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Montana Field Guide

Montana Field Guides

Adnate Moonwort - Botrychium adnatum

Species of Concern

Global Rank: G1?
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)
A tentatively recognized species that has not been formally published; currently known only from northwest Montana.
  • Details on Status Ranking and Review
    Adnate Moonwort (Botrychium adnatum) Conservation Status Review
    Review Date = 06/04/2012
    View State Conservation Rank Criteria
    Population Size

    Score3 - Vey Small: Generally <2,000 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

    Score3 - Very Low: Generally occurring in 3 or fewer 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

    Score0-3 - Population trends are unknown.

    Threats

    Score0-1 - Low to Medium.

    Intrinsic Vulnerability

    Score1-2 - Moderate to High Vulnerability.

    Raw Conservation Status Score

    Score 11 to 16 total points scored out of a possible 19.

 
General Description
According to unpublished information by Farrar and colleagues, this species has broadly attached ("adnate") pinnae that merge gradually into the rachis (that is, the pinnae are decurrent). The species is also said to be conspicuously glaucous and blue-gray in color.

Species Range
Present
 


Range Comments
Currently only known in the western part of Glacier National Park, according to an unpublished summary by Donald Farrar (Iowa State Univeristy)

Summary of Observations Submitted for Montana
Number of Observations: 6

(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
Mesic fescue grasslands.

Ecological Systems Associated with this Species

References
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Citation for data on this website:
Adnate Moonwort — Botrychium adnatum.  Montana Field Guide.  .  Retrieved on , from