Symphyotrichum welshii - (Cronq.) Nesom
Welsh's American-aster
Synonym(s): Aster welshii Cronq.
Taxonomic Status: Accepted
Related ITIS Name(s): Symphyotrichum welshii (Cronquist) G.L. Nesom (TSN 522260)
Unique Identifier: ELEMENT_GLOBAL.2.155849
Element Code: PDASTE8380
Informal Taxonomy: Plants, Vascular - Flowering Plants - Aster Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Asterales Asteraceae Symphyotrichum
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Concept Reference
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Concept Reference: 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.
Concept Reference Code: B99KAR01HQUS
Name Used in Concept Reference: Symphyotrichum welshii
Conservation Status
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NatureServe Status

Global Status: G2
Global Status Last Reviewed: 11Nov2013
Global Status Last Changed: 12Feb2001
Ranking Methodology Used: Ranked by calculator
Rounded Global Status: G2 - Imperiled
Reasons: Known from approximately 21 extant occurrences. Predominantly found in southwestern Utah, with a few occurrences found in other areas of Utah, and on Navajo Nation lands in Arizona (Navajo County); additional occurrences may be found in the Navajo Nation with further inventory. Found primarily in hanging gardens of canyonsides and in seepage areas; plants are often locally abundant but are limited by habitat. Threats include the drying up of hanging gardens and indirect impacts of livestock grazing. According to Daniella Roth and the Utah Native Plant Society (in Laurenzi and Spence, 2012), this species is "Probably undercollected and more widespread and in a wider variety of wetland habitats than currently known (not restricted to hanging gardens). Threats prob low overall - many protected."
Nation: United States
National Status: N2

U.S. & Canada State/Province Status
United States Arizona (S1), Navajo Nation (S1), Utah (S2), Wyoming (SNR)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Predominantly found in southwestern Utah (Washington, Iron, Beaver, Piute, Wayne, Garfield, and Kane counties), with few occurrences found in other areas of the state (Utah County and possibly Summit County). Also found on Navajo Nation lands in Arizona (Navajo County).

Number of Occurrences: 6 - 80
Number of Occurrences Comments: Known from approximately 20 extant occurrences in Utah (although 11 of these were last observed in 1986 or earlier) and from 3 occurrences on Navajo Nation lands in Arizona (Navajo County). There are likely more occurrences on the Navajo Nation, particularly in the Tsegi watershed area in Navajo County, where there are many hanging gardens.

Population Size Comments: Plants are locally abundant but limited by habitat.

Number of Occurrences with Good Viability/Integrity: Unknown
Viability/Integrity Comments: The Navajo Nation occurrence has good (but not excellent) viability. Livestock accessibility and the occasional disturbance by flash floods detract from viability, but otherwise plants are abundant, few exotics present and the site is very remote and difficult to access.

Overall Threat Impact: Unknown
Overall Threat Impact Comments: At the Navajo Nation location, plants are to some extent threatened by livestock grazing, but no direct impacts have been observed. According to Daniella Roth (in Laurenzi and Spence 2012), threats are probably low overall, because of many protected sites within hanging gardens.

Intrinsic Vulnerability Comments: Hanging gardens are drying up on the Navajo Nation.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Predominantly found in southwestern Utah (Washington, Iron, Beaver, Piute, Wayne, Garfield, and Kane counties), with few occurrences found in other areas of the state (Utah County and possibly Summit County). Also found on Navajo Nation lands in Arizona (Navajo County).

U.S. States and Canadian Provinces
Color legend for Distribution Map

U.S. & Canada State/Province Distribution
United States AZ, NN, UT, WY

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
AZ Coconino (04005), Navajo (04017)
UT Beaver (49001)*, Garfield (49017), Iron (49021)*, Kane (49025)*, Piute (49031)*, Utah (49049), Washington (49053), Wayne (49055)*
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
14 Fremont (14070003)+*, Escalante (14070005)+, Lower Lake Powell (14070006)+*, Paria (14070007)+, Chinle (14080204)+
15 Lower Colorado-Marble Canyon (15010001)+, Upper Virgin (15010008)+
16 Provo (16020203)+, Middle Sevier (16030003)+*, Escalante Desert (16030006)+*, Beaver Bottoms-Upper Beaver (16030007)+*
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Riverine Habitat(s): SPRING/SPRING BROOK
Palustrine Habitat(s): HERBACEOUS WETLAND, Riparian
Terrestrial Habitat(s): Bare rock/talus/scree
Habitat Comments: In and at the margins of seeps, in wet meadows, and along stream banks, as well as in thin soil of hanging gardens and wet ledges. Substrates include wet sandstone (incl. Navajo Sandstone) and wet limestone; plants may occasionally be removed from rocks by cascading water. 1300 - 2440 m.
Economic Attributes Not yet assessed
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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: 14Dec1998
NatureServe Conservation Status Factors Author: Morse, Larry E. (1998), rev. D. Roth/K. Gravuer (2006), rev. S. Schuetze (2013)

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
  • Cronquist, A. 1994. Asterales. In A. Cronquist, A.H. Holmgren, N.H. Holmgren, J.L. Reveal, and P.K. Holmgren. Intermountain flora: Vascular plants of the Intermountain West, U.S.A. Vol. 5. New York Botanical Garden, Bronx. 496 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.

  • Stone, R.D. 1998. Endemic and rare plants of Utah: an overview of their distribution and status. Prepared for: Utah Reclamation Mitigation and Conservation Commission, U.S. Department of the Interior by Utah Division of Wildlife Resources. 566 pp. + appendices. [http://dwrcdc.nr.utah.gov/ucdc/ViewReports/plantrpt.htm]

  • Utah Native Plant Society. 2003-2006. Utah Rare Plant Guide. Salt Lake City, UT. Online. Available: http://www.utahrareplants.org. (Accessed 2006)

  • 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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