Astragalus ampullarioides - (Welsh) Welsh
Shivwits Milkvetch
Synonym(s): Astragalus eremiticus var. ampullarioides Welsh
Taxonomic Status: Not accepted
Unique Identifier: ELEMENT_GLOBAL.2.135255
Element Code: PDFAB0FBK0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Pea Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Fabales Fabaceae Astragalus
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Concept Reference
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Concept Reference: 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.
Concept Reference Code: B93WEL01HQUS
Name Used in Concept Reference: Astragalus eremiticus var. ampullarioides
Taxonomic Comments: Kartesz (1999), Isely (1998), and Barneby (1989) do not recognize this entity, at either the species or infraspecific levels, instead including Astragalus ampullarioides (also known as A. eremiticus var. ampullarioides) in A. eremiticus, with no varieties recognized. USFWS and Welsh (1998) recognize at the full species level: A. ampullarioides (Great Basin Naturalist 58(1):51).
Conservation Status
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NatureServe Status

Global Status: G1Q
Global Status Last Reviewed: 10Nov2015
Global Status Last Changed: 19Jul1991
Ranking Methodology Used: Ranked by calculator
Rounded Global Status: G1 - Critically Imperiled
Reasons: Edaphic endemic with a very small range that occurs on one geological formation in Washington Co., Utah. There are seven extant populations with most of the potential habitat previously destroyed by urban development. More than 50 percent of known populations has been destroyed (from about 2000 to less than 1000 individuals). (Armstrong and Harper 1991, VanBuren 1992). Threats include development, trampling, grazing, and pollinator declines.
Nation: United States
National Status: N1

U.S. & Canada State/Province Status
Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
United States Utah (S1)

Other Statuses

U.S. Endangered Species Act (USESA): LE: Listed endangered (28Sep2001)
U.S. Fish & Wildlife Service Lead Region: R6 - Rocky Mountain

NatureServe Global Conservation Status Factors

Range Extent Comments: Endemic to a single geological formation in one area of Washington Co., Utah.

Area of Occupancy: 6-25 4-km2 grid cells
Area of Occupancy Comments:  

Number of Occurrences: 6 - 20
Number of Occurrences Comments: Between 6 and 8 populations (USFWS 2006, SEINET 2015).

Population Size Comments: Total population is less than 1000 individuals (four small, isolated populations).

Number of Occurrences with Good Viability/Integrity: Unknown

Overall Threat Impact: Very high
Overall Threat Impact Comments: Urban and agricultural development and grazing (species is extremely palatable to both wildlife and livestock). Development around some sites may impact pollinator abundance and although this species can self fertilize, seed set is much lower than when cross pollinated (Breinholt et al. 2009).

Short-term Trend Comments: In 2001, 1,000 plants were counted and in 2006, 4,205 plants were found.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Endemic to a single geological formation in one area of Washington Co., Utah.

U.S. States and Canadian Provinces

Due to latency between updates made in state, provincial or other NatureServe Network databases and when they appear on NatureServe Explorer, for state or provincial information you may wish to contact the data steward in your jurisdiction to obtain the most current data. Please refer to our Distribution Data Sources to find contact information for your jurisdiction.
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States UT

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
UT Washington (49053)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
15 Upper Virgin (15010008)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: Perennial plant (20-45 cm tall), with stems erect or ascending with purplish or pink purple flowers. Variety is found in the Chinle Formation, Washington Co. Although taxonomy is questionable, subterranean caudices, fistulose stems, and other features seem to support taxonomic distinction (Welsh 1986).
Duration: PERENNIAL
Habitat Comments: Gypsiferous substrates, in "boils" on the Chinle Formation (Welsh et al. 2003).
Economic Attributes
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Economically Important Genus: Y
Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank) Not yet assessed
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Authors/Contributors
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NatureServe Conservation Status Factors Edition Date: 10Nov2015
NatureServe Conservation Status Factors Author: J. Snyder (1997), rev. L. Morse (2001), rev. A. Treher (2015)

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Armstrong, L., and K.T. Harper. 1991. Astragalus holmgreniorum and Astragalus ampullarius status report. Unpublished report on file with the BLM, Salt Lake City, Utah. 13 pp + appendices.

  • Breinholt, J.W., R. Van Buren, O.R. Kopp, and C.L. Stephen. 2009. Population genetic structure of an endangered Utah endemic, Astragalus ampullarioides (Fabaceae). American Journal of Botany 96(3):661?667.

  • Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii). Monte L. Bean Life Science Museum, Brigham Young University; MLBM Press, Provo, Utah. 1007 pp.

  • Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.

  • Southwest Environmental Information Network (SEINet). 2015. Collections Databases. Online. Available: http://swbiodiversity.org/seinet/. Acessed 2015.

  • U.S. Fish and Wildlife Service (USFWS). 2006. Astragalus holmgreniorum (Holmgren milk-vetch) and Astragalus ampullarioides (Shivwits milk-vetch) five year recovery plan. U.S. Fish and Wildlife Service, Denver, Colorado. xi + 106 pp

  • Van Buren, R. 1992. Astragalus Species, Field Report 1992. Unpublished report on file with the BLM, Salt Lake City, Utah. 11 pp + appendices.

  • Welsh, S.L. 1986. New taxa in miscellaneous families from Utah. Great Basin Naturalist 46(2): 261-264.

  • Welsh, S.L., N.D. Atwood, S. Goodrich and L.C. Higgins. (Eds.) 2003. A Utah Flora. 3rd edition. Brigham Young University, Provo, Utah, U.S.A. 912 pp.

  • 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.

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