Once the trees shed their leaves you can see bundles of green scattered about the bare branches. This, most likely, is mistletoe, a parasitic plant that grows on most trees. It never grows out of the soil.
Before the harsh cold, this winter, shriveled the leaves of the mistletoe in my neighborhood, I was able to get photos of some that were growing low on the trees lining my street.
There are no berries on these plants. Berries can usually be found in the early fall. I imagine the bird population in my neighborhood devoured them because I saw no remnants on these branches.