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Montana Field Guides

American Cranberrybush - Viburnum opulus

Non-native Species

Global Rank: G5
State Rank: SNA
(see State Rank Reason below)

Agency Status
MNPS Threat Rank:
C-value: 1

External Links

State Rank Reason (see State Rank above)
Viburnum opulis has been documented at 11 locations in western Montana. It was first documented along a manmade ditch in 1973. Since then it has been found in natural areas or along rivers all within city limits, and in Lee Metcalf Wildlife Refuge. Several herbarium specimens state that the plant may have been dispersed from birds and/or sourced by nearby gardens. Therefore Viburnum opulus is considered to be introduced in Montana and is ranked as SNA because a conservation status rank is not applicable for exotic species.
  • Details on Status Ranking and Review
    American Cranberrybush (Viburnum opulus) Conservation Status Review
    Review Date = 09/04/2018
    View State Conservation Rank Criteria
    Range Extent

    ScoreD - 1,000-5,000 sq km (~400-2,000 sq mi)

    Area of Occupancy

    ScoreD - 6-25 4-km2 grid cells

    Number of Populations

    ScoreB - 6 - 20

    Environmental Specificity

    ScoreD - Broad. Generalist or community with all key requirements common

General Description
Stems spreading to erect, branched, 1–3 m; twigs green-brown, glabrous. Leaves stipulate; blades ovate, 3-lobed above, dentate or lobed again, 4–10 cm long, hirsute beneath; lobes acuminate. Inflorescence 6–10 cm across. Flowers corolla subrotate, 2–3 mm long; outermost ring of flowers rotate, sterile, 1–2 cm across. Drupe red, 10–15 mm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
BC to NL south to WA, MT, SD, IL and PA; Europe (Lesica et al. 2012). It is presumed to have escaped from cultivation in MT.

Observations in Montana Natural Heritage Program Database
Number of Observations: 42

(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)

In riparian forests and along rivers and ditches within areas of anthropogenic influence. Valleys.

It is likely spread by birds.

Potential and Known Pollinators:
The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus pensylvanicus and Bombus griseocollis (Colla and Dumesh 2010).


  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Little, E.L., Jr. 1979. Checklist of United States trees (native and naturalized). Agriculture Handbook No. 541. U.S. Forest Service, Washington, D.C. 375 pp.
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Citation for data on this website:
American Cranberrybush — Viburnum opulus.  Montana Field Guide.  .  Retrieved on , from