Eriogonum argophyllum - Reveal
Ruby Valley Buckwheat
Other English Common Names: Sulphur Hot Springs Buckwheat
Other Common Names: Sulphur Hot Springs buckwheat
Taxonomic Status: Accepted
Related ITIS Name(s): Eriogonum argophyllum Reveal (TSN 21073)
Unique Identifier: ELEMENT_GLOBAL.2.141733
Element Code: PDPGN080K0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Buckwheat Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Polygonales Polygonaceae Eriogonum
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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: Eriogonum argophyllum
Conservation Status
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NatureServe Status

Global Status: G1
Global Status Last Reviewed: 13Dec2010
Global Status Last Changed: 05Sep1990
Rounded Global Status: G1 - Critically Imperiled
Reasons: Known from a single hot spring in Nevada - nearby sites with a similar habitat have been searched without success. Although currently protected through a cooperative agreement with the private landowner, future development is a potential threat. This species grows on a fragile gravel substrate creating by outflow of the main hot spring. Small changes to the water table or disturbances caused by livestock trampling could cause significant population declines.


Nation: United States
National Status: N1

U.S. & Canada State/Province Status
United States Nevada (S1)

Other Statuses

Comments on USESA: This species was considered a candidate for federal listing in the Federal Register dated 12/15/1980. In 2000, the species was reclassified and removed from the candidate list (USFWS 2000). The species is currently not listed. The 2000 Federal Register mentions that the threats of disturbance associated with geothermal or other land or resource development have been eliminated, and that the area has been fenced to protect against off-highway vehicle activity and impacts from livestock. Additionally, the species is protected by the state of Nevada, responsible for monitoring any potentially harmful activities. Therefore, no current and no foreseeable threats can be identified and the continuation of candidate status is not warranted (USFWS 2000).
U.S. Fish & Wildlife Service Lead Region: R8 - California-Nevada

NatureServe Global Conservation Status Factors

Range Extent Comments: Only known to occur in Ruby Valley, Sulphur Hot Springs, Elk County, Nevada.

Area of Occupancy: 1-25 4-km2 grid cells
Area of Occupancy Comments: One 4-sq km grid cell (EO data in the NatureServe central database as of November 2010).

Number of Occurrences: 1 - 5
Number of Occurrences Comments: One known occurrence at Sulphur Hot Springs. Many nearby spots with similar habitat have been searched without success.

Population Size Comments: A USFWS Spotlight Species Action Plan (2009) estimated the population at no more than 2,000 individuals. However, information from more recent population monitoring indicates the population may comprise as many as 3,500 individuals (S. Caicco, pers. comm. 2010). As of 1990, total number of individuals was estimated to range from 3700-5000 (EO data in the NatureServe central database as of November 2010).

Number of Occurrences with Good Viability/Integrity: Very few (1-3)
Viability/Integrity Comments: The only occurrence was given a rank of A (excellent viability) in 1990.

Overall Threat Impact: Very high - medium
Overall Threat Impact Comments: While geothermal development was previously considered a threat, the population is currently protected through a cooperative agreement with the private landowner (S. Caicco, pers. comm. 2010). Previous threats also included livestock trampling and off-road vehicle use; both of these threats were eliminated with the construction of an exclosure fence (USFWS 2000). Although currently protected, future development is a potential threat. Energy development in areas surrounding the population has the potential to alter the hydrology upon which the taxon depends; however, this threat is not imminent. Digging by jackrabbits (a native species) is another potential threat but there is no evidence of a population decline (S. Caicco, pers. comm. 2010).

Intrinsic Vulnerability Comments: Habitat is fragile.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Only known to occur in Ruby Valley, Sulphur Hot Springs, Elk County, Nevada.

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

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

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
NV Elko (32007)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
16 Long-Ruby Valleys (16060007)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: A low perennial herb that forms a mat of white-hairy leaves, about 1-2 dm across. Leafless flowering stems bear terminal clusters of yellow flowers high above the leaf mat. Blooms June-July.
Riverine Habitat(s): SPRING/SPRING BROOK
Terrestrial Habitat(s): Desert, Shrubland/chaparral
Habitat Comments: Crusty, mineralized, sandy soils below a hot spring at 1845 m elevation.
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: 13Dec2010
NatureServe Conservation Status Factors Author: Greene, L., rev. Maybury & reviewed by J. Morefield (1996), rev. A. Frances (2010)

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
  • 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.

  • Mozingo, H.N., and M. Williams. 1980. The threatened and endangered plants of Nevada. U.S. Fish and Wildlife Service and Bureau of Land Management, Portland, OR. 268 pp.

  • U.S. Fish and Wildlife Service (USFWS). 2000. Endangered and Threatened Wildlife and Plants; Notice of Reclassification of Nine Candidate Taxa. Federal Register 65(204): 63044-63047.

  • U.S. Fish and Wildlife Service. 2009. U.S. Fish and Wildlife Service - Spotlight Species Action Plan Eriogonum argophyllum. Accessed online on Dec. 7, 2010 at: http://ecos.fws.gov/docs/action_plans/doc3007.pdf

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