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Montana Field Guide

Montana Field Guides

Fan-leaved Fleabane - Erigeron flabellifolius

Species of Concern

Global Rank: G3
State Rank: S3
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank: 3
C-value:

External Links






State Rank Reason (see State Rank above)
Restricted to rocky, alpine habitats in the mountains of south-central Montana. Though uncommon and restricted in distribution, the high elevation habitat tends to reduce the potential for any impacts to the species.
  • Details on Status Ranking and Review
    Fan-leaved Fleabane (Erigeron flabellifolius) Conservation Status Review
    Review Date = 06/11/2012
    View State Conservation Rank Criteria
    Population Size

    Score1-2 - Small to Moderate. Population size is imprecisely known but is believed to be >2,000 individuals and <100,000 individuals.

    Range Extent

    Score3 - Local Endemic or Very Small Montana Range: Generally restricted to an area <10,000 sq. miles (equivalent to the combined area of Phillips and Valley Counties) or <6 Sub-basins (4th code watersheds) Range-wide OR limited to one Sub-basin in Montana

    Area of Occupancy

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

    Environmental Specificity

    Score1-2 - Moderate to High.

    Trends

    Score0-1 - Stable to Minor Declines:

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

    Threats

    Score0-1 - Low to Medium.

    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.

    Raw Conservation Status Score

    Score 8 to 12 total points scored out of a possible 19.

 
General Description
Taprooted perennial with a slender-branched caudex. Stems erect, 2–10 cm. Herbage minutely glandular. Leaves basal and cauline; blades cuneate to oblanceolate, 1–3 cm long, shallowly divided into crowded, ovate, sometimes dentate, ultimate lobes, less divided above. Heads solitary, radiate. Involucres campanulate to hemispheric, 7–10 mm high; phyllaries in 2 to 3 series, glandular, purplish. Rays 50 to 70, white; ligules 5–9 mm long. Disk corollas 4–5 mm long. Achenes ca. 2 mm long; pappus in 1 series (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Phenology
Flowering in July and August.

Species Range
Present
 


Range Comments
Regional endemic of SW Montana and NW Wyoming.

Summary of Observations Submitted for Montana
Number of Observations: 30

(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
Gravelly soil or talus in the subalpine and alpine zones.

Ecological Systems Associated with this Species

References
  • Additional ReferencesLegend:   View Online Publication
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    • Fertig, W. and M. Bynum. 1994. Biological report on the proposed Twin Lakes Research Natural Area. Unpublished report to the Shoshone National Forest. Wyoming Natural Diversity Database, Laramie, Wyoming. 33 pp. plus appendices.
    • Lesica, P. 1993. Vegetation and flora of the Line Creek Plateau area, Carbon County, Montana. Unpublished report to USDA Forest Service, Intermountain Research Station. Montana Natural Heritage Program, Helena, Montana. 30 pp.
    • 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. 1994. Sensitive plant surveys in the Gallatin National Forest, Montana. Unpublished report to the Gallatin National Forest. Montana Natural Heritage Program, Helena, MT. 54 pp.
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Citation for data on this website:
Fan-leaved Fleabane — Erigeron flabellifolius.  Montana Field Guide.  .  Retrieved on , from