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Montana Field Guide

Montana Field Guides

Alderleaf Buckthorn - Rhamnus alnifolia

Native Species

Global Rank: G5
State Rank: S4
C-value: 4


Agency Status
USFWS:
USFS:
BLM:


 

External Links






 
General Description
Dioecious shrub. Stems erect or ascending, 50–200 cm; twigs gray. Leaves alternate, 3–12 cm long, glandular-serrate, puberulent on the veins below, petioles 5–15 mm long. Inflorescence few axillary, pedicellate flowers. Flowers functionally unisexual, 5-merous; sepals 1–2 mm long; petals lacking; stigmas 3. Drupe 3-seeded, 5–9 mm wide, poisonous (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range

Year-round
 


Range Comments
BC to NL south to CA, WY, NE, OH and NJ (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 485

(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
Wet forest openings or forming thickets along the margins of marshes, swamps, lakes, fens; valleys, montane (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Ecology
POLLINATORS
The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus mixtus and Bombus pensylvanicus (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.
    • 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?
    • Culver, D.R. 1994. Floristic analysis of the Centennial Region, Montana. M.Sc. Thesis. Montana State University, Bozeman. 199 pp.
    • 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.
    • Johnson, T. W. 1982. An analysis of pack and saddle stock grazing areas in the Bob Marshall Wilderness. M.Sc.Thesis. Bozeman, MT: Montana State University. 105 p.
    • Morgan, J.T. 1993. Summer habitat use of white-tailed deer on the Tally Lake ranger district, Flathead National Forest. Ph.D. Dissertation. Montana State University, Bozeman. pp. 103.
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Citation for data on this website:
Alderleaf Buckthorn — Rhamnus alnifolia.  Montana Field Guide.  .  Retrieved on , from