Lianas are vascular plants rooted in the ground and maintain erectness of their stem by making use of other trees for support.
They do not maintain a direct relationship with those trees. Discuss the type of association the lianas have with the trees.
Lianas are in competition with other trees. While taking support from other trees, lianas usually strangulate the other tree. They also compete for sunlight and water and in the process, harm the host tree.