.
Threat Impact Comments
Some cattle trampling. No other threats are known (USFS 2004).
Ecology & Habitat

Habitat

Open upper montane Jeffrey pine forest in pine needle duff, usually on shallow soils of granitic sand, sometimes on volcanic soils. Associated species include Lotus nevadensis, Arctostaphylos patula, Ceanothus pinetorum, Sidalcea multifida, and Pedicularis semibarbata. 1890 - 2060 m.
Terrestrial Habitats
Forest/WoodlandForest - ConiferWoodland - Conifer
Other Nations (1)
United StatesN2
ProvinceRankNative
CaliforniaS2Yes
Threat Assessments
ThreatScopeSeverityTiming
2 - Agriculture & aquaculture———
2.3 - Livestock farming & ranching———

—

Plant Characteristics
Economic Value (Genus)Yes
Roadless Areas (1)
California (1)
AreaForestAcres
RinconSequoia National Forest54,610
References (7)
  1. Barneby, R. C. 1977. Dragma Hippomanicum III: Novitates Californicae. Brittonia 29: 376-381.
  2. California Native Plant Society (CNPS). 2009. Inventory of Rare and Endangered Plants. California Native Plant Society. Sacramento, CA. Online. Available: http://www.cnps.org/inventory (accessed 2009).
  3. California Natural Diversity Database (CNDDB). 2016. RareFind Version 5.1.1. California Department of Fish and Game, Sacramento.
  4. CNDDB [California Natural Diversity Data Base]. No date. Unpublished data files. California Natural Diversity Data Base, California Natural Heritage Division, Sacramento.
  5. Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.
  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. U.S. Forest Service (USFS). 2004. Sierra Nevada Forest Plan Amendment: Final Supplemental Environmental Impact Statement. Pacific Southwest Region. R5-MB-046. January 2004.