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Home/Species/ Sandstone Milkvetch

Astragalus sesquiflorus

S. Wats.

Sandstone Milkvetch

G3Vulnerable (G3G4) Found in 1 roadless area NatureServe Explorer →
G3VulnerableGlobal Rank
Identity
Unique IDELEMENT_GLOBAL.2.155319
Element CodePDFAB0F830
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderFabales
FamilyFabaceae
GenusAstragalus
Other Common Names
sandstone milkvetch (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
Review Date2002-10-09
Change Date2002-10-09
Edition Date2002-10-09
Edition AuthorsFayette, Kim (1998)
Rank Reasons
There are at least 22 occurrences in Utah and Colorado. It is also reported from Arizona but there is no occurrence information on it.
Range Extent Comments
This species occurs in the Dolores River Valley (Weber and Wittmann 1996), Montrose County (CNHP 1998), Colorado; Garfield, Kane, San Juan, Wayne, and disjunctly in Sanpete counties, Utah (Welsh et al. 1993); and Northern Navajo and Coconino counties, Arizona (Kearney et al. 1951).
Occurrences Comments
There are two occurrences in Colorado, last seen in 1982 and 1985 (CNHP 1998). It is estimated that there are between 20-100 occurrences in Utah based on the state rank of S3. There is no available information on the number of occurrences in Arizona.
Ecology & Habitat

Habitat

On slickrock formations (Weber and Wittmann 1996). Mixed desert shrub, pinyon-juniper, and ponderosa pine or aspen communities at 1470-3100 meters (Welsh et al. 1993).
Terrestrial Habitats
Woodland - ConiferWoodland - MixedDesert
Other Nations (1)
United StatesN3
ProvinceRankNative
UtahS3Yes
ColoradoS1Yes
ArizonaS3Yes
Plant Characteristics
Economic Value (Genus)Yes
Roadless Areas (1)
Utah (1)
AreaForestAcres
Capital ReefDixie National Forest763
References (7)
  1. Arizona Heritage Data Management System. 1998. Arizona Game and Fish Department, Phoenix, AZ.
  2. Barneby, R.C. 1964. Atlas of North American Astragalus. 2 Vols. New York Botanical Garden, Bronx, New York. 1188 pp.
  3. Colorado Natural Heritage Program. 1998. Biological Conservation Datasystem. Colorado State University, Ft. Collins, CO.
  4. 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.
  5. Kearney, T.H., R.H. Peebles, and collaborators. 1951. Arizona flora. 2nd edition with Supplement (1960) by J.T. Howell, E. McClintock, and collaborators. Univ. California Press, Berkeley. 1085 pp.
  6. Weber, W.A., and R.C. Wittmann. 1996a. Colorado flora: Eastern slope. Revised edition. Univ. Press of Colorado, Niwot, Colorado. 524 pp.
  7. Welsh, S.L., N.D. Atwood, S. Goodrich, and L.C. Higgins (eds.) 1993. A Utah flora. 2nd edition. Brigham Young Univ., Provo, Utah. 986 pp.