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Montana Animal Field Guide

Montana Field Guides

Whitestem Goldenbush - Ericameria discoidea var. discoidea
Other Names:  Haplopappus macronema var. macronema

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Species of Concern

Global Rank: G4G5T4
State Rank: S2
* (see State Rank Reason below)

Agency Status
USFWS:
USFS: SENSITIVE
BLM:
MNPS Threat Rank: 3

External Links






State Rank Reason (see State Rank above)
Rare in Montana where it is only known from a couple of sites in the southwest corner of the state. Population levels are poorly documented. One site is relatively inaccessible and not likely to be threatened by human impacts.
  • Details on Status Ranking and Review
    Whitestem Goldenbush (Ericameria discoidea var. discoidea) Conservation Status Review
    Review Date = 05/06/2013
    Population Size

    Score3 - Vey Small: Generally <2,000 individuals.

    Comment

    Range Extent

    Score1 - Peripheral, Disjunct or Sporadic Distribution in MT: Widespread species that is peripheral, disjunct or sporadically distributed within MT such that it occurs in <5% of the state (<7,500 sq. miles or the combined area of Beaverhead and Ravalli Counties) or is restricted to 4-5 sub-basins.

    Comment

    Area of Occupancy

    Score3 - Very Low: Generally occurring in 3 or fewer Subwatersheds (6th Code HUC’s).

    Comment

    Trends

    ScoreNA - Rank factor not assessed.

    Comment

    Threats

    Score0-1 - Low to Medium.

    Comment

    Intrinsic Vulnerability

    Score1 - Moderate Vulnerability: Specific biological attributes, unusual life history characteristics or limited reproductive potential makes the species susceptible to extirpation from stochastic events or other adverse impacts to its habitat and slow to recover.

    Comment

    Environmental Specificity

    Score1 - Moderate: Species is restricted to a specific habitat that is more widely distributed or to several restricted habitats and is typically dependent upon relatively unaltered, good-quality habitat (C Values of 5-7).

    Comment

    Raw Conservation Status Score

    Score 9 to 10 total points scored out of a possible 16 (Rarity factors and threats only).

 
General Description
Discoid Goldenweed is a low, rounded shrub with leafy stems that are 15-40 cm tall. Leaves are lance-shaped, widest above the middle, 1-3 cm long, and wavy-margined. The leaves and the inflorescence are glandular, the while stem is densely white-hairy. Flowering heads are borne in clusters of 1-3 at the ends of the branches. The glandular-hairy involucral bracts are 8-15 mm long, and the outer are broader and more leafy than the inner. Ray flowers are lacking. The 10-25 disk flowers are yellow and 8-11 mm long. The achenes have numerous, fine bristles on top.

Phenology
Flowering occurs in late July-August.

Diagnostic Characteristics
Few other Montana shrubs in the Aster family have stems that are covered with white, felt-like hair. Chrysothamnus parryi and C. nauseosus (rabbitbrush) usually have fewer than 12 flowers per head and the involucral bracts are arranged in well-defined vertical rows instead of overlapping like shingles as in Haplopappus. The other variety of this species in Montana, Haplopappus macronema var. linearis, has narrower leaves that are 8-20 times as long as wide and lack wavy margins.

Species Occurrences
Number of Species Occurrences: 3
*Not all Species Occurrences are mapped

 


Range Comments
The range of this variety is from se. OR to sw. MT, south to CA and UT. The range of this species as a whole is c. ID, sw MT, south to CA, UT, and CO. Peripheral.

Summary of Observations Submitted for Montana
Number of Observations: 3

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Records associated with a range of dates are excluded from time charts)



Habitat
Haplopappus macronema var. macronema grows in rocky, open, sparsely wooded slopes or coarse talus near or above treeline. In the Pioneer Mountains, it grows at about 7600 feet on a south-facing talus slope with scattered whitebark pine, sagebrush, delphinium and gooseberry.

Ecological Systems Associated with this Species

Ecology
Plants of discoid goldenweed grow in partial shade but are usually associated with sparse vegetation. Seedlings may not be able to establish in dense vegetation.

Management
There are no documented threats to the population in the Pioneer Mountains.

References
  • Additional ReferencesLegend:   View WorldCat Record   View Online Publication
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    • Hall, H. M. 1928. The genus HAPLOPAPPUS, a phylogenetic study in the compositae. Carnegie Institution of Washington Publication No. 389, Washington D.C. 391 pp.
    • Lesica, P. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX.
    • Lesica, P. 1992. Vascular plant and sensitive plant species inventory for the Highland Mountains, Deerlodge National Forest. Unpublished report prepared for the Deerlodge National Forest. Montana Natural Heritage Program, Helena, MT. 21 pp. plus appendices, photographs.
    • Lesica, P. 1994. Sensitive plant survey of BLM Lands along the Big Hole River and in the Whitehall Valley. Montana Natural Heritage Program, Helena, MT. 13 pp.
    • Schassberger, L. A. 1991. Rare plant inventory of the East Pioneer Mountains. Prepared for the USDA Forest Service, Region 1, Beaverhead National Forest. Montana Natural Heritage Program, Helena, MT. 55 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.
    • Winkler, G. 1987. Montana CHRYSOTHAMNUS. M.S. thesis. Montana State University, Bozeman. 94 pp.
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Citation for data on this website:
Whitestem Goldenbush — Ericameria discoidea var. discoidea.  Montana Field Guide.  Montana Natural Heritage Program.  Retrieved on November 27, 2014, from http://FieldGuide.mt.gov/speciesDetail.aspx?elcode=PDAST3L0N1
 
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