Plants that grow on other plants for structural support, but do not consume nutrients or energy from them, are called:

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Epiphytes are plants that grow on the surface of other plants for structural support, but do not rely on them for nutrients or energy. They often grow in tropical or humid environments where the ground is saturated or nutrient-poor, so they have adapted to grow on other plants to access sunlight and moisture in the air. Parasites, on the other hand, do consume nutrients and energy from their host plants, and can cause harm or even death to them. Lycophytes, photophytes, and tracheophytes are all types of plant groups or adaptations, but are not specific to plants that grow on others.

Plants That Grow on Other Plants for Structural Support, but Do