Poison Ivy In a Tree

poison ivy in a tree crotch

Here is a new one: a poison ivy vine growing out of the crotch of a maple tree, about 5 feet from the ground.

The roots don't wrap around the tree and touch the ground: they either start and stop right in the crotch, or even stranger, grow INSIDE the tree trunk.

I have never seen this before in 65 years of staring at poison ivy.