Devil's-club - Oplopanax horridus
MNPS Threat Rank
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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
This is the only North American Oplopanax species.
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:
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Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Low areas of moist to wet forest, uncommon on avalanche slopes; montane, lower subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
- Additional ReferencesLegend: View Online Publication
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- Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.