There are many parasitic plants, like the well-known mistletoe, which eat other plants. Unlike mistletoe, some of the other parasitic plants have given up completely on phototrophy, depending only on the nutrients sucked from the host plant.

It is likely that there are much more parasitic plants than carnivorous plants.

Plants that feed on other plants must do it similarly to a fungus, by penetrating them and growing into them a root-like organ, for sucking their fluids.

A plant could not bite and chew another plant, because, like the fungal cells, the plant cells have abandoned their ancestral animal-like mobility, by covering their cells with walls made of cellulose, which prevent cell mobility. While there are a few plants capable of infrequent fast movements, like the Venus flytrap, they use special tricks for creating tension in an elastic structure, like when drawing a bow, which would not be suitable for sustaining a sequence of movements.