Pyrrocoma radiata - Nutt.
Snake River Goldenweed
Synonym(s): Haplopappus carthamoides var. maximus Gray ;Haplopappus radiatus (Nutt.) Cronq.
Taxonomic Status: Accepted
Related ITIS Name(s): Pyrrocoma radiata Nutt. (TSN 504703)
Unique Identifier: ELEMENT_GLOBAL.2.153204
Element Code: PDASTDT0G0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Aster Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Asterales Asteraceae Pyrrocoma
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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: Pyrrocoma radiata
Taxonomic Comments: USFWS treats as Haplopappus radiatus.
Conservation Status
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NatureServe Status

Global Status: G3
Global Status Last Reviewed: 09Jul2007
Global Status Last Changed: 13May1998
Rounded Global Status: G3 - Vulnerable
Reasons: Known from sixty-nine total occurrences in a restricted range. Threatened by overgrazing, which has caused mass introduction of annual grasses. Damage from grasshoppers is also important. Also threatened by land management and development. Most of the populations occur on federal lands.
Nation: United States
National Status: N3

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 Idaho (S3), Oregon (S3)

Other Statuses

NatureServe Global Conservation Status Factors

Range Extent Comments: Endemic to the lower confines of the Snake River Canyon and adjacent slopes of Baker and perhaps Malheur Counties, Oregon and Washington County, Idaho (Meinke, 1982). Oregon's range about 630 sq. km.

Area of Occupancy: 26-2,500 4-km2 grid cells
Area of Occupancy Comments: In Oregon, estimated at 8 sq. km.

Number of Occurrences: 21 - 80
Number of Occurrences Comments: Known from sixty-nine occurrences (twenty-two in Idaho and forty-seven in Oregon) (FWS, 1995).

Population Size Comments: In Idaho, the total number of individuals is approximately 35,000 with half that number occurring at a single site. In Oregon, the total number of individuals is approximately 100,000 (FWS, 1995).

Number of Occurrences with Good Viability/Integrity: Few (4-12)
Viability/Integrity Comments: Ten occurrences in Oregon are considered of good to excellent viability.

Overall Threat Impact: Medium
Overall Threat Impact Comments: Primarily inadequate reproduction, widespread damage from grasshoppers, and adverse impacts of overgrazing which have resulted in the mass introduction of competitive annual grasses (Meinke, 1982). Other land management or development activities pose threats, such as conversion of land to agriculture, water level fluctuations at Brownlee Reservoir, road construction and maintenance, and mining operations (FWS, 1995).

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

Long-term Trend: Unknown

Environmental Specificity: Unknown

Other NatureServe Conservation Status Information

Distribution
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Global Range: Endemic to the lower confines of the Snake River Canyon and adjacent slopes of Baker and perhaps Malheur Counties, Oregon and Washington County, Idaho (Meinke, 1982). Oregon's range about 630 sq. km.

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 ID, OR

Range Map
No map available.


U.S. Distribution by County Help
State County Name (FIPS Code)
ID Payette (16075), Washington (16087)
OR Baker (41001), Malheur (41045)
* Extirpated/possibly extirpated
U.S. Distribution by Watershed Help
Watershed Region Help Watershed Name (Watershed Code)
17 Middle Snake-Payette (17050115)+, Willow (17050119)+, Payette (17050122)+, Weiser (17050124)+, Brownlee Reservoir (17050201)+, Burnt (17050202)+
+ Natural heritage record(s) exist for this watershed
* Extirpated/possibly extirpated
Ecology & Life History
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Basic Description: Herbaceous perennial from a woody taproot.
General Description: Large herbaceous perennial Happlopappus, mostly glabrous, having clasping stem leaves and large, yellow headed flowers which occurs in bunchgrass habitats.
Technical Description: Herbaceous perennial from a woody taproot, mostly glabrous throughout, 3-10 dm tall; basal leaves broadly elliptic, 5-20 cm wide, 15-50 cm long; cauline leaves numerous, usually sessile with clasping base, toothed, 3-12 cm long, 1-6 cm wide; heads one to twelve, usually in corymbose inflorescence, 3-5 cm wide; bracts pale margined, loose; ray and disc florets yellow, ray florets 17-50, disc florets numerous, 80-100 or more; achenes elongate. (Findley 1992)
Habitat Comments: A grazing-modified sagebrush/grassland community. Usually a specific soil type that is slightly to very calcareous and often overlays a shale formation (FWS, 1995). Steep, rocky hillsides (Idaho Native Plant Society, 1991). Associated species include Poa sandbergii, Crepis occidentalis, Bromus tectorum, Gutierrezia sarothrae, Cardaria draba, Artemisia tridentata, Erigeron pumilus, and Astragalus purshii (Meinke, 1982).
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: 06May1998
NatureServe Conservation Status Factors Author: GRIES, D., rev. S. Vrilakas (2006)

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
  • Idaho Native Plant Society. 1991. Federal candidate (C1 and C2) and listed rare plants of Idaho. unpaginated.

  • 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.

  • Kartesz, J.T., and R. Kartesz. 1980. A synonymized checklist of the vascular flora of the United States, Canada and Greenland. Vol. 2. The biota of North America. Univ. of North Carolina Press, Chapel Hill. 500 pp.

  • Kaye, T., S. Massey, W. Messinger, R. Meinke, T. Magee. 1990. HAPLOPAPPUS RADIATUS, Inventory and Cytogeographic Survey. ODA & BLM unpublished report. 34 pp.

  • Meinke, R.J. 1978. Notes on the rare, threatened, & endangered vascular plants of northeast Oregon, in Baker Co. & adj areas 1976-1978. Baker District, BLM, Baker.

  • Meinke, R.J. 1982. Threatened and Endangered Vascular Plants of Oregon: An Illustrated Guide. U.S. Fish and Wildlife Service, Region 1, Portland, Oregon. 326 pp.

  • U.S. Fish and Wildlife Service (USFWS). 1995. Category and Listing Priority Form.

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