Parasitic Plants are type of plants that lives on other plants.
Here in tropical climate, we can see a lot of parasitic plants on the trunk or branch of a large tree. It is amazing how different plants live together under a "house" of usually larger "Host Plant".The photo was taken at NCD Botanical Garden in Port Moresby.
By the way, I thought that Orchids were also parasitic.
But, according to the expert, none of the orchids are parasitic.
"In nature, many orchids cling to trees and bushes as a growth habit; but they take nothing from the host plant and do not injure it in any way. Orchids that can grow on trees are called epiphytes or, more commonly, air plants" ---- from website of "Orchid House"