The trees here have become entwined with wild grape vines. Smaller diameter stems of grapevine become attached to host trees by means of tendrils that grasp. The vine then entwines the host by circumnutation, a kind of whip-like wrapping process that anchors the vine and allows them to get from the shaded forest floor into the canopy of the trees without having to invest in a lot of wood. In the foreground, there is some indication that there are two vine species here. The papery red/purple bark is most likely grapevine, the lighter colored vine with what look like roots coming from the bark may be either poison ivy or perhaps Oriental Bittersweet (an invasive exotic species).