Liana
Lianas are vines which live in rainforests. They are climbing plants which are rooted in the ground. Then they wrap around trees as they grow. Rain forests have them everywhere there are trees.
The term "liana" refers to the vine, not the tree. It is not a taxonomic group: many plants have adopted this growth-mode.
Liana Media
Mixed-species tangle of lianas in tropical Australia
Lianas in Udawattakele, Sri Lanka
A canopy of Entada gigas that has formed over a monkey ladder vine (Bauhinia glabra) on Kauai, Hawaii
Other websites
Media related to Liana at Wikimedia Commons