Enceliopsis argophylla - (D.C. Eat.) A. Nels.
Silverleaf Sunray
Other Common Names: silverleaf sunray
Taxonomic Status: Accepted
Related ITIS Name(s): Enceliopsis argophylla (D.C. Eaton) A. Nelson (TSN 37312)
Unique Identifier: ELEMENT_GLOBAL.2.151849
Element Code: PDAST3G010
Informal Taxonomy: Plants, Vascular - Flowering Plants - Aster Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Asterales Asteraceae Enceliopsis
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Concept Reference
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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.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Enceliopsis argophylla
Conservation Status
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NatureServe Status

Global Status: G2
Global Status Last Reviewed: 15Oct2013
Global Status Last Changed: 15Oct2013
Ranking Methodology Used: Ranked by calculator
Rounded Global Status: G2 - Imperiled
Reasons: Enceliopsis argophylla is almost entirely confined to Clark County, Nevada, but extends into the Beaver Dam Mountains in Washington County, Utah, and is found in a restricted area around Lake Mead in Mohave County, Arizona. Rare in Nevada, this species is known from three records of extant occurrences and one extirpated occurrence.

Laurenzi and Spence (2012 report), stated the "Reports for Utah may be based on an erroneous interpretation of the type locality of Palmer from 1870. This specimen was collected somewhere between the Beaver Dam Mountains of Utah or Arizona southwest towards St. Thomas, Nevada. It is only found on gypsum clay knolls and gypsum derived alluvium fans. It is also possible that it was extirpated. More info is needed."

The only threats to this taxon are from recreational use of state and national park lands.

Nation: United States
National Status: N2

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 Arizona (S2), Nevada (S1?), Utah (S1)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Local endemic. Almost entirely confined to Clark County, Nevada, but extending into the Beaver Dam Mountains in Washington County, Utah; reported in northern Arizona only from the Lake Mead area in Mohave County. Mistakenly reported in the Beaver Dam area in Arizona, and along I-15 to the Utah border (these locations are E. nucicalus) (J. Anderson and J. Spence, 2012 AGFD meeting). Erroneously reported in California (Cronquist, Holmgren, Holmgren, Reveal, and Holmgren 1984; McDougall 1973; Kartesz 1999 draft distribution data).

Number of Occurrences: 6 - 20
Number of Occurrences Comments: In Nevada, there are records for three extant occurrences and one extirpated occurrence (Nevada Natural Heritage Program 1999). There are 10 occurrence records in the Lake Mead area, Mohave County, Arizona. What was once thought to be Enceliopsis argophylla up near the Beaver Dam area in Arizona, and along I-15 to the border with Utah are actually E. nudicaulus (John Anderson and John Spence, 2012 Grank meeting at AGFD).

Population Size Comments: Locally common in a restricted range in Arizona, around the Lake Mead area (AGFD 2012).

Number of Occurrences with Good Viability/Integrity: Unknown

Overall Threat Impact: Unknown
Overall Threat Impact Comments: Only known threats are from recreational use of state and national park lands (Jim Morefield, personal communication 1999).

Short-term Trend: Relatively Stable (<=10% change)

Long-term Trend: Unknown

Environmental Specificity: Narrow. Specialist or community with key requirements common.
Environmental Specificity Comments: Clay and gypsum cliffs to gravelly slopes in deserts; dry slopes and sandy washes (Kartesz 1988).

Other NatureServe Conservation Status Information

Distribution
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Global Range: Local endemic. Almost entirely confined to Clark County, Nevada, but extending into the Beaver Dam Mountains in Washington County, Utah; reported in northern Arizona only from the Lake Mead area in Mohave County. Mistakenly reported in the Beaver Dam area in Arizona, and along I-15 to the Utah border (these locations are E. nucicalus) (J. Anderson and J. Spence, 2012 AGFD meeting). Erroneously reported in California (Cronquist, Holmgren, Holmgren, Reveal, and Holmgren 1984; McDougall 1973; Kartesz 1999 draft distribution data).

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 AZ, NV, UT

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
AZ Mohave (04015)
NV Clark (32003)
UT Washington (49053)*
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
15 Lake Mead (15010005)+, Grand Wash (15010006)+, Upper Virgin (15010008)+*, Fort Pierce Wash (15010009)+, Detrital Wash (15010014)+, Havasu-Mohave Lakes (15030101)+*
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Terrestrial Habitat(s): Desert
Habitat Comments: Clay and gypsum cliffs to gravelly slopes in deserts; dry slopes and sandy washes (Kartesz 1988).
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: 04Jun1999
NatureServe Conservation Status Factors Author: Gries, D., rev. S. Schuetze (2012)

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
  • Clark, C. 1998. Phylogeny and adaptation in the Encelia alliance (Asteraceae: Heliantheae). Aliso 17: 89-98.

  • Cronquist, A. 1994. Asterales. Pages 1-496 in: Cronquist, A., A. H. Holmgren, N. H. Holmgren, J. L. Reveal, and P. K. Holmgren. Intermountain flora vol. 5. Bronx: The New York Botanical Garden.

  • Cronquist, A., A.H. Holmgren, N.H. Holmgren, J.L. Reveal, and P.K. Holmgren. 1984. Intermountain Flora: Vascular Plants of the Intermountain West, U.S.A. Vol. 4, Subclass Asteridae (except Asteraceae). New York Botanical Garden, Bronx. 573 pp.

  • Eaton, D. C. 1871. Pages 136-208 in: S. Watson. Botany. In: C. King, Report of the U. S. Geological Exploration of the 40th Parallel. 5: 1-525.

  • Kartesz, J.T. 1988. A flora of Nevada. Ph.D. dissertation. Univ. of Nevada, Reno. 3 volumes. 1729 pp.

  • 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.

  • McDougall, W.B. 1973. Seed plants of northern Arizona. The Museum of Northern Arizona, Flagstaff, Arizona. 594 pp.

  • Nevada Natural Heritage Program. 1998-present. Index to available images (web page). Carson City: Nevada Natural Heritage Program public web site, http://heritage.nv.gov/images.htm.

  • Nevada Natural Heritage Program. 1999. February 19-last update. List of sensitive plants. Online. Available: http://www.state.nv.us/nvnhp/sensplnt.htm. Accessed 1999, June 3.

  • Welsh, S.L., N.D. Atwood, S. Goodrich, and L.C. Higgins (editors). 1993. A Utah flora. Provo, Utah: Brigham Young University Press.

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