Arceuthobium pusillum, commonly known as dwarf mistletoe, is a parasitic plant that grows on the branches of coniferous trees. It is often used as a model for studying host-parasite interactions and has several synonyms, including Arceuthobium americanum, Arceuthobium littorum, and Arceuthobium douglasii. This plant is infamous for causing damage to forests by reducing tree growth and increasing susceptibility to secondary infections. Although it is considered a pest, Arceuthobium pusillum is also valuable for its medicinal properties and has been used in traditional medicine to treat various ailments. Understanding the various synonyms of this plant is essential for accurate communication among scientists and researchers working on this subject.