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Montana Field Guide

Montana Field Guides

Alpine Collomia - Collomia debilis var. camporum

Species of Concern

Global Rank: G5T2
State Rank: S1S2
* (see State Rank Reason below)

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

External Links






State Rank Reason (see State Rank above)
Only known from a few sites in western Montana and Lemhi County, Idaho, from low elevation scree, talus or rocky slopes. Negative impacts from human disturbance and weed invasion are possible. Current status of most of the documented locations is not known. Survey and monitoring data are needed.
  • Details on Status Ranking and Review
    Alpine Collomia (Collomia debilis var. camporum) Conservation Status Review
    Review Date = 11/07/2012
    View State Conservation Rank Criteria
    Population Size

    Score2-3 - Very Small to Small: Population size is imprecisely known but is believed to be <10,000 individuals.

    Range Extent

    Score2-3 - Local or Regional Endemic: Species has a small to very small range, though its distribution is either imprecisely documented or information to precisely categorize it was lacking at the time its status was reviewed.

    CommentEndemic to western Montana and central Idaho.

    Area of Occupancy

    Score2-3 - Very Low to Low. Occurs in 10 or fewer Subwatersheds (6th Code HUC’s), though the species' distribution is not sufficiently documented to place it within one class.

    Environmental Specificity

    Score2 - High: Species is restricted to a highly specialized and limited habitat and is typically dependent upon unaltered, high-quality habitat (C Values of 8-10).

    Trends

    Score1-2 - Minor to Moderate Declines:

    CommentActual trends are unknown due to a lack of data, though low elevation populations near Missoula may have experiened some negative impacts.

    Threats

    Score2 - High: 31-70% of the populations are being negatively impacted or are likely to be impacted by one or more activities or agents, which are expected to result in decreased populations and/or habitat quality and/or quantity.

    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 12 to 16 total points scored out of a possible 19.

 
General Description
See species description.

Diagnostic Characteristics
Intergrades with variety debilis. Variety camporum generally has narrow, entire leaves with gradually tapered petioles. In contrast, variety debilis has lobed or entire leaves that are wider and generally have a more distinct petiole. Variety camporum also typically grows at lower elevations, though the varieties overlap in habitat.

Species Range
Present
 


Summary of Observations Submitted for Montana
Number of Observations: 7

(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
Low elevation, scree, talus and rocky slopes from near the valley bottoms to the montane zone.

Ecological Systems Associated with this Species

References
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Citation for data on this website:
Alpine Collomia — Collomia debilis var. camporum.  Montana Field Guide.  .  Retrieved on , from