Search Field Guide
Advanced Search
MT Gov Logo
Montana Field Guide

Montana Field Guides

Frenchman's Bluff Moonwort - Botrychium gallicomontanum

No photos are currently available
If you have a high quality photo of this species, are confident in the identification, and would like to submit it for inclusion on the Montana Field Guide, please send it to us using our online photo submission tool.

Species of Concern
Native Species

Global Rank: G2
State Rank: S1S2
(see State Rank Reason below)
CCVI: Less Vulnerable

Agency Status
USFS: Species of Conservation Concern in Forests (CG)


External Links

State Rank Reason (see State Rank above)
A globally rare species, recently documented in Montana from Glacier National Park
  • Details on Status Ranking and Review
    Frenchman's Bluff Moonwort (Botrychium gallicomontanum) Conservation Status Review
    Review Date = 06/04/2012
    View State Conservation Rank Criteria
    Population Size

    Score3 - Vey Small: Generally <2,000 individuals.

    Comment<100 plants actually documented in Montana, though population is almost certainly larger.

    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

    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 10 to 15 total points scored out of a possible 19.

General Description
Trophophore 1-8 mm; blade yellow-green, ovate to oblong-linear, 1-pinnate, to 3 × 0.9 cm, firm, glaucescent. Pinnae to 6 pairs, strongly ascending, well separated, distance between the 1st and 2d pinnae considerably greater than between 2d and 3d pairs, basal pinna pair approximately equal in size and cutting to adjacent pair, fan-shaped to narrowly spatulate, often asymmetric, with distal portion longer than and arching over proximal portion, undivided to tip, rarely 2-cleft, margins entire to irregularly cleft, apex rounded, venation like ribs of fan, midrib absent. Sporophores 2-3-pinnate, 1.5-3 times length of trophophore (Wagner and Wagner, 1993, Fl. North America, Vol. 2).

Species Range
Montana Range Range Descriptions


Range Comments
An unpublished document by Donald Farrar (Iowa State University) indicates disjunct occurences in northwestern MT, northwestern MN, and the Black Hills region of SD.

Observations in Montana Natural Heritage Program Database
Number of Observations: 4

(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)

Fescue grasslands. Farrar (unpublished) indicates that its occurrence in MT and SD is in areas of high diversity in prairies.

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.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
  • Web Search Engines for Articles on "Frenchman's Bluff Moonwort"
Login Logout
Citation for data on this website:
Frenchman's Bluff Moonwort — Botrychium gallicomontanum.  Montana Field Guide.  .  Retrieved on , from