Creeper vs Ivy Confusion!

Virginia Creeper versus poison ivy

Here we have two vines that are constantly mistaken for each other, and for good reason: they often grow side by side, or even intertwined.

On the left are two 5-leaflet Virginia creeper leaves, coming from a thin vine. 

But this vine is crossing right over a poison ivy vine that has two three-leaflet leaves on it. Note that one of the poison ivy triple-eaves is green, one reddish, like the creeper.

Note also that the poison ivy vine has hairy roots attaching it to the rock surface, whereas the Virgina creeper has thicker anchors, not hairy ones, attaching it to the rock.

By growing intertwined like this, they make it hard to see that there are two different vines.

Occcasionally, people are allergic to creeper, but hardly it is hardly the menace that poison ivy (and oak and sumac) presents each summer.