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Montana Field Guide

Montana Field Guides

Cliff Toothwort - Cardamine rupicola

Species of Concern
Native Species

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

Agency Status
MNPS Threat Rank: 3

External Links

State Rank Reason (see State Rank above)
State endemic known from 3 population clusters. These are in the Mission Mtns, Swan Range and the Rocky Mtn Front Range. Many occurrences have not been surveyed for 30 or more years and many are based on a single herbarium specimen. However, the species grows at high elevations in rock and scree fields that generally are not subject to disturbance or other threats. Many populations also occur in designated wilderness areas which offer further protection. Additional occurrences likely exist across the known range of the species.
  • Details on Status Ranking and Review
    Cliff Toothwort (Cardamine rupicola) Conservation Status Review
    Review Date = 10/17/2012
    View State Conservation Rank Criteria
    Population Size

    Score1 - Moderate: Generally 10,000-100,000 individuals.

    CommentPopulation size is imprecisely known, though available data supports an estimate of at least 10,000 plants and the total could easily be much larger.

    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

    Score1 - Moderate: Generally occurring in 11-25 Subwatersheds (6th Code HUC’s).

    Environmental Specificity

    Score1-2 - Moderate to High.

    CommentLimited to limestone or calcareous talus, scree or cliffs in the alpine.


    Score0-1 - Stable to Minor Declines:

    CommentTrend are undocumented, though populations are likely stable or experiencing only minor declines. Monitoring data are needed.


    Score0-1 - Low to Medium.

    CommentThreats appear to be minimal and would primarily be limited to potential impacts related to climate change.

    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.

    CommentSpecific life history characteristics and limitations are unknown.

    Raw Conservation Status Score

    Score 7 to 10 total points scored out of a possible 19.

General Description
Rhizomatous perennial. Stems prostrate to ascending, to 15 cm. Leaves thick; those born on rhizome and stem similar, palmately to pinnately divided into 3 to 7 oblanceolate lobes or leaflets 1–4 cm long. Petals 7–13 mm long. Fruits erect, 15–40 mm × 1–2 mm; the beak 4–6 mm long; pedicels 1–2 cm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Flowering in June and July

Species Range
Montana Range


Range Comments
Montana endemic.

Observations in Montana Natural Heritage Program Database
Number of Observations: 59

(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)

Sparsely vegetated, stony soil or talus derived from limestone in the subalpine and alpine zones.

Ecological Systems Associated with this Species

  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Rollins, R. C. 1993. The Cruciferae of Continental North America: systematics of the mustard family from the Arctic to Panama. Stanford University Press, Stanford, California. 976 pp.
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Citation for data on this website:
Cliff Toothwort — Cardamine rupicola.  Montana Field Guide.  .  Retrieved on , from