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Montana Field Guide

Montana Field Guides

Woolly Fleabane - Erigeron lanatus

Potential Species of Concern

Global Rank: G4
State Rank: S3S4
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 9

External Links






State Rank Reason (see State Rank above)
Only known in Montana from a few occurrences in Glacier National Park, though the high elevation habitat as well as the occurrences all being within the Park boundary greatly diminish the potential for negative impacts. The likelihood of additional occurrences being located appears good.
  • Details on Status Ranking and Review
    Woolly Fleabane (Erigeron lanatus) Conservation Status Review
    Review Date = 11/01/2012
    View State Conservation Rank Criteria
    Population Size

    Score2 - Small: Generally 2,000-10,000 individuals.

    Range Extent

    Score2 - Regional or State Endemic or Small Montana Range: Generally restricted to an area <100,000 sq. miles (equivalent to 2/3 the size of Montana or less) or Montana contributes 50% or more of the species’ range or populations OR limited to 2-3 Sub-basins in Montana.

    Area of Occupancy

    Score2 - Low: Generally occurring in 4-10 Subwatersheds (6th Code HUC’s).

    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).

    Trends

    ScoreNA - Rank factor not assessed.

    CommentTrends unknown, though populations are likely stable or experiencing only minor declines.

    Threats

    Score0-1 - Low to Medium.

    Intrinsic Vulnerability

    Score0-1 - Low to Moderate Vulnerability.

    Raw Conservation Status Score

    Score 7 to 9 total points scored out of a possible 16 (Rarity factors and threats only).

 
General Description
Fibrous-rooted perennial from a slender-branched caudex. Stems ascending to erect, 3–10 cm, scapose. Herbage villous, minutely glandular above. Leaves basal and cauline; blades linear-oblanceolate to spatulate, 1–3 cm long, entire or 1- to 3-lobed at the tip. Heads radiate, solitary. Involucres hemispheric, 8–12 mm high; phyllaries in 2 or 3 series, shaggy wooly-villous, purple-tipped, minutely glandular. Rays 30 to 80, white to purplish; ligules 7–8 mm long. Disk corollas 4–5 mm long. Achenes 3–4 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Flathead and Glacier counties; BC, AB, sporadically south to CO (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 13

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

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Limestone talus slopes in the alpine zone.

References
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Citation for data on this website:
Woolly Fleabane — Erigeron lanatus.  Montana Field Guide.  .  Retrieved on , from