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Montana Field Guide

Montana Field Guides

Piper's Oregon-grape - Berberis aquifolium
Other Names:  Mahonia aquifolium

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Native Species

Global Rank: G5
State Rank: SNR
C-value:


Agency Status
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USFS:
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General Description
Stoloniferous, similar to B. repens. Stems sometimes erect, 15–100 cm. Leaves to 20 cm long, pinnately divided into 5 to 9 ovate leaflets. Leaflets more than twice as long as wide, often glossy below, not white-papillose, 3–8 cm long with 12 to 29 prominent spinulose teeth. Flowers with sepals 6–8 mm long. Fruit blue, 7–14 mm long. (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
BC to CA, ID, MT (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 99

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Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat

Ecology
POLLINATORS
The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus vagans, Bombus melanopygus, Bombus mixtus, Bombus terricola, Bombus bimaculatus, Bombus griseocollis, and Bombus impatiens (Plath 1934, Macior 1968, Thorp et al. 1983, Colla and Dumesh 2010).

References
  • Literature Cited AboveLegend:   View Online Publication
    • Colla, S.R. and S. Dumesh. 2010. The bumble bees of southern Ontario: notes on natural history and distribution. Journal of the Entomological Society of Ontario 141:39-68.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Macior, L.M. 1968. Bombus (Hymenoptera, Apidae) queen foraging in relation to vernal pollination in Wisconsin. Ecology 49:20-25.
    • Plath, O.E. 1934. Bumblebees and their ways. New York, NY: Macmillan Company. 201 p.
    • Thorp, R.W., D.S. Horning, and L.L. Dunning. 1983. Bumble bees and cuckoo bumble bees of California (Hymenoptera: Apidae). Bulletin of the California Insect Survey 23:1-79.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Gaffney, W.S. 1941. The effects of winter elk browsing, South Fork of the Flathead River, Montana. Journal of Wildlife Management 5(4):427-453.
    • 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 "Piper's Oregon-grape"
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Citation for data on this website:
Piper's Oregon-grape — Berberis aquifolium.  Montana Field Guide.  .  Retrieved on , from