Sphaeromeria argentea - Nutt.
Nuttall's False Sagebrush
Other English Common Names: Silver Chicken-sage
Other Common Names: silver chickensage
Synonym(s): Artemisia macarthuri S. Garcia, Garnatje, Pellicer, S.C. Sand. & Vallès-Xirau ;Tanacetum nuttallii Torr. & Gray
Taxonomic Status: Accepted
Related ITIS Name(s): Sphaeromeria argentea Nutt. (TSN 38430)
Unique Identifier: ELEMENT_GLOBAL.2.130583
Element Code: PDAST8S010
Informal Taxonomy: Plants, Vascular - Flowering Plants - Aster Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Asterales Asteraceae Sphaeromeria
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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: Sphaeromeria argentea
Taxonomic Comments: Sphaeromeria argentea is not mentioned in Harrington (1954), Abrams (1944) or Welsh et al. (1973). It is a synonym in Hitchcock and Cronquist (1973) and Dorn (1977).  Garcia et al. (2011) found the genus Sphaeromeria should be merged into Artemisia and published the new name Artemisia macarthuri for this taxon (necessary since the "argentea" specific epithet is already in use in Artemisia).
Conservation Status
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NatureServe Status

Global Status: G3G4
Global Status Last Reviewed: 27Jun2000
Global Status Last Changed: 27Jun2000
Rounded Global Status: G3 - Vulnerable
Reasons: Rare throughout its range.
Nation: United States
National Status: N3N4

U.S. & Canada State/Province Status
United States Colorado (S1), Idaho (SNR), Montana (S2S3), Nevada (S1?), Wyoming (S3)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Regional endemic known from Point of Rocks spring in Nevada; southwestern Beaverhead Co. in Montana, Idaho, Wyoming, Colorado.

Number of Occurrences: 21 to >300
Number of Occurrences Comments: There are 13 EOs in Montana (1999), over 50 in Wyoming, considered S1S3 in Nevada.

Population Size Comments: Rare in Nevada; estimated at 7,500-20,000 in Montana occupying less than 200 acres.

Overall Threat Impact Comments: Few immediate threats, potentially impacted by mining, OHV use and noxious weeds.

Short-term Trend: Unknown
Short-term Trend Comments: Unknown.

Intrinsic Vulnerability Comments: The dry, rocky habitat is resilient.

Other NatureServe Conservation Status Information

Distribution
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Global Range: Regional endemic known from Point of Rocks spring in Nevada; southwestern Beaverhead Co. in Montana, Idaho, Wyoming, Colorado.

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

U.S. & Canada State/Province Distribution
United States CO, ID, MT, NV, WY

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
CO Moffat (08081)
MT Beaverhead (30001)
NV Nye (32023)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
10 Red Rock (10020001)+, Beaverhead (10020002)+
14 Vermilion (14040109)+, Little Snake (14050003)+*
16 Diamond-Monitor Valleys (16060005)+, Ralston-Stone Cabin Valleys (16060011)+*
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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General Description: Chicken sage is a mat-forming perennial herb or sub-shrub with multiple flowering shoots that are 5-20 cm high and many shorter, sterile shoots. The alternate leaves are up to 15 mm long and are narrowly fan-shaped and usually 3-lobed at their tip. They are aromatic and densely covered with appressed, gray hair. Several short-stalked, globose flower heads are borne at the stem tips. Each head has numerous disk flowers and 2-3 series of overlapping, membranous-margined involucral bracts that are 3-4 mm high. There are no ray flowers, and the achenes lack a pappus.
Diagnostic Characteristics: The leaves, heads, and subshrub habit make this plant resemble a tiny sagebrush, while S. CAPITATA forms dense mats and has more deeply divided leaves and dense clusters of flower heads.
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: 29Sep1993
NatureServe Conservation Status Factors Author: Stoner, N.; rev. C. Annable (1993), B. Heidel (1999).
Element Ecology & Life History Edition Date: 08Dec1994
Element Ecology & Life History Author(s): JM

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
  • Garcia, S., T. Garnatje, E.D. McArthur, J. Pellicer, S.C. Sanderson, and J. Vallès. 2011. Taxonomic and nomenclatural rearrangements in Artemisia subgen. Tridentatae, including a redefinition of Sphaeromeria (Asteraceae, Anthemideae). Western North American Naturalist. 71(2):158-163.

  • Kartesz, J. T. 1991. Synonym names from 1991 checklist, as extracted by Larry Morse, TNC, June 1991.

  • 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.

  • Vanderhorst, J. 1995a. Sensitive plant survey in the Horse Prairie Creek drainage, Beaverhead County, Montana. Unpublished report to the Bureau of Land Management, Butte District. Montana Natural Heritage Program, Helena, Montana. 42 pp. plus appendices.

  • Vanderhorst, J. 1995c. Survey of Bannack State Park and vicinity for Montana plant species of special concern. Unpublished report to Bannack State Park, Montana Department of Fish, Wildlife, and Parks. Montana Natural Heritage Program, Helena, MT. 43 pp.

  • Vanderhorst, J. P. and P. Lesica. 1994. Sensitive plant survey in the Tendoy Mountains, Beaverhead County, Montana. Unpublished report to the Bureau of Land Management, Butte District. Montana Natural Heritage Program, Helena, MT. 59 pp. plus appendices.

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