Toxicodendron radicans (poison ivy)
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Notes
Key Characteristics
- Usually a creeping or climbing vine, but may be an erect shrub; climbing tree trunks, attaching to the bark by tiny aerial rootlets, and branching toward 1 m.
- Bark gray
- Leaves alternate, pinnately compound, 2 leaflets, 15-30 cm long; leaflets 5-12 cm long; terminal leaflet longer-stalked than laterals; ovate to rhombic, short-acuminate; entire or sparingly or coarsely dentate or sinuate; usually more or less wrinkled; glabrous, lustrous yellowish green above, more or less pubescent beneath; not aromatic; petioles 5-10 cm long.
- Twigs slender, yellowish brown, sparingly pubescent or glabrate.
- Winter buds naked, light brown, scurfy-pubescent; terminal buds erect, fingerlike; lateral buds much smaller, appressed.
Sourced from "Michigan Shrubs"
Comments
Pictures
Many come from Steve Baskauf at Vanderbilt University
The 2 photos with purplish stems and fine-toothed leaves are definitely not Poison Ivy. The leaves look like a Rubus species. The stems have the color and bloom of Black Raspberry Rubus occidentalis but the bristly character of Wine Raspberry Rubus phoenicolasius.
Thanks for pointing that out. I've updated the page.