American Cranberrybush - Viburnum opulus
(see State Rank Reason below)
MNPS Threat Rank
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
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
ScoreD - Broad. Generalist or community with all key requirements common
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
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:
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Map Help and Descriptions
(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.