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Montana Field Guide

Montana Field Guides

Lackschewitz' Fleabane - Erigeron lackschewitzii

Species of Concern

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

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

External Links






State Rank Reason (see State Rank above)
Endemic to Montana and adjacent Alberta though the large majority of the species' range is in Montana. Though many of the individual occurrences are small in size, the species is distributed over a relatively wide area along the Rocky Mtn Front south to the Flint Creek Range. The high elevation habitat reduces the potential for detrimental impacts.
  • Details on Status Ranking and Review
    Lackschewitz' Fleabane (Erigeron lackschewitzii) Conservation Status Review
    Review Date = 05/03/2013
    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

    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

    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 5 to 8 total points scored out of a possible 16 (Rarity factors and threats only).

 
General Description
Lackschewitz' Fleabane is a taprooted perennial with a simple or sparingly-branched rootcrown and curved, unbranched stems that are 3-8 cm high. The basal leaves are 2-6 cm long and narrowly spoon-shaped with pointed tips. The 5-10 stem leaves are gradually reduced upwards. Foliage is sparsely to densely covered with long white hairs. The solitary flower heads are 10-15 mm wide, and the involucral bracts are green, 6-8 mm long, and densely covered with long, white hairs and sessile glands. The 30-70 blue rays are 8-11 mm long and notched at the tips. The yellow disk corollas are 3-5 mm long. There are 15-24 pappus bristles at the top of the achenes. (Montana Natural Heritage Program, 1999).

Phenology
Flowering in July-early August, fruiting late July.

Diagnostic Characteristics
This species is very easily confused with some forms of Erigeron ochroleucus variety scribneri as well as Erigeron grandiflorus.

Species Range
Present
 


Range Comments
Montana (Flathead, Lewis and Clark, Pondera, and Teton counties) and Alberta (Waterton Lakes National Park, Sofa Mountain).

Summary of Observations Submitted for Montana
Number of Observations: 62

(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
Open, gravelly, calcareous soil and talus on ridgetops in the alpine and subalpine zones.

Ecological Systems Associated with this Species

References
  • Additional ReferencesLegend:   View Online Publication
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    • Heidel, B.L. 1993. Report on the conservation status of Erigeron lackschewitzii, a candidate threatened species. Unpublished report to U.S. Fish and Wildlife Service. Montana Natural Heritage Program, Helena, MT. 57 pp.
    • Kerstetter, T. 1994. Interim report on the taxonomy of Erigeron lackschewitzii. Unpublished report to the Montana Natural Heritage Program, Helena, MT. 16 pp.
    • Kerstetter, T.A. 1993. Preliminary report on taxonomy of Erigeron lackschewitzii. Unpublished report to U.S. Fish and Wildlife Service. Montana Natural Heritage Program, Helena, MT. 12 pp.
    • Kerstetter, T.A. 1994. Taxonomic investigation of Erigeron lackschewitzii. M.S. thesis. Montana State University, Bozeman, Montana. 90 pp.
    • Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Nesom, Guy L. 2004. Taxonomic Reevaluations in North American Erigeron (Asteraceae: Astereae). SIDA 21(1): 19–39.
    • Nesom. GL and WA. Webe. 1983. A new woolly-headed, Monocephalous erigeron (Asteraceae) from Montana. Madrono 30:245-249
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Citation for data on this website:
Lackschewitz' Fleabane — Erigeron lackschewitzii.  Montana Field Guide.  .  Retrieved on , from