Three leaflets on red stalks, the middle one on a noticeably longer stalk than the two beside it. Leaf edges vary from smooth to toothed on the same plant, so count leaflets rather than reading the edge.The part people miss: that hairy rope on the trunk is the plant itself, not something it is growing on. It has no leaves in winter and it will still give you a rash.Photo: iNaturalist (CC0), Lynn HarperDull, waxy, off-white berries in November. Nothing else here has white berries, so they identify it at a distance on a bare winter stem.Photo: iNaturalist (CC0), Diego BlancoGreenish-white flower clusters in early summer, where the leaves join the stem. These become the white berries.
✅ Native - Preserve
Poison Ivy
Toxicodendron radicans
This is a native species that supports local ecosystems. Please do not remove this plant.
Description
A native vine with three leaflets (leading to the saying "leaves of three, let it be"). The stalk of the middle leaflet is much longer than the stalks of the two side leaflets. While it causes skin irritation, poison ivy is native and its white berries provides food for birds. Avoid removing it unless it poses a safety hazard, removal requires extensive protection.
Where you'll find it
Climbing trunks as a hairy rope. That furry cable on the bark is the plant, not a vine it is growing on.
Trail edges, fence lines and sunny woodland edges, as a low shrub or a ground runner.
Mixed straight through the ivy and bittersweet you came to cut. Assume it is present before you kneel.
How to identify
The leaf
Three leaflets, the middle one on a noticeably longer stalk.
Colour and texture: Glossy to dull green, often bronze-red on new growth and scarlet in autumn. Leaf edges range from smooth to coarsely toothed on the same plant, so shape alone will not do it. Count the leaflets.
Seedheads & fruit
Berries August through the winter.
Clusters of dull, waxy, off-white berries where the leaves join the stem.
Why it matters: Nothing else here carries white berries, so they identify it at a distance, including on a bare winter vine that will still give you a rash.
Both native, both stay, and this is the comparison people actually need at a work party. Not to decide what to cut, but to decide what to kneel in. They climb the same trunks, often on the same tree, and in autumn they turn the same red.
Virginia Creeper
Parthenocissus quinquefolia
Native: keep
Five leaflets from one point.
Poison Ivy
Toxicodendron radicans
Native: do not touch
Three leaflets, the middle one on a longer stalk.
Count the leaflets
Virginia Creeper
Five, spreading from a single point like fingers from a palm. Occasionally three on very young growth, so check a few leaves, not one.
Virginia creeper: five leaflets from one point.
Poison Ivy
Three, always. The middle one sits on a noticeably longer stalk than the two beside it.
Poison ivy: three leaflets, middle one on a longer stalk.
The vine on the trunk
Virginia Creeper
A slender vine holding on with tendrils that end in small sticky pads, like tiny suckers.
Poison Ivy
A thick, hairy rope of aerial rootlets clinging flat to the bark. That furry cable is the plant itself, and it will give you a rash in January with no leaves on it at all.
Poison ivy on a trunk in December. The rope IS the plant.
Berries
Virginia Creeper
Blue-black, on bright coral-red stalks.
Virginia creeper berries: blue-black on red stalks.
Poison Ivy
Dull, waxy, off-white. Nothing else here has white berries.
Poison ivy berries: dull off-white, on a bare November stem.
If you touched it
Virginia Creeper
Nothing to do. It is harmless.
Poison Ivy
Wash with the poison-ivy cleanser in the kit within a couple of hours, and treat gloves, tools and trousers as contaminated, because the oil transfers off them for a long time afterwards.
When in doubt, leave the plant and ask a site lead before removing it.
