We squirrels see that you humans are still fervently searching to learn which is the vine that causes the nasty rash. Sometimes it’s not easy to sort these leaves of five and three, especially if they are growing close together.
Here’s a great example of both the five leaflet and three leaflet leaves on the same plant…or so you might think, if you don’t look closer. That’s the poison ivy, three leaflets, on the outside. The five leaflet leaf in the middle is Virginia Creeper.
These two native vines are growing side by side from separate plants. The separate seeds were likely dropped by bids perching on this favorite log after they’d eaten the berries of the different plants.
But to make matters evermore confusing, the five leaved Virginia Creeper is trailing over the ground and near another three-leaflet plant that is not Poison Ivy.
Those are blackberry sprouts, that will turn into arching canes that look somewhat shrubby.
The blackberry leaves are in threes or fives, much like others of their rose family. They have more teeth along the edges of the leaflets and thorns. The thorns are the real giveaway that this is a member of the rose family, and not one of the other two vines.