Roadless Areas
Home/Species/ Deane's Milkvetch

Astragalus deanei

(Rydb.) Barneby

Deane's Milkvetch

G1Critically Imperiled Found in 2 roadless areas NatureServe Explorer →
G1Critically ImperiledGlobal Rank
HighThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.147831
Element CodePDFAB0F2R0
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 Date2016-11-28
Change Date2016-11-28
Edition Date2017-10-18
Edition AuthorsBittman, R.L., rev. L. Oliver (2003), rev. Treher (2017)
Threat ImpactHigh
Range Extent1000-5000 square km (about 400-2000 square miles)
Number of Occurrences6 - 20
Rank Reasons
Astragalus deanei is endemic to California and occurs only in San Diego County. It is known from 17 occurrences and is threatened by development and mining in the foothills.
Range Extent Comments
Endemic to southern San Diego County, California.
Occurrences Comments
Eighteen occurrences but one is extirpated.
Threat Impact Comments
This species is most threatened by development (CNPS 2001, CNDDB 2003). Other threats that exist at ocurrences include grazing, recreational use and erosion from trails (CNDDB 2003).
Ecology & Habitat

Habitat

Open chaparral or exposed slopes as well as in understory of coast live oaks.
Terrestrial Habitats
Forest/WoodlandWoodland - HardwoodShrubland/chaparral
Other Nations (1)
United StatesN1
ProvinceRankNative
CaliforniaS1Yes
Threat Assessments
ThreatScopeSeverityTiming
1 - Residential & commercial development———
2 - Agriculture & aquaculture———
6 - Human intrusions & disturbance———
6.1 - Recreational activities———

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Plant Characteristics
Economic Value (Genus)Yes
Roadless Areas (2)
California (2)
AreaForestAcres
No NameCleveland National Forest4,897
Pine CreekCleveland National Forest503
References (4)
  1. California Department of Fish and Game. 2000. Natural Diversity Database (RareFind 2), Version 2.1.2, January 25, 2000. Downloaded in 2003.
  2. California Native Plant Society (CNPS). 2001. Inventory of Rare and Endangered Plants of California (sixth edition). Rare Plant Scientific Advisory Committee, David P. Tibor, Convening Editor. California Native Plant Society. Sacramento, CA. x + 388pp.
  3. 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.
  4. 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.