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Montana Field Guide

Montana Field Guides

Slender Fleabane - Erigeron gracilis


Global Rank: G4
State Rank: S4
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 6

External Links






State Rank Reason (see State Rank above)
See rank details.
  • Details on Status Ranking and Review
    Slender Fleabane (Erigeron gracilis) Conservation Status Review
    Review Date = 03/12/2013
    View State Conservation Rank Criteria
    Population Size

    Score1 - Moderate: Generally 10,000-100,000 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

    Score1 - Moderate: Generally occurring in 11-25 Subwatersheds (6th Code HUC’s).

    Environmental Specificity

    Score0-1 - Low to Moderate.

    Trends

    ScoreNA - Rank factor not assessed.

    Threats

    Score0-1 - Low to Medium.

    Intrinsic Vulnerability

    Score0 - Low Vulnerability: Species does not have any unusual or specific life history or biological attributes or limted reproductive potential which makes it susceptible to extirpation from stochastic events or other adverse impacts to its habitat and thus slow to recover.

    Raw Conservation Status Score

    Score 4 to 6 total points scored out of a possible 16 (Rarity factors and threats only)

 
General Description
Fibrous-rooted perennial from slender branched caudex. Stems ascending, 5–20 cm. Herbage sparsely strigose, eglandular. Leaves basal and cauline; blades linear to linear-oblanceolate, entire, 1–8 cm long, becoming linear-lanceolate above. Heads radiate, solitary. Involucres hemispheric, 5–8 mm high; phyllaries in 2 or 3 series, strigose, eglandular. Rays 40 to 100, blue or purple; ligules 5–12 mm long. Disk corollas 3–5 mm long. Achenes ca. 2 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
Endemic to southwest MT and adjacent ID and WY (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 41

(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
Meadows, grasslands, sagebrush steppe and rocky slopes primarily in the subalpine zone.

References
  • Additional ReferencesLegend:   View Online Publication
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    • 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., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • 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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Citation for data on this website:
Slender Fleabane — Erigeron gracilis.  Montana Field Guide.  .  Retrieved on , from