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Montana Field Guide

Montana Field Guides

Adnate Moonwort - Botrychium sp. 4
Other Names:  Botrychium adnatum

Species of Concern
Native Species

Global Rank: G1?
State Rank: S1S2
(see State Rank Reason below)

Agency Status


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 sp. 4) 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).


    Score0-3 - Population trends are unknown.


    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According to unpublished information by Farrar and colleagues, this species has broadly attached ("adnate") pinnae that merge gradually into the rachis (that is, the pinnae are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
Montana Range


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Currently only known in the western part of Glacier National Park, according to an unpublished summary by Donald Farrar (Iowa State Univeristy)

Observations in Montana Natural Heritage Program Database
Number of Observations: 7

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)

Mesic fescue grasslands.

Ecological Systems Associated with this Species

  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Farrar, Donald. 2011. Moonwort (Botrychium) Systematics. Ada Hayden Herbarium. Iowa State University.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Adnate Moonwort — Botrychium sp. 4.  Montana Field Guide.  .  Retrieved on , from