Phoradendron Flavescens, commonly known as the American mistletoe, is a parasitic plant that grows on a variety of trees. While there may not be direct synonyms for this particular plant, some words that could be used in conjunction with it include: parasitic, hemiparasitic, mistletoe, and semiparasitic. These words refer to the same general idea of a plant that feeds off of another organism, but they may have slightly different connotations and contexts in which they are used. Ultimately, it may be most effective to use the specific name of the plant, or to describe its characteristics in detail, rather than attempting to substitute with synonyms.