Search Field Guide
Advanced Search
Montana Field Guide

Montana Field Guides

Devil's-club - Oplopanax horridus


Global Rank: G5
State Rank: S5

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 7

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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
This is the only North American Oplopanax species.

Species Range
Present
 


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.

Summary of Observations Submitted for Montana
Number of Observations: 106

(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 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
Login Logout
Citation for data on this website:
Devil's-club — Oplopanax horridus.  Montana Field Guide.  .  Retrieved on , from