Sphaeromeria capitata - Nutt.
Rock-tansy
Other English Common Names: Cluster-head Chicken-sage
Other Common Names: rock tansy
Synonym(s): Artemisia capitata (Nutt.) S. Garcia, Garnatje, McArthur, Pellicer, S.C. Sand. & Vallès-Xirau ;Tanacetum capitatum (Nutt.) Torr. & Gray
Taxonomic Status: Accepted
Related ITIS Name(s): Sphaeromeria capitata Nutt. (TSN 38432)
Unique Identifier: ELEMENT_GLOBAL.2.138260
Element Code: PDAST8S030
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 capitata
Conservation Status
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NatureServe Status

Global Status: G4
Global Status Last Reviewed: 22Oct2015
Global Status Last Changed: 22Oct2015
Ranking Methodology Used: Ranked by inspection
Rounded Global Status: G4 - Apparently Secure
Reasons: Sphaeromeria capitata is known from Wyoming, Montana, Colorado and Utah. There are at least 46 documented occurrences, however, the documented number of occurrences from Wyoming and Colorado is not known.
Nation: United States
National Status: N4

U.S. & Canada State/Province Status
United States Colorado (S1), Montana (S4), Utah (S1), Wyoming (S3)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: This species is known from Wyoming, southwestern Montana, northwestern Colorado, and disjunct onto the Utah Plateaus in Garfield Co, Utah (Cronquist et al. 1994, USDA NRCS 2012).

Number of Occurrences:  
Number of Occurrences Comments: Utah NHP (1998) reports five occurrences. There are over 25 occurrences in Montana (MNHP 1998). It is estimated that there are between 20-100 occurrences in Wyoming based on the state rank of S3. Similarly Colorado NHP ranks this species an S1 implying there are between 1-6 occurrences in the state.

Population Size Comments: Several hundred thousands plants estimated in Montana alone.

Overall Threat Impact Comments: Threats to the species' viability in Montana are minimal.

Environmental Specificity Comments: Large areas of intact habitat exist in Montana.

Other NatureServe Conservation Status Information

Distribution
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Global Range: This species is known from Wyoming, southwestern Montana, northwestern Colorado, and disjunct onto the Utah Plateaus in Garfield Co, Utah (Cronquist et al. 1994, USDA NRCS 2012).

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

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

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
CO Moffat (08081)*
MT Beaverhead (30001), Big Horn (30003), Carbon (30009), Madison (30057)
UT Garfield (49017)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
10 Red Rock (10020001)+, Beaverhead (10020002)+, Clarks Fork Yellowstone (10070006)+, Big Horn Lake (10080010)+, Shoshone (10080014)+
14 Vermilion (14040109)+*, Little Snake (14050003)+*, Paria (14070007)+
16 East Fork Sevier (16030002)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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General Description: Sphaeromeria capitata is a densely caespitose, perennial herb, up to 12 cm tall, with yellow flowers.  The flower heads are solitary and on the ends of subscapose branches.  Leaves are mainly basal, 4-10 mm long, with narrow linear lobes.  Cauline leaves are entire and reduced upward.
Habitat Comments: Found on dry, rocky hills (Cronquist 1994), in silt loam soils. Associated species are Haplopappus, Cryptantha, Agropyron, and Eriogonum (Colorado National Heritage Program 1996). Local, desert flats (Weber 1996) with bristlecone pine, ponderosa pine, and pinyon-juniper on Cedar Breaks limestone, at ca 2350-2380 [Utah] (Welsh et al. 1993). Found on the Laney member of the Green River Formation (Colorado Natural Heritage Program 1996).
Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation
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Minimum Criteria for an Occurrence: A natural occurrence of one or more plants.
Separation Barriers: EOs are separated by either: 1 kilometer or more across unsuitable habitat or altered and unsuitable areas; or 2 kilometers or more across apparently suitable habitat not known to be occupied.
Separation Distance for Unsuitable Habitat: 1 km
Separation Distance for Suitable Habitat: 2 km
Separation Justification: The rationale for this large a separation distance across suitable but apparently unoccupied habitat is that it is likely additional research will find this habitat to be occupied. It can often be assumed that apparently unconnected occurrences will eventually be found to be more closely connected. No information on mobility of pollen and propagules is available on which to base the separation distance for this taxon.
Date: 20Jun2002
Author: Ben Franklin
Population/Occurrence Viability
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Excellent Viability: SIZE: There are no quantitative data available for this species. CONDITION: The occurrence has an excellent likelihood of long-term viability as evidenced by the presence of multiple age classes and evidence of flowering and fruiting, indicating that the reproductive mechanisms are intact. This occurrence should be in a high-quality site with less than 1% cover of exotic plant species and/or no significant anthropogenic disturbance. LANDSCAPE CONTEXT: The occurrence is surrounded by an area that is unfragmented and includes the ecological processes needed to sustain this species.
Good Viability: SIZE: There are no quantitative data available for this species. CONDITION: There are no quantitative data available for this species. LANDSCAPE CONTEXT: The occurrence should have a good likelihood of long-term viability as evidenced by the presence of multiple age classes and evidence of flowering and fruiting, indicating that the reproductive mechanisms are intact. Anthropogenic disturbance within the occurrence is minimal. If exotic species are present, they comprise less than 10% of the total ground cover.
Fair Viability: SIZE: The surrounding landscape should contain the ecological processes needed to sustain the occurrence but may be fragmented and/or impacted by humans. CONDITION: There are no quantitative data available for this species. LANDSCAPE CONTEXT: The occurrence may be less productive than the above situations, but is still viable, with multiple age classes and evidence of flowering and fruiting, indicating that the reproductive mechanisms are intact. The occupied habitat is somewhat degraded (exotic plant species make up between 10-50% of the total ground cover and/or there is a moderate level of anthropogenic disturbance).
Poor Viability: SIZE: There may be significant human disturbance, but the ecological processes needed to sustain the species are still intact. CONDITION: There are no quantitative data available for this species. LANDSCAPE CONTEXT: Little or no evidence of successful reproduction is observed (poor seedling recruitment, no flowering or fruiting observed, or poor age class distribution). Exotic plant species make up greater than 50% of the total ground cover, and/or there is a significant level of human disturbance.
Justification: SIZE: Large populations in high quality sites are presumed to contain a high degree of genetic variability, to have a low susceptibility to the effects of inbreeding depression, and to be relatively resilient. EOs not meeting "C"-rank criteria are likely to have a very high probability of inbreeding depression and extirpation due to natural stochastic processes and/or occur in degraded habitat with low long-term potential for survival. CONDITION: Large populations in high quality sites are presumed to contain a high degree of genetic variability, to have a low susceptibility to the effects of inbreeding depression, and to be relatively resilient. EOs not meeting "C"-rank criteria are likely to have a very high probability of inbreeding depression and extirpation due to natural stochastic processes and/or occur in degraded habitat with low long-term potential for survival. LANDSCAPE CONTEXT: Large populations in high quality sites are presumed to contain a high degree of genetic variability, to have a low susceptibility to the effects of inbreeding depression, and to be relatively resilient. EOs not meeting "C"-rank criteria are likely to have a very high probability of inbreeding depression and extirpation due to natural stochastic processes and/or occur in degraded habitat with low long-term potential for survival.
Key for Ranking Species Element Occurrences Using the Generic Approach (2008).
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: 02Nov1998
NatureServe Conservation Status Factors Author: Fayette, Kim
Element Ecology & Life History Author(s): rev. SSP (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
  • Ackerfield, J. 2011. The Flora of Colorado. Plant Identification BZ 223. Colorado State University Herbarium, Ft. Collins, CO.

  • Colorado Natural Heritage Program. 1996. Biological Conservation Datasystem: Element Occurrence Records.

  • Cronquist, A., A. H. Holmgren, N. H. Holmgren, J. L. Reveal, P. K. Holmgren. 1994. Intermountain Flora Vascular Plants of the Intermountain West, USA: Vol. 5. New York Botanical Garden, Bronx, NY.

  • Cronquist, A., A. H. Holmgren, N. H. Holmgren, J. L. Reveal, and P. K. Holmgren. 1994. Intermountain flora: Vasculr plants of the Intermountain West, U.S.A., Volume 5. The New York Botanical Garden, Bronx, NY.

  • Flora of North America Editorial Committee. 2006a. Flora of North America North of Mexico. Vol. 19. Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. Oxford University Press, New York. xxiv + 579 pp.

  • 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. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • USDA, NRCS. 2013. The PLANTS Database. National Plant Data Team, Greensboro, NC 27401-4901 USA.

  • Weber, W. A. and R. C. Wittmann. 2012. Colorado Flora, Western Slope, A Field Guide to the Vascular Plants, Fourth Edition. Boulder, Colorado. 532 pp.

  • Weber, W.A. and Ronald Wittmann. 1996. Colorado Flora: Western Slope. University Press of Colorado.

  • Weber, W.A., and R.C. Wittmann. 1996b. Colorado flora: Western slope. Univ. Press of Colorado, Niwot, Colorado. 496 pp.

  • Welsh, S.L, N.D. Atwood, S. Goodrich, and L.C. Higgins. 1993. A Utah Flora, second edition, revised. Brigham Young University, Provo, UT.

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