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Montana Field Guide

Montana Field Guides

Arctic Buttercup - Ranunculus grayi
Other Names:  Ranunculus karelinii, Ranunculus verecundus, Ranunculus gelidus

Species of Concern

Global Rank: G4G5
State Rank: S3
* (see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank: 3
C-value: 9

External Links






State Rank Reason (see State Rank above)
Also includes R. verecundus, which was formerly tracked as a separate Species of Concern.
  • Details on Status Ranking and Review
    Arctic Buttercup (Ranunculus grayi) Conservation Status Review
    Review Date = 05/21/2013
    View State Conservation Rank Criteria
    Population Size

    Score2 - Small: Generally 2,000-10,000 individuals.

    Range Extent

    Score0 - Widespread species within Montana (occurs in 5% or more of the state or generally occurring in 6 or more sub-basins.) as well as outside of Montana.

    Area of Occupancy

    Score2 - Low: Generally occurring in 4-10 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

    ScoreNA - Rank factor not assessed.

    CommentTrends are unknown.

    Threats

    Score0-1 - Low to Medium.

    Intrinsic Vulnerability

    Score0-1 - Low to Moderate Vulnerability.

    Raw Conservation Status Score

    Score 5 to 7 total points scored out of a possible 16 (Rarity factors and threats only).

 
General Description
Arctic Buttercup is a short-lived perennial with fibrous roots and 1 to several slender, erect or ascending stems that are 3-20 cm tall. The basal leaves have long petioles and broadly spade-shaped blades that are 1-2 cm long and deeply palmately divided into 3-13 oblong lobes. Stem leaves are lacking or reduced to small, 3-lobed, leaf-like bracts. Foliage is glabrous to sparsely short-hairy above. Flowers are generally solitary at the stem tips. The 5 spreading or reflexed, purplish sepals are 2-5 mm long, and the yellow petals are 3-5 mm long and narrow into a short basal stem. There are numerous stamens. There are 30-80 glabrous achenes; each ca. 1-2 mm long with a short beak and borne in a short-cylindric cluster.

Phenology
Flowering in June-August, fruiting in August.

Diagnostic Characteristics
Ranunculus is a large genus; a technical manual should be consulted for positive identification.

Species Range
Present
 


Range Comments
AK south through WA and OR to UT and CO (Kartesz in prep. 2012).

Summary of Observations Submitted for Montana
Number of Observations: 17

(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
Gravelly, usually moist, sparsely-vegetated soils of benches, moraines and open slopes near timberline or in the alpine zone.

References
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Citation for data on this website:
Arctic Buttercup — Ranunculus grayi.  Montana Field Guide.  .  Retrieved on , from