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Devil's-club - Oplopanax horridus
Native Species
Global Rank:
G5
State Rank:
S5
C-value:
7
Agency Status
USFWS:
USFS:
BLM:
External Links
General Description
Deciduous shrubs. Stems densely spiny, 1–2 m, usually unbranched. Herbage villous with spines along the leaf veins and petioles. Leaf blades orbicular, cordate, 10–30 cm wide with 5 to 9 acuminate, dentate lobes. Inflorescence dense umbels in a raceme 8–20 cm long. Flowers greenish; sepals minute; petals 2–3 mm long; stamens 5. Drupes red, 4–6 mm wide (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Diagnostic Characteristics
This is the only North American Oplopanax species.
Species Range
Montana Range
Range Descriptions
Native
Range Comments
Oplopanax horridus is concentrated in the Pacific Northwest, western Canada, and Alaska. It also occurs disjunctly in Michigan and Ontario, where it is considered rare.
Observations in Montana Natural Heritage Program Database
Number of Observations: 536
(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
Low areas of moist to wet forest, uncommon on avalanche slopes; montane, lower subalpine (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Stewardship Responsibility
References
- 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?
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.
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